Product: Abaqus/Explicit
Benefits: You can now define an effective area of a surface on the fluid cavity for fluid exchange/leakage that depends on the material state in the underlying elements on the surface as well as define a mass flow rate and/or heat energy flow rate using user subroutines.
Description: User subroutine VUFLUIDEXCHEFFAREA can be used to define an effective leakage area if leakage needs to be modeled as a function of the material state in the underlying elements of the specified surface. For example, this subroutine can be used to define the leakage area at an element level for modeling fabric permeability in uncoated airbags where the leakage can vary locally depending on the strains in the yarn directions and the angle between the fabric yarns. User subroutine VUFLUIDEXCH can be used to define mass flow rate and/or heat energy flow rate for fluid exchange when built-in fluid exchange property types cannot satisfactorily model the mass/heat energy flow.
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