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ATC version 2.0, date: Nov20

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git-svn-id: svn://svn.icms.temple.edu/lammps-ro/trunk@12757 f3b2605a-c512-4ea7-a41b-209d697bcdaa
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jatempl
2014-11-20 18:59:03 +00:00
parent 2fecb0f4b8
commit ac5973073f
69 changed files with 5895 additions and 2159 deletions
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20
lib/atc/FE_Element.cpp
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@ -178,6 +178,26 @@ static const double localCoordinatesTolerance = 1.e-09;
xi(1) = J2/J;
xi(2) = J3/J;
}
else if (projectionGuess_ == TWOD_ANALYTIC) {
// assume x-y planar and HEX8
double x0 = x(0), y0 = x(1);
double X[4] = {eltCoords(0,0),eltCoords(0,1),eltCoords(0,2),eltCoords(0,3)};
double Y[4] = {eltCoords(1,0),eltCoords(1,1),eltCoords(1,2),eltCoords(1,3)};
double c[3]={0,0,0};
c[0] = y0*X[0] - y0*X[1] - y0*X[2] + y0*X[3] - x0*Y[0] + (X[1]*Y[0])*0.5 + (X[2]*Y[0])*0.5 + x0*Y[1] - (X[0]*Y[1])*0.5 - (X[3]*Y[1])*0.5 + x0*Y[2] - (X[0]*Y[2])*0.5 - (X[3]*Y[2])*0.5 - x0*Y[3] + (X[1]*Y[3])*0.5 + (X[2]*Y[3])*0.5;
c[1] = -(y0*X[0]) + y0*X[1] - y0*X[2] + y0*X[3] + x0*Y[0] - X[1]*Y[0] - x0*Y[1] + X[0]*Y[1] + x0*Y[2] - X[3]*Y[2] - x0*Y[3] + X[2]*Y[3];
c[1] = (X[1]*Y[0])*0.5 - (X[2]*Y[0])*0.5 - (X[0]*Y[1])*0.5 + (X[3]*Y[1])*0.5 + (X[0]*Y[2])*0.5 - (X[3]*Y[2])*0.5 - (X[1]*Y[3])*0.5 + (X[2]*Y[3])*0.5;
double xi2[2]={0,0};
int nroots = solve_quadratic(c,xi2);
if (nroots == 0) throw ATC_Error("no real roots in 2D analytic projection guess");
double xi1[2]={0,0};
xi1[0] = (4*x0 - X[0] + xi2[0]*X[0] - X[0] + xi2[0]*X[0] - X[0] - xi2[0]*X[0] - X[0] - xi2[0]*X[0])/(-X[0] + xi2[0]*X[0] + X[0] - xi2[0]*X[0] + X[0] + xi2[0]*X[0] - X[0] - xi2[0]*X[0]);
xi1[1] = (4*x0 - X[0] + xi2[0]*X[0] - X[0] + xi2[0]*X[0] - X[0] - xi2[0]*X[0] - X[0] - xi2[0]*X[0])/(-X[0] + xi2[0]*X[0] + X[0] - xi2[0]*X[0] + X[0] + xi2[0]*X[0] - X[0] - xi2[0]*X[0]);
// choose which one gives back x
xi(0) = xi1[0];
xi(1) = xi2[0];
xi(2) = 0;
}
}