Change of materials

[dpettersson]

I am using different kinds of materials when making simulations on a beam. I use steel as my datum material. Then I fill in the following data in the material properties dialog box.

Material 1 - STEEL1

Tensile Yield Stress: 460 MPa

Tensile Ultimate Stress: 670 MPa

Material 2 - STEEL2

Tensile Yield Stress: 550 MPa

Tensile Ultimate Stress: 760 MPa

When I am doing the exact same simulation with each of the materials I still get the exact same stresses. How can that be?

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[TomD.inPDX]

Even though the materials are different, given the same loads, the stress doesn't change.

Subsequent analysis should be performed to determine suitability of the material.

[dschenken]

Stress = Force/Area or Shear Force/Area.

Material is not involved in stress distribution, except as below. It's usually best if the stress in the material is lower than the elastic limit/tensile yield , except for tear-away or frangible applications.

Material is only involved when the material is subject to plastic deformation, where the elastic limit puts a cap on the stress or when the elastic modulus changes in conjunction with plastic deformation.