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Questions tagged [elastic-modulus]

66 questions
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Rule of Mixtures calculation

I do not understand something about the "rule of mixtures". Specifically, between upper bound elastic modulus and lower bound elastic modulus calculations, I seriously do not understand what value to choose based on transverse or longitudinal…
user586228
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Is there a rubber material with an elastic modulus lower than 1 MPa?

I'm looking for an elastic material (e.g., a rubber), whose tangential elastic modulus E is lower than 1 MPa (0.5 MPa would be enough). Anyone has an idea of which kind of rubber could fit this specification? I need a tube (16-25 mm diameter, and…
Fabio Fuiano
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Why are Lamé parameters different in two dimensions?

The Wikipedia article has a completely separate table for Lamé parameter conversions in the 2D case. Philosophically, why is there even a different table for 2D if these parameters are meant to express intrinsic material qualities? Practically, how…
Mark
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Can the Elastic Modulus of an isotropic material be different in Tension and in compression?

I was conducting a FEA analysis of a symmetric isotropic structure under a loading condition. I will not mention the material I was using. Under that loading, one part of the structure was in tension and other in compression. When I reversed the…
Rameez Ul Haq
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Is the young's modulus of a braided rope stronger than the sum of its parts?

I know that if I have a thin rope of Young's modulus Y, then getting n of these ropes and holding them in parallel gives a Young's modulus of nY. If I was to braid/weave them, does this affect the Young's modulus?
Tweej
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Database of elastic constants

I'm interested in locating a database containing the elastic constants (the tensor matrix) for a variety of materials (preferably for a variety of symmetry classes). I don't have a particular material in mind, so just some general list would be very…
John
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Stiffness Tensor in Two Dimensions

I understand plane strain/stress relations are typically utilized for 2D materials. I was wondering if we consider a 2D material acting in a 2D space, would we have a stiffness matrix such as \begin{equation*} \left[ \begin{array}{ccc} C_{1111} &…
John
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Youngs modulus in ASTM specification A36

In ASTM A36 I cannot find a single mention of the Youngs modulus of the material. It does mention the tensile strength and yield point among other things. Where is such information normally indicated in ASTM specifications?
Stephen Jacob
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Plane Strain in Anisotropic Materials

I'm looking into plane strain and I'm a little confused about the concept. If we assume the material is much longer in the $z$-direction, the typical assumptions I see are \begin{equation*} |\varepsilon_{12}|, |\varepsilon_{13}|, |\varepsilon_{33}|…
John
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