This is an extension of the Shock EOS Linear property. At high shock strengths nonlinearity in the shock velocity - particle velocity relationship is apparent, particularly for non-metallic materials. To account for this nonlinearity, the input calls for the definition of two linear fits to the shock velocity - particle velocity relationship; one at low shock compressions defined by Up > VB and one at high shock compressions defined by Up < VE.
The region between VE and VB is covered by a smooth interpolation between the two linear relationships as shown below.
In the input you are prompted for values of the parameters c1, c2, s1, s2, VE/Vo, VB/Vo, Γo and ρo. Then
Note: This equation of state can only be applied to solid bodies.
The Poisson's ratio is assumed to be zero when calculating effective strain.
A specific heat capacity should be defined with this property to allow the calculation of temperature.
Table 127: Input Data
|Relative Volume VB/V0||VB/V0||None|
|Relative Volume VE/V0||VE/V0||None|
This equation of state can only be used with solid elements.
Custom results variables available for this model: