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Download LS-DYNA Structured User's Manual Version 960
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(Piecewise Linear Isotropic Plasticity) Material Type 24 Material Type 24 (Piecewise Linear Isotropic Plasticity) Columns 1-10 Quantity Card 3 Format Young’s modulus E10.0 11-20 Strain rate parameter, C E10.0 21-30 Strain rate parameter, p E10.0 31-40 Formulation for rate effects: EQ.0.0: Scale yield stress (default) EQ.1.0: Viscoplastic formulation E10.0 1-10 Card 4 Poisson’s ratio E10.0 1-10 Card 5 Yield stress E10.0 Load curve ID or Table ID. The load curve ID defines effective stress versus effective plastic strain. Cards 7 and 8 are ignored with this option. The table ID, see Figure 3.9, defines for each strain rate value a load curve ID giving the stress versus effectiveplastic strain for that rate. The stress versus effective plastic strain curve for the lowest value of strain rate is used if the strain rate falls below the minimum value. Likewise, the stress versus effective plastic strain curve for the highest value of strain rate is used if the strain rate exceeds the maximum value. The strain rate parameters on card 3, the curve ID on card 6, and cards 7 and 8 are ignored if a Table ID is defined. E10.0 Tangent modulus, ignored if the stress-strain curve is defined below E10.0 11-20 Failure flag: LT.0.0: User defined failure subroutine is called to determine failure EQ.0.0: Failure is not considered. This option is recommended if failure is not of interest since many caluculations will be saved. GT.0.0: Plastic strain to failure. When the plastic strain reaches this value, the element is deleted from the calculation. E10.0 21-30 Time step size for automatic element deletion E10.0 31-40 Load curve number to scale yield stress to account for strain rate effects. E10.0 11-20 1-10 Card 6 LS-DYNA Version 960 3.24.1m
