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uniaxial compression of metals: data compilation


Dear Group,

I am looking for a compilation of data of the uniaxial compression test of metals at high temperature.

This type of test is commonly used to extract parameters for the equation
strain rate = function of stress (peak stress or steady state flow stress) and temperature
among them the activation energy for flow

I'd need, independently:

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Uniaxial compression of heterogeneous/cellular material (bone)


Dear colleagues,

I kindly ask for advice on the following problem:

I simulate the uniaxial compression of a heterogeneous cylinder representing bone. Thus, it is not the visible solid exterior rim of the bone, but represents a porous structure within the bone, so-called trabecular bone, see the figure underneath.

The simulation is done in ABAQUS. The sample contains 164175 elements of type C3D4. The heterogeneous, porous structure makes it impossible to use axisymmmetric elements. The constitutive behavior is ELASTIC.

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Inverse problem in beam bending, elastic-ideally plastic material

Dear iMechanica,

suppose you have a beam with a square cross-section, manufactured from an elastic-ideally plastic material.

Now apply a load that rises linearly in time, but is locally constant along the beam length. Upon sagging, the beam will develop a plastic zone beginning in the top and surface regions at mid-length.
This is the "straight" problem solved in Prager, Hodge: Theory of perfectly plastic solids, publisher: Springer

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Section points in user elements


Dear Group,

does anyone know how section points can be defined in user-defined elements UEL ?

I am trying to program my own beam element in ABAQUS. The beam element library does not provide a beam element with temperature as a degree of freedom which would come as an asset in our application.

Beam elements feature so-called section that provide the spatial resolution through the thickness. I cannot find any clue how this can be programmed. ABAQUS standard elements give results for strain, stress and the like at these section points.

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