artisynth.core.materials

Class FemMaterialTest

java.lang.Object

maspack.util.UnitTest

artisynth.core.materials.FemMaterialTest

public class FemMaterialTest
extends UnitTest

Tests FemMaterials by checking that the computed tangent matrix is consistent with the value determined via numeric differentiation. Background material is provided in Bonet and Wood, "Nonlinear Continuum Mechanics for Finite Element Analysis".

Method Summary

Modifier and Type	Method and Description
java.util.ArrayList<Matrix3d>	getFTests(MaterialBase mat)
static void	main(java.lang.String[] args)
void	test() Test method executed by runtest().
void	testIncompressible(IncompressibleMaterialBase mat, double tol)
void	testLinear(LinearMaterialBase mat, double tol) Performs tests on a linear material for a given deformation.
void	testLinear(LinearMaterialBase mat, Matrix3d F0, double tol)
void	testStress(MaterialBase mat, double tol) Tests a material by comparing the computed stress matrix with the numeric derivative of the same.
void	testStress(MaterialBase mat, Matrix3d F0, double tol)
void	testTangent(MaterialBase mat, double tol) Tests a material by comparing the computed tangent matrix with the numeric derivative of the same.
void	testTangent(MaterialBase mat, Matrix3d F0, double tol)

Methods inherited from class maspack.util.UnitTest

check, checkEquals, checkEquals, checkEquals, checkEquals, checkEquals, checkEquals, checkEquals, checkEquals, checkNormedEquals, checkNormedEquals, getSilent, printUsageAndExit, runtest, setSilent

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Detail

getFTests

public java.util.ArrayList<Matrix3d> getFTests(MaterialBase mat)

testLinear

public void testLinear(LinearMaterialBase mat,
                       double tol)

Performs tests on a linear material for a given deformation.

Parameters:

mat - material to test

tol - tolerance for computing tests.

testTangent

public void testTangent(MaterialBase mat,
                        double tol)

Tests a material by comparing the computed tangent matrix with the numeric derivative of the same.

Parameters:

mat - material to test

tol - tolerance by which the computed and numeric tangents should match. Typically, this should be around 1e-8.

testStress

public void testStress(MaterialBase mat,
                       double tol)

Tests a material by comparing the computed stress matrix with the numeric derivative of the same.

Parameters:

mat - material to test

tol - tolerance by which the computed and numeric stresses should match. Typically, this should be around 1e-8.

testLinear

public void testLinear(LinearMaterialBase mat,
                       Matrix3d F0,
                       double tol)

testTangent

public void testTangent(MaterialBase mat,
                        Matrix3d F0,
                        double tol)

testStress

public void testStress(MaterialBase mat,
                       Matrix3d F0,
                       double tol)

testIncompressible

public void testIncompressible(IncompressibleMaterialBase mat,
                               double tol)

test

public void test()

Test method executed by runtest().

Overrides:

test in class UnitTest

main

public static void main(java.lang.String[] args)