Smooth-Joint Model Implementation
See this page for the documentation of this contact model.
contactmodelsmoothjoint.h
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 | #pragma once
// contactmodelsmoothjoint.h
#include "contactmodel/src/contactmodelmechanical.h"
#ifdef SMOOTHJOINT_LIB
# define SMOOTHJOINT_EXPORT EXPORT_TAG
#elif defined(NO_MODEL_IMPORT)
# define SMOOTHJOINT_EXPORT
#else
# define SMOOTHJOINT_EXPORT IMPORT_TAG
#endif
namespace cmodelsxd {
using namespace itasca;
class ContactModelSmoothJoint : public ContactModelMechanical {
public:
enum PropertyKeys {
kwKn=1
, kwKs
, kwFric
, kwDA
, kwState
, kwTen
, kwBCoh
, kwBFA
, kwShear
, kwRMul
, kwLarge
, kwFn
, kwFs
, kwGap
, kwNorm
, kwArea
, kwRad
, kwUn
, kwUs
, kwSlip
, kwDip
, kwDD
};
enum FishCallEvents { fBondBreak=0, fSlipChange };
SMOOTHJOINT_EXPORT ContactModelSmoothJoint();
SMOOTHJOINT_EXPORT virtual ~ContactModelSmoothJoint();
virtual void copy(const ContactModel *c);
virtual void archive(ArchiveStream &);
virtual QString getName() const { return "smoothjoint"; }
virtual void setIndex(int i) { index_=i;}
virtual int getIndex() const {return index_;}
virtual QString getProperties() const {
return "sj_kn"
",sj_ks"
",sj_fric"
",sj_da"
",sj_state"
",sj_ten"
",sj_coh"
",sj_fa"
",sj_shear"
",sj_rmul"
",sj_large"
",sj_fn"
",sj_fs"
",sj_gap"
",sj_unorm"
",sj_area"
",sj_radius"
",sj_un"
",sj_us"
",sj_slip"
",dip"
#ifdef THREED
",ddir"
#endif
;
}
virtual QString getFishCallEvents() const { return "bond_break,slip_change"; }
virtual QVariant getProperty(uint i,const IContact *con=0) const;
virtual bool getPropertyGlobal(uint i) const;
virtual bool setProperty(uint i,const QVariant &v,IContact *con=0);
virtual bool getPropertyReadOnly(uint i) const;
virtual bool supportsInheritance(uint i) const;
virtual bool getInheritance(uint i) const { assert(i<32); quint32 mask = to<quint32>(1 << i); return (inheritanceField_ & mask) ? true : false; }
virtual void setInheritance(uint i,bool b) { assert(i<32); quint32 mask = to<quint32>(1 << i); if (b) inheritanceField_ |= mask; else inheritanceField_ &= ~mask; }
enum MethodKeys {
kwSetForce=1,kwBond,kwUnbond
};
virtual QString getMethods() const {
return "sj_setforce,bond,unbond";
}
virtual QString getMethodArguments(uint i) const;
virtual bool setMethod(uint i,const QVector<QVariant> &vl,IContact *con=0); // Base 1 - returns true if timestep contributions need to be updated
virtual uint getMinorVersion() const;
enum EnergyKeys { kwEStrain=1,kwESlip};
virtual QString getEnergies() const { return "energy-strain,energy-slip";}
virtual double getEnergy(uint i) const; // Base 1
virtual bool getEnergyAccumulate(uint i) const; // Base 1
virtual void setEnergy(uint i,const double &d); // Base 1
virtual void activateEnergy() { if (energies_) return; energies_ = NEWC(Energies());}
virtual bool getEnergyActivated() const {return (energies_ !=0);}
virtual bool validate(ContactModelMechanicalState *state,const double ×tep);
virtual bool endPropertyUpdated(const QString &name,const IContactMechanical *c);
virtual bool forceDisplacementLaw(ContactModelMechanicalState *state,const double ×tep);
virtual DVect2 getEffectiveTranslationalStiffness() const {return effectiveTranslationalStiffness_;}
virtual DAVect getEffectiveRotationalStiffness() const {return DAVect(0.0);}
virtual ContactModelSmoothJoint *clone() const { return NEWC(ContactModelSmoothJoint()); }
virtual double getActivityDistance() const {return 0.0;}
virtual void resetForcesAndMoments() { sj_Fn(0.0); sj_Fs(DVect(0.0)); }
virtual void setForce(const DVect &v,IContact *);
virtual void setArea(const double &) { throw Exception("The setArea method cannot be used with this contact model."); }
virtual bool isOKToDelete() const { return (!isBonded() && sj_large_); }
virtual bool checkActivity(const double &gap) { return ( !sj_large_ || gap <= 0.0 || isBonded()); }
virtual bool isSliding() const { return isjSliding_; }
virtual bool isBonded() const { return sj_state_ == 3; }
virtual bool hasNormal() const { return true; }
virtual DVect getNormal() const { return sj_unorm_; }
void sj_kn(const double &d) {sj_kn_ = d;}
void sj_ks(const double &d) {sj_ks_ = d;}
void sj_fric(const double &d) {sj_fric_ = d;}
void sj_da(const double &d) {sj_da_ = d;}
void sj_state(const double &d) {sj_state_ = d;}
void sj_bns(const double &d) {sj_bns_ = d;}
void sj_bcoh(const double &d) {sj_bcoh_ = d;}
void sj_bfa(const double &d) {sj_bfa_ = d;}
void dip(const double &d) {dip_ = d;}
void sj_rmul(const double &d) {sj_rmul_ = d;}
void sj_large(bool b) {sj_large_ = b;}
const double & sj_kn() const {return sj_kn_;}
const double & sj_ks() const {return sj_ks_;}
const double & sj_fric() const {return sj_fric_;}
const double & sj_da() const {return sj_da_;}
int sj_state() const {return sj_state_;}
const double & sj_bns() const {return sj_bns_;}
const double & sj_bcoh() const {return sj_bcoh_;}
const double & sj_bfa() const {return sj_bfa_;}
const double & dip() const {return dip_;}
const double & sj_rmul() const {return sj_rmul_;}
bool sj_large() const {return sj_large_;}
#ifdef THREED
const double & dd() const {return dd_;}
void dd(const double &d) {dd_ =d;}
#endif
void sj_unorm(const DVect &v) {sj_unorm_ = v;}
void sj_A(const double &d) {sj_A_ = d;}
void sj_rad(const double &d) {sj_rad_ = d;}
void sj_gap(const double &d) {sj_gap_ = d;}
void sj_Un(const double &d) {sj_Un_ = d;}
void sj_Us(const DVect &v) {sj_Us_ = v;}
void sj_Fn(const double &d) {sj_Fn_ = d;}
void sj_Fs(const DVect &v) {sj_Fs_ = v;}
void isjFlip(bool b) {isjFlip_ = b;}
void isjSliding(bool b) {isjSliding_ = b;}
const DVect & sj_unorm() const {return sj_unorm_;}
const double & sj_A() const {return sj_A_;}
const double & sj_rad() const {return sj_rad_;}
const double & sj_gap() const {return sj_gap_;}
const double & sj_Un() const {return sj_Un_;}
const DVect & sj_Us() const {return sj_Us_;}
const double & sj_Fn() const {return sj_Fn_;}
const DVect & sj_Fs() const {return sj_Fs_;}
bool isjFlip() const {return isjFlip_;}
bool isjSliding() const {return isjSliding_;}
bool hasEnergies() const {return energies_ ? true:false;}
double estrain() const {return hasEnergies() ? energies_->estrain_: 0.0;}
void estrain(const double &d) { if(!hasEnergies()) return; energies_->estrain_=d;}
double eslip() const {return hasEnergies() ? energies_->eslip_: 0.0;}
void eslip(const double &d) { if(!hasEnergies()) return; energies_->eslip_=d;}
uint inheritanceField() const {return inheritanceField_;}
void inheritanceField(uint i) {inheritanceField_ = i;}
const DVect2 & effectiveTranslationalStiffness() const {return effectiveTranslationalStiffness_;}
void effectiveTranslationalStiffness(const DVect2 &v ) {effectiveTranslationalStiffness_=v;}
bool geomRecomp() const {return geomRecomp_ ;}
void geomRecomp(bool b) {geomRecomp_ = b;}
/// Return the total force that the contact model holds.
virtual DVect getForce(const IContactMechanical *) const;
/// Return the total moment on 1 that the contact model holds
virtual DAVect getMomentOn1(const IContactMechanical *) const;
/// Return the total moment on 1 that the contact model holds
virtual DAVect getMomentOn2(const IContactMechanical *) const;
private:
static int index_;
struct Energies {
Energies() : estrain_(0.0), eslip_(0.0) {}
double estrain_; // elastic energy stored in contact
double eslip_; // work dissipated by friction
};
bool updateKn(const IContactMechanical *con);
bool updateKs(const IContactMechanical *con);
bool updateFric(const IContactMechanical *con);
void updateAreaAndNormal(ContactModelMechanicalState *state);
double calcBSS() const;
void updateEffectiveTranslationalStiffness();
// property set fields
quint32 inheritanceField_;
// smooth joint model - contact model properties
double sj_kn_; // normal stiffness
double sj_ks_; // shear stiffness
double sj_fric_; // Coulomb friction coefficient
double sj_da_; // Dilation angle (stored in radians, returned/set in degrees)
int sj_state_; // Bond state - 0 (NBNF), 1 (NBFT), 2 (NBFS), 3 (bonded)
double sj_bns_; // Bond normal (tensile) strength
double sj_bcoh_; // Bonded system cohesion
double sj_bfa_; // Bonded system friction angle (stored in radians, returned/set in degrees)
double dip_; // Dip angle (stored in radians, returned/set in degrees)
double sj_rmul_; // Radius multiplier
bool sj_large_; // Large strain indicator
// Internal state variables
DVect sj_unorm_; // Normal to the plane
double sj_A_; // Cross-sectional area
double sj_rad_; // Radius
double sj_gap_; // Gap - this can be user modified
double sj_Un_; // Normal displacement
DVect sj_Us_; // Shear displacement
double sj_Fn_; // Normal force
DVect sj_Fs_; // Shear force
bool isjFlip_; // In order to flip the order
bool isjSliding_;// True if this is sliding
DVect2 effectiveTranslationalStiffness_;
bool geomRecomp_; // If true then there must be a validate before FD!
#ifdef THREED
double dd_; // Dip direction (stored in radians, returned/set in degrees)
#endif
//DAVect effectiveRotationalStiffness_;
Energies *energies_;
};
} // namespace itascaxd
// EoF
|
contactmodelsmoothjoint.cpp
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#include "contactmodelsmoothjoint.h"
#include "module/interface/icontactmechanical.h"
#include "module/interface/icontact.h"
#include "module/interface/ipiecemechanical.h"
#include "module/interface/ipiece.h"
#include "../version.txt"
#include "base/src/basetoqt.h"
#include "module/interface/ifishcalllist.h"
#include "kernel/interface/iprogram.h"
#include "utility/src/tptr.h"
#ifdef SMOOTHJOINT_LIB
int __stdcall DllMain(void *,unsigned, void *)
{
return 1;
}
extern "C" EXPORT_TAG const char *getName()
{
#if DIM==3
return "contactmodelmechanical3dsmoothjoint";
#else
return "contactmodelmechanical2dsmoothjoint";
#endif
}
extern "C" EXPORT_TAG unsigned getMajorVersion()
{
return MAJOR_VERSION;
}
extern "C" EXPORT_TAG unsigned getMinorVersion()
{
return MINOR_VERSION;
}
extern "C" EXPORT_TAG void *createInstance()
{
cmodelsxd::ContactModelSmoothJoint *m = NEWC(cmodelsxd::ContactModelSmoothJoint());
return (void *)m;
}
#endif // SMOOTHJOINT_EXPORTS
namespace cmodelsxd {
static const quint32 sjKnMask = 0x00002; // Base 1!
static const quint32 sjKsMask = 0x00004;
static const quint32 sjFricMask = 0x00008;
using namespace itasca;
int ContactModelSmoothJoint::index_ = -1;
UInt ContactModelSmoothJoint::getMinorVersion() const { return MINOR_VERSION;}
ContactModelSmoothJoint::ContactModelSmoothJoint() : inheritanceField_(sjKnMask|sjKsMask|sjFricMask)
, sj_kn_(0.0), sj_ks_(0.0), sj_fric_(0.0)
, sj_da_(0.0), sj_state_(0), sj_bns_(0.0)
, sj_bcoh_(0.0), sj_bfa_(0.0), dip_(0.0)
, sj_rmul_(1.0), sj_large_(false)
, sj_unorm_(0.0), sj_A_(0.0), sj_rad_(0.0)
, sj_gap_(0.0), sj_Un_(0.0), sj_Us_(0.0)
, sj_Fn_(0.0), sj_Fs_(0.0), isjFlip_(false)
, isjSliding_(false)
, effectiveTranslationalStiffness_(0.0)
, geomRecomp_(true)
#ifdef THREED
, dd_(0.0)
#endif
, energies_(0) {
// setFromParent(ContactModelMechanicalList::instance()->find(getName()));
}
ContactModelSmoothJoint::~ContactModelSmoothJoint() {
if (energies_)
delete energies_;
}
void ContactModelSmoothJoint::archive(ArchiveStream &stream) {
stream & sj_kn_;
stream & sj_ks_;
stream & sj_fric_;
stream & sj_da_;
stream & sj_state_;
stream & sj_bns_;
stream & sj_bcoh_;
stream & sj_bfa_;
stream & dip_;
stream & sj_rmul_;
stream & sj_large_;
stream & sj_unorm_;
stream & sj_A_;
stream & sj_rad_;
stream & sj_gap_;
stream & sj_Un_;
stream & sj_Us_;
stream & sj_Fn_;
stream & sj_Fs_;
stream & isjFlip_;
stream & isjSliding_;
#ifdef THREED
stream & dd_;
#endif
if (stream.getArchiveState()==ArchiveStream::Save) {
bool b = false;
if (energies_) {
b = true;
stream & b;
stream & energies_->estrain_;
stream & energies_->eslip_;
}
else
stream & b;
} else {
bool b(false);
stream & b;
if (b) {
if (!energies_)
energies_ = NEWC(Energies());
stream & energies_->estrain_;
stream & energies_->eslip_;
}
}
stream & inheritanceField_;
stream & geomRecomp_;
stream & effectiveTranslationalStiffness_;
}
void ContactModelSmoothJoint::copy(const ContactModel *cm) {
ContactModelMechanical::copy(cm);
const ContactModelSmoothJoint *in = dynamic_cast<const ContactModelSmoothJoint*>(cm);
if (!in) throw std::runtime_error("Internal error: contact model dynamic cast failed.");
sj_kn(in->sj_kn());
sj_ks(in->sj_ks());
sj_fric(in->sj_fric());
sj_da(in->sj_da());
sj_state(in->sj_state());
sj_bns(in->sj_bns());
sj_bcoh(in->sj_bcoh());
sj_bfa(in->sj_bfa());
dip(in->dip());
sj_rmul(in->sj_rmul());
sj_large(in->sj_large());
#ifdef THREED
dd(in->dd());
#endif
sj_unorm(in->sj_unorm());
sj_A(in->sj_A());
sj_rad(in->sj_rad());
sj_gap(in->sj_gap());
sj_Un(in->sj_Un());
sj_Us(in->sj_Us());
sj_Fn(in->sj_Fn());
sj_Fs(in->sj_Fs());
isjFlip(in->isjFlip());
isjSliding(in->isjSliding());
if (in->hasEnergies()) {
if (!energies_)
energies_ = NEWC(Energies());
estrain(in->estrain());
eslip(in->eslip());
}
inheritanceField(in->inheritanceField());
effectiveTranslationalStiffness(in->effectiveTranslationalStiffness());
geomRecomp(in->geomRecomp());
}
QVariant ContactModelSmoothJoint::getProperty(uint i,const IContact *) const {
QVariant var;
switch (i) {
case kwKn: return sj_kn_;
case kwKs: return sj_ks_;
case kwFric: return sj_fric_;
case kwDA: return sj_da_/dDegrad; // Returned in degrees
case kwState: return sj_state_;
case kwTen: return sj_bns_;
case kwBCoh: return sj_bcoh_;
case kwBFA: return sj_bfa_/dDegrad; // Returned in degrees
case kwShear: return calcBSS();
case kwDip: return dip_/dDegrad; // Returned in degrees
#ifdef THREED
case kwDD: return dd_/dDegrad; // Returned in degrees
#endif
case kwRMul: return sj_rmul_;
case kwLarge: return sj_large_;
case kwFn: return sj_Fn_;
case kwFs: {
var.setValue(sj_Fs_);
return var;
}
case kwGap: return sj_gap_;
case kwNorm: {
var.setValue(sj_unorm_);
return var;
}
case kwArea: return sj_A_;
case kwRad: return sj_rad_;
case kwUn: return sj_Un_;
case kwUs: {
var.setValue(sj_Us_);
return var;
}
case kwSlip: return isjSliding_;
}
assert(0);
return QVariant();
}
bool ContactModelSmoothJoint::getPropertyGlobal(uint ) const {
return true;
}
bool ContactModelSmoothJoint::setProperty(uint i,const QVariant &v,IContact *) {
switch (i) {
case kwKn: {
if (!v.canConvert<double>())
throw Exception("sj_kn must be a double.");
double val = v.toDouble();
if (val<0.0)
throw Exception("Negative sj_kn not allowed.");
sj_kn_ = val;
updateEffectiveTranslationalStiffness();
return true;
}
case kwKs: {
if (!v.canConvert<double>())
throw Exception("sj_ks must be a double.");
double val = v.toDouble();
if (val<0.0)
throw Exception("Negative sj_ks not allowed.");
sj_ks_ = val;
updateEffectiveTranslationalStiffness();
return true;
}
case kwFric: {
if (!v.canConvert<double>())
throw Exception("sj_fric must be a double.");
double val = v.toDouble();
if (val<0.0)
throw Exception("Negative friction not allowed.");
sj_fric_ = val;
return false;
}
case kwDA: {
if (!v.canConvert<double>())
throw Exception("sj_da must be a double.");
sj_da_ = v.toDouble()*dDegrad; // Given in degrees
return false;
}
case kwState: {
if (!v.canConvert<uint>())
throw Exception("sj_state must be must be an integer between 0 and 3.");
int val = v.toInt();
if (val<0 || val>3)
throw Exception("The bond state must be an integer between 0 and 3.");
sj_state_ = val;
return false;
}
case kwTen: {
if (!v.canConvert<double>())
throw Exception("sj_ten must be a double.");
double val = v.toDouble();
if (val<0.0)
throw Exception("Negative bond normal (tensile) strength not allowed.");
sj_bns_ = val;
return false;
}
case kwBCoh: {
if (!v.canConvert<double>())
throw Exception("sj_coh must be a double.");
double val = v.toDouble();
if (val<0.0)
throw Exception("Negative bond system cohesion not allowed.");
sj_bcoh_ = val;
return false;
}
case kwBFA: {
if (!v.canConvert<double>())
throw Exception("sj_bfa must be a double.");
sj_bfa_ = v.toDouble()*dDegrad; // Given in degrees
return false;
}
case kwDip: {
if (!v.canConvert<double>())
throw Exception("dip must be a double.");
dip_ = v.toDouble()*dDegrad; // Given in degrees
if (!geomRecomp_) geomRecomp_ = true;
return true;
}
case kwDD: {
#ifdef THREED
if (!v.canConvert<double>())
throw Exception("ddir must be a double.");
dd_ = v.toDouble()*dDegrad; // Given in degrees
if (!geomRecomp_) geomRecomp_ = true;
#endif
return true;
}
case kwRMul: {
if (!v.canConvert<double>())
throw Exception("sj_rmul must be a double.");
double val = v.toDouble();
if (val<0.0)
throw Exception("Negative radius multiplier not allowed.");
sj_rmul_ = val;
if (!geomRecomp_) geomRecomp_ = true;
return false;
}
case kwLarge: {
if (!v.canConvert<bool>())
throw Exception("Large-strain flag must be a boolean.");
sj_large_ = v.toBool();
return false;
}
case kwFn: {
if (!v.canConvert<double>())
throw Exception("sj_fn must be a double.");
sj_Fn_ = v.toDouble();
return false;
}
case kwFs: {
if (!v.canConvert<DVect>())
throw Exception("sj_fs must be a vector.");
sj_Fs_ = v.value<DVect>();
return false;
}
case kwGap: {
if (!v.canConvert<double>())
throw Exception("sj_gap must be a double.");
sj_gap_ = v.toDouble();
return false;
}
// Following are read-only !
case kwNorm:
case kwRad:
case kwShear:
case kwUn:
case kwUs:
case kwSlip:
return false;
}
assert(0);
return false;
}
bool ContactModelSmoothJoint::getPropertyReadOnly(uint i) const {
switch (i) {
case kwNorm:
case kwRad:
case kwUn:
case kwUs:
case kwSlip:
case kwShear:
case kwArea:
return true;
default:
break;
}
return false;
}
bool ContactModelSmoothJoint::supportsInheritance(uint i) const {
switch (i) {
case kwKn:
case kwKs:
case kwFric:
return true;
default:
break;
}
return false;
}
QString ContactModelSmoothJoint::getMethodArguments(uint i) const {
QString def = QString();
switch (i) {
case kwBond:
return "gap";
case kwUnbond:
return "gap";
}
return def;
}
bool ContactModelSmoothJoint::setMethod(uint i,const QVector<QVariant> &vl,IContact *con) {
IContactMechanical *c(convert_getcast<IContactMechanical>(con));
switch (i) {
case kwSetForce: {
DVect gf = c->getGlobalForce();
if (isjFlip_)
gf *= -1.0;
sj_Fn_ = gf | sj_unorm_;
return false;
}
case kwBond: {
if (sj_state_ == 3) return false;
double mingap = -1.0 * limits<double>::max();
double maxgap = 0;
if (vl.at(0).canConvert<Double>())
maxgap = vl.at(0).toDouble();
else if (vl.at(0).canConvert<DVect2>()) {
DVect2 value = vl.at(0).value<DVect2>();
mingap = value.minComp();
maxgap = value.maxComp();
} else if (!vl.at(0).isNull())
throw Exception("gap value %1 not recognized in method bond in contact model %2.",vl.at(0),getName());
if ( sj_gap_ >= mingap && sj_gap_ <= maxgap) {
sj_state_ = 3;
return true;
}
return false;
}
case kwUnbond: {
if (sj_state_ == 0) return false;
double mingap = -1.0 * limits<double>::max();
double maxgap = 0;
if (vl.at(0).canConvert<double>())
maxgap = vl.at(0).toDouble();
else if (vl.at(0).canConvert<DVect2>()) {
DVect2 value = vl.at(0).value<DVect2>();
mingap = value.minComp();
maxgap = value.maxComp();
}
else if (!vl.at(0).isNull())
throw Exception("gap value %1 not recognized in method unbond in contact model %2.",vl.at(0),getName());
if ( sj_gap_ >= mingap && sj_gap_ <= maxgap) {
sj_state_ = 0;
return true;
}
return false;
}
}
return false;
}
double ContactModelSmoothJoint::getEnergy(uint i) const {
double ret(0.0);
if (!energies_)
return ret;
switch (i) {
case kwEStrain: return energies_->estrain_;
case kwESlip: return energies_->eslip_;
}
assert(0);
return ret;
}
bool ContactModelSmoothJoint::getEnergyAccumulate(uint i) const {
bool ret(false);
if (!energies_) return ret;
switch (i) {
case kwEStrain: return false;
case kwESlip: return true;
}
assert(0);
return ret;
}
void ContactModelSmoothJoint::setEnergy(uint i,const double &d) {
if (!energies_) return;
switch (i) {
case kwEStrain: energies_->estrain_ = d; return;
case kwESlip: energies_->eslip_ = d; return;
}
assert(0);
return;
}
bool ContactModelSmoothJoint::validate(ContactModelMechanicalState *state,const double &) {
assert(state);
const IContactMechanical *c = state->getMechanicalContact();
assert(c);
if (state->trackEnergy_)
activateEnergy();
// The radius multiplier has been set previously so calculate the sj_A_
// Need to do this regardless of whether or not the radius multiplier has been updated as this is the
// first place with the contact state to get the ball radii!
updateAreaAndNormal(state);
if (inheritanceField_ & sjKnMask)
updateKn(c);
if (inheritanceField_ & sjKsMask)
updateKs(c);
if (inheritanceField_ & sjFricMask)
updateFric(c);
updateEffectiveTranslationalStiffness();
return checkActivity(state->gap_);
}
void ContactModelSmoothJoint::updateAreaAndNormal(ContactModelMechanicalState *state) {
assert(state);
if (geomRecomp_) geomRecomp_ = false;
// Use the maximum value of the curvature here - not the min!
sj_rad_ = 1.0 / std::max(state->end1Curvature_.y(),state->end2Curvature_.y());
sj_rad_ = sj_rmul_ * sj_rad_;
#ifdef THREED
sj_A_ = dPi * sj_rad_ * sj_rad_;
sj_unorm_.rx() = sin(dip_) * sin(dd_);
sj_unorm_.ry() = sin(dip_) * cos(dd_);
sj_unorm_.rz() = cos(dip_);
#else
sj_A_ = 2.0 * sj_rad_; // Assumes thickness of 1 in 2D
sj_unorm_.rx() = sin(dip_);
sj_unorm_.ry() = cos(dip_);
#endif
DVect nc = state->getMechanicalContact()->getContact()->getNormal();
// Set the flip boolean so that the ordering is correct from side1 to side2
isjFlip_ = ( ((nc | sj_unorm_) >= 0.0 ) ? false : true );
}
static const QString kn("sj_kn");
bool ContactModelSmoothJoint::updateKn(const IContactMechanical *con) {
assert(con);
QVariant v1 = con->getEnd1()->getProperty(kn);
QVariant v2 = con->getEnd2()->getProperty(kn);
if (!v1.isValid() || !v2.isValid())
return false;
double kn1 = v1.toDouble();
double kn2 = v2.toDouble();
double val = sj_kn_;
if (kn1 && kn2)
sj_kn_ = kn1*kn2/(kn1+kn2);
else if (kn1)
sj_kn_ = kn1;
else if (kn2)
sj_kn_ = kn2;
return ( (sj_kn_ != val) );
}
static const QString ks("sj_ks");
bool ContactModelSmoothJoint::updateKs(const IContactMechanical *con) {
assert(con);
QVariant v1 = con->getEnd1()->getProperty(ks);
QVariant v2 = con->getEnd2()->getProperty(ks);
if (!v1.isValid() || !v2.isValid())
return false;
double kn1 = v1.toDouble();
double kn2 = v2.toDouble();
double val = sj_ks_;
if (kn1 && kn2)
sj_ks_ = kn1*kn2/(kn1+kn2);
else if (kn1)
sj_ks_ = kn1;
else if (kn2)
sj_ks_ = kn2;
return ( (sj_ks_ != val) );
}
static const QString fric("sj_fric");
bool ContactModelSmoothJoint::updateFric(const IContactMechanical *con) {
assert(con);
QVariant v1 = con->getEnd1()->getProperty(fric);
QVariant v2 = con->getEnd2()->getProperty(fric);
if (!v1.isValid() || !v2.isValid())
return false;
double fric1 = std::max(0.0,v1.toDouble());
double fric2 = std::max(0.0,v2.toDouble());
double val = sj_fric_;
sj_fric_ = std::min(fric1,fric2);
return ( (sj_fric_ != val) );
}
bool ContactModelSmoothJoint::endPropertyUpdated(const QString &name,const IContactMechanical *c) {
assert(c);
QStringList availableProperties = getProperties().simplified().replace(" ","").split(",",QString::SkipEmptyParts);
QRegExp rx(name,Qt::CaseInsensitive);
int idx = availableProperties.indexOf(rx) + 1;
bool ret=false;
if (idx<=0)
return ret;
switch(idx) {
case kwKn: { //sj_kn_
if (inheritanceField_ & sjKnMask)
ret = updateKn(c);
break;
}
case kwKs: { //sj_ks_
if (inheritanceField_ & sjKsMask)
ret =updateKs(c);
break;
}
case kwFric: { //sj_fric_
if (inheritanceField_ & sjFricMask)
updateFric(c);
break;
}
}
if (ret)
updateEffectiveTranslationalStiffness();
return ret;
}
void ContactModelSmoothJoint::updateEffectiveTranslationalStiffness() {
effectiveTranslationalStiffness_ = DVect2(sj_kn_,sj_ks_)*sj_A_;
}
bool ContactModelSmoothJoint::forceDisplacementLaw(ContactModelMechanicalState *state,const double &) {
assert(state);
if (geomRecomp_)
updateAreaAndNormal(state);
// Skip out if this should not be active
if (sj_large_ && state->gap_ > 0.0 && sj_state_ != 3) {
sj_Fn_ = 0.0;
sj_Fs_ = DVect(0.0);
sj_gap_ = 0.0;
sj_Un_ = 0.0;
sj_Us_ = DVect(0.0);
return false;
}
// Get the translational increment in the global system
CAxes localSys = state->getMechanicalContact()->getContact()->getLocalSystem();
DVect tInc = localSys.toGlobal(state->relativeTranslationalIncrement_);
// Now have the translational increment and the normal in the global coordinate system
// Compute the normal/shear displacement increments along the sj
if (isjFlip_)
tInc *= -1.0;
double nInc = tInc | sj_unorm_;
DVect sInc = tInc - sj_unorm_ * nInc;
sj_Un_ -= nInc;
sj_Us_ += sInc;
double nElInc(0.0);
DVect sElInc(0.0);
double g0 = sj_gap_, g1 = sj_gap_ + nInc;
sj_gap_ = g1;
if (!state->canFail_ || sj_state_ == 3 ) { // Bonded
nElInc = nInc;
sElInc = sInc;
} else {
if ( g0 <= 0.0 ) {
if ( g1 <= 0.0 ) {
nElInc = nInc;
sElInc = sInc;
} else { // g1 > 0.0
double xi = -g0 / (g1 - g0);
nElInc = nInc * xi;
sElInc = sInc * xi;
}
} else { // g0 > 0.0
if ( g1 >= 0.0 ) {
nElInc = 0.0;
sElInc.fill(0.0);
} else { // g1 < 0.0
double xi = -g0 / (g1 - g0);
nElInc = nInc * (1.0 - xi);
sElInc = sInc * (1.0 - xi);
}
}
}
double del_Fn = -sj_kn_ * sj_A_ * nElInc ;
sj_Fn_ += del_Fn ;
int slideChange(-1);
DVect sj_Fs_old = sj_Fs_;
if ( state->canFail_ && sj_state_ < 3 ) { // Coulomb sliding with dilation
if ( sj_Fn_ <= 0.0 ) {
sj_Fn_ = 0.0;
sj_Fs_.fill(0.0);
} else {
DVect del_Fs = sElInc * (-sj_ks_ * sj_A_);
sj_Fs_ += del_Fs;
double max_Fs = sj_Fn_ * sj_fric_;
double magFs = sj_Fs_.mag();
if ( magFs > max_Fs ) { // sliding
if (!isjSliding_) {
isjSliding_ = true;
slideChange = 0;
}
if ( sj_ks_ > 0.0 ) // dilation
sj_Fn_ += ( (magFs - max_Fs) / sj_ks_ ) * sj_kn_ * tan(sj_da_);
double rat = max_Fs / magFs ;
sj_Fs_ *= rat ;
} else {
if (isjSliding_) {
isjSliding_ = false;
slideChange = 1;
}
}
}
} else { // bonded behavior
if ( state->canFail_ && sj_Fn_ <= -sj_bns_ * sj_A_) {
sj_state_ = 1;
if (cmEvents_[fBondBreak] >= 0) {
FArray<QVariant,3> arg;
QVariant p1;
IContact * c = const_cast<IContact*>(state->getContact());
TPtr<IThing> t(c->getIThing());
p1.setValue(t);
arg.push_back(p1);
p1.setValue(sj_state_);
arg.push_back(p1);
p1.setValue(sj_bns_);
arg.push_back(p1);
IFishCallList *fi = const_cast<IFishCallList*>(state->getProgram()->findInterface<IFishCallList>());
fi->setCMFishCallArguments(c,arg,cmEvents_[fBondBreak]);
}
sj_Fn_ = 0.0;
sj_Fs_.fill(0.0);
} else {
DVect del_Fs = sElInc * (-sj_ks_ * sj_A_);
sj_Fs_ += del_Fs;
double magFs = sj_Fs_.mag();
double ss = calcBSS();
if ( state->canFail_ && magFs >= ss * sj_A_) { // break in shear
sj_state_ = 2;
if (cmEvents_[fBondBreak] >= 0) {
FArray<QVariant,3> arg;
QVariant p1;
IContact * c = const_cast<IContact*>(state->getContact());
TPtr<IThing> t(c->getIThing());
p1.setValue(t);
arg.push_back(p1);
p1.setValue(sj_state_);
arg.push_back(p1);
p1.setValue(ss);
arg.push_back(p1);
IFishCallList *fi = const_cast<IFishCallList*>(state->getProgram()->findInterface<IFishCallList>());
fi->setCMFishCallArguments(c,arg,cmEvents_[fBondBreak]);
}
if ( sj_Fn_ < 0.0 ) {
sj_Fn_ = 0.0;
sj_Fs_.fill(0.0);
} else { // was in compression // was in tension
double max_Fs = sj_Fn_ * sj_fric_ ;
if ( magFs > max_Fs) { // sliding, but no dilation
if (!isjSliding_) {
isjSliding_ = true;
slideChange = 0;
}
double rat = max_Fs / magFs ;
sj_Fs_ *= rat ;
} else {
if (isjSliding_ == true) {
isjSliding_ = false;
slideChange = 1;
}
}
}
}
}
}
if (slideChange >= 0 && cmEvents_[fSlipChange] >= 0) {
FArray<QVariant,3> arg;
QVariant p1;
IContact * c = const_cast<IContact*>(state->getContact());
TPtr<IThing> t(c->getIThing());
p1.setValue(t);
arg.push_back(p1);
p1.setValue(slideChange);
arg.push_back(p1);
IFishCallList *fi = const_cast<IFishCallList*>(state->getProgram()->findInterface<IFishCallList>());
fi->setCMFishCallArguments(c,arg,cmEvents_[fSlipChange]);
}
// Have updated the normal and shear forces so need to put them into the contact local
// coordinate system and update the forces
DVect Fj = sj_unorm_ * sj_Fn_ + sj_Fs_;
if (isjFlip_)
Fj *= -1.0;
// Return the correct activity status
bool isactive = true;
if (sj_large_ && state->gap_ > 0.0 && sj_state_ != 3) {
sj_Fn_ = 0.0;
sj_Fs_ = DVect(0.0);
sj_gap_ = 0.0;
sj_Un_ = 0.0;
sj_Us_ = DVect(0.0);
isactive = false;
}
// update energies
if (state->trackEnergy_) {
assert(energies_);
energies_->estrain_ = 0.0;
if (sj_kn_)
energies_->estrain_ = 0.5*sj_Fn_*sj_Fn_/sj_kn_;
if (sj_ks_) {
double smag2 = sj_Fs_.mag2();
energies_->estrain_ += 0.5*smag2 / sj_ks_;
if (isjSliding_) {
DVect avg_F_s = (sj_Fs_old + sj_Fs_)*0.5;
DVect u_s_el = (sj_Fs_ - sj_Fs_old) / sj_ks_;
energies_->eslip_ -= std::min(0.0,(avg_F_s | (sInc + u_s_el)));
}
}
}
return isactive ;
}
void ContactModelSmoothJoint::setForce(const DVect &v,IContact *c) {
// this is in the local coordinate system
CAxes localSys = c->getLocalSystem();
DVect globForce = localSys.toGlobal(v);
if (isjFlip_)
globForce *= -1.0;
sj_Fn_ = (sj_unorm_ | globForce);
sj_Fs_ = globForce - sj_unorm_ * sj_Fn_;
}
DVect ContactModelSmoothJoint::getForce(const IContactMechanical *c) const {
CAxes localSys = c->getContact()->getLocalSystem();
DVect Fj = sj_unorm_ * sj_Fn_ + sj_Fs_;
if (isjFlip_)
Fj *= -1.0;
DVect ret(localSys.toLocal(Fj));
return ret;
}
DAVect ContactModelSmoothJoint::getMomentOn1(const IContactMechanical *c) const {
DVect force = getForce(c);
DAVect ret(0.0);
c->updateResultingTorqueOn1Local(force,&ret);
return ret;
}
DAVect ContactModelSmoothJoint::getMomentOn2(const IContactMechanical *c) const {
DVect force = getForce(c);
DAVect ret(0.0);
c->updateResultingTorqueOn2Local(force,&ret);
return ret;
}
double ContactModelSmoothJoint::calcBSS() const {
if (sj_A_ > 0) {
double dSigma = sj_Fn_ / sj_A_;
return dSigma >= -sj_bns_ ? sj_bcoh_ + (tan(sj_bfa_) * dSigma)
: sj_bcoh_ + (tan(sj_bfa_) * (-sj_bns_));
}
else
return 0.0;
}
} // namespace itascaxd
// EoF
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| Was this helpful? ... | PFC 6.0 © 2019, Itasca | Updated: Nov 19, 2021 |