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#include "gestionversion.h"
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#pragma hdrstop
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#include "sl_critere.h"
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#include "sl_update.h"
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#include "sl_op_plastique.h"
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#include <math.h>
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//---------------------------------------------------------------------------
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#pragma package(smart_init)
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//---------------------------------------------------------------------------
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SL_CRITERE::SL_CRITERE(double sig_y,double eps_z,double n)
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{
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_SIG_Y=sig_y;
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_EPS_ZERO=eps_z;
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_N=n;
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}
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SL_CRITERE::~SL_CRITERE()
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{
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}
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//----------------------------------------------------------------------------------
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//Cette mÉthode calcul la contrainte équivalente de Hill et avec un choix approprié
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//des coeficients de Hill elle peu faire le calcul de la contrainte de Von Mises
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//----------------------------------------------------------------------------------
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double SL_CRITERE::get_ctr_equiv(double* sig)
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{
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double SIG_VM;
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SIG_VM=sqrt(0.5*((sig[0]-sig[1])*(sig[0]-sig[1])+(sig[0]-sig[2])*(sig[0]-sig[2])+(sig[1]-sig[2])*(sig[1]-sig[2]))+3*((sig[3]*sig[3])+(sig[4]*sig[4])+(sig[5]*sig[5])));
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return SIG_VM;
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}
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double SL_CRITERE::get_crit(double* sig_a,double alpha)
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{
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double sig_s=this->get_ecroui(alpha);
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double sig_equi=this->get_ctr_equiv(sig_a);
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double f=sig_equi-sig_s;
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return f;
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}
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//--------------------------------------------------------------------------------------
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double SL_CRITERE::get_ecroui(double alpha)
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{
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double sig_s=_SIG_Y*pow((_EPS_ZERO+alpha),_N);
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return sig_s;
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}
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void SL_CRITERE::get_derive_sigma(double* sig,double* df_sigma)
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{
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double S[6];
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double sig_equiv=this->get_ctr_equiv(sig);
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double trace=sig[0]+sig[1]+sig[2];
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for(int i=0;i<6;i++)
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{
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S[i]=sig[i];
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if(i<3)
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S[i]-=1./3*trace;
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}
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if(sig_equiv!=0.0)
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{
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double coef=3./(2*sig_equiv);
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df_sigma[0]=coef*S[0];
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df_sigma[1]=coef*S[1];
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df_sigma[2]=coef*S[2];
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df_sigma[3]=coef*2*S[3];
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df_sigma[4]=coef*2*S[4];
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df_sigma[5]=coef*2*S[5];
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}
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}
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//--------------------------------------------------------------------------------------
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//--------------------------------------------------------------------------------------
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//L'objectif de cette méthode est de calculer les termes mab de la amtrice M
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//--------------------------------------------------------------------------------------
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double SL_CRITERE::get_mab(double* Sab,const double* dfa,const double* dfb)
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{
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double mab;
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double df[6];
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SL_UPDATE update;
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update.remettre_a_zeros(df,6);
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mab=0.0;
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for(int i=0;i<6;i++)
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{
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for(int j=0;j<6;j++)
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{
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df[i]+=Sab[i*6+j]*dfb[j];
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}
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mab+=dfa[i]*df[i];
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}
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return mab;
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}
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//--------------------------------------------------------------------------------------
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