Add linear elastic example

[koubaa]

I use code like this elsewhere (I didn't test that this works, but it should at least be very close)

from ansys.materials.manager._models import Constant 
from ansys.materials.manager.material import Material
from ansys.materials.manager.util.matml.matml_from_material import MatmlWriter

e = 1e11 #young's modulus
p = 0.44 #possion's ratio
material = Material("MaterialName", material_id=1)
material.models.append(Constant("young's modulus x direction", e))
material.models.append(Constant("young's modulus y direction", e))
material.models.append(Constant("young's modulus z direction", e))
material.models.append(Constant("poisson's ratio xy", p))
material.models.append(Constant("poisson's ratio yz", p))
material.models.append(Constant("poisson's ratio xz", p))
matml_writer = MatmlWriter([material])
with open("matml.xml", "w") as f:
    matml_writer.write(f)

[koubaa]

@rajesh1359 FYI

[rs-bh-n]

Thanks Mohamed, this worked with these changes :

e = 2.3e11 #young's modulus
p = 0.4 #possion's ratio
s = 9.0e9
material = Material("Copper5", material_id=1)
material.models.append(Constant("young's modulus x direction", e))
material.models.append(Constant("young's modulus y direction", e))
material.models.append(Constant("young's modulus z direction", e))
material.models.append(Constant("poisson's ratio xy", p))
material.models.append(Constant("poisson's ratio yz", p))
material.models.append(Constant("poisson's ratio xz", p))
material.models.append(Constant("Shear Modulus XY", s))
material.models.append(Constant("Shear Modulus XZ", s))
material.models.append(Constant("Shear Modulus YZ", s))
matml_writer = MatmlWriter([material])
filepath = r"D:\S\matml5.xml"
matml_writer.export(filepath)