Mechanical APDL Structural Analysis Guide
Figure 8.5: Load Steps, Substeps, and Time 0 0. 5 1. 0 1.5 1. 75 2. 0 Time Loadstep 2 Loadstep 1 Loadstep Substep Substeps Load ...
Figure 8.6: Nonconservative (Path-Dependent) Behavior Plastichingeformshere F F u 1 2 3 1 2 3 8.2.2. Substeps When using multipl ...
Figure 8.7: Load Directions Before and Aft er Deflection Acceleration: NodalForce: ElementPressure: L DBf Df ...
8.2.5. Nonlinear Transient Analyses The procedure for analyzing nonlinear transient behavior is similar to that used for nonline ...
Even though stress stiffening theory assumes that an element's rotations and strains are small, in some structural systems (such ...
Topics covering the following general categories of nonlinear material models are available: 8.4.1.1. Plasticity 8.4.1.2. Hypere ...
Tools are available to help you determine the coefficients for all of the hyperelastic options defined by TB,HYPER. The TBFT com ...
TBDATA,2,2 !Define α 1 TBDATA,3,-0.250152 !Define μ 2 TBDATA,4,-2 !Define α 2 TBDATA,5,6.93063E-5 !Define incompressibility para ...
8.4.1.2.6. Gent Hyperelastic Option (TB,HYPER,,,,GENT ) The Gent option (TB,HYPER,,,,GENT) has an applicable strain level of up ...
deformation for which you may be interested. For these reasons, a high parameter value is not recom- mended. The following examp ...
Combined uniaxial tension and compression data can be used to model material behavior that is different in tension than in compr ...
Data outside the experimental strain values are assumed to be constant; therefore, all experimental data should cover the simula ...
Additional Information For a description of the material constants required for this option, see Bergstrom-Boyce Material in the ...
8.4.1.5. Anisotropic Hyperelasticity Material Model You can use anisotropic hyperelasticity to model the directional differences ...
Figure 8.10: Stress Relaxation and Creep ResultingForce Applied Displacement (a)Stressrelaxation Primary Secondary Tertiary Rupt ...
You can input other creep expressions using the user programmable feature and setting TBOPT = 100. You can define the number of ...
to examine the effect of the time increment on the results carefully because the program does not enforce any creep ratio contro ...
Figure 8.12: Viscoplastic Behavior in a Rolling Operation Rate-Dependent Plasticity (Viscoplasticity) The TB,RATE command option ...
8.4.1.9. Viscoelasticity Viscoelasticity is similar to creep, but part of the deformation is removed when the loading is taken o ...
8.4.1.10. Swelling Certain materials respond to neutron flux by enlarging volumetrically, or swelling. T o include swelling effe ...
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