VM250VM250Gasket Material Under Uniaxial Compression Loading - 3-D AnalysisOverviewReference: Any Nonlinear Material Verification Text.AnalysisType(s):

Static analysis (ANTYPE = 0)

ElementType(s):

3-D 8-Node Structural Solid Elements (SOLID185)3-D 20-Node Structural Solid Elements (SOLID186)3-D 8-Node Gasket Elements (INTER195)3-D 20-Node Gasket Elements (INTER194)

Input Listing: vm250.datTest CaseA thin interface layer of thickness t is defined between two blocks of length l, widthW, and height H placed on top of each other. The blocks are constrained on the left,bottom, and back faces and loaded with pressure P on the top face. Determine thepressure-closure response for gasket elements.Figure 250.1: Gasket Finite Element Model Geometry Sketch

Figure 250.2: Representative Finite Element Model

Material Properties Geometric Properties Loading

E = 104728E6 N/m2 = 0.21Density = 7203 kg/m3

L = 1 mW = 1 mH = 1 mT = 0.02 m

P1 = 44006400 paP2 =157147000 pa

Analysis Assumptions and Modeling NotesA 3-D analysis is performed first using 4 x 4 INTER195 gasket elements and thenusing 4 x 4 INTER194 gasket elements. In order to simulate the loading-unloadingbehavior of gasket material, the model is first loaded with a pressure P1 andunloaded and then loaded with a pressure P2 and unloaded. The pressure-closureresponses simulated are compared to the material definition.Results Comparison

Target Mechanical APDL RatioResults Using INTER195 Elements:Gasket Pressure and Closure at End of 1st Loading:GK-PRES 0.440064E+08 0.440064E+08 1.000GK-CLOS 0.406400E-03 0.406400E-03 1.000Gasket Pressure and Closure at End of 2nd Loading:GK-PRES 0.157147E+09 0.157147E+09 1.000GK-CLOS 0.683260E-03 0.683260E-03 1.000Results Using INTER194 Elements:Gasket Pressure and Closure at End of 1st Loading:GK-PRES 0.440064E+08 0.440064E+08 1.000GK-CLOS 0.406400E-03 0.406400E-03 1.000Gasket Pressure and Closure at End of 2nd Loading:GK-PRES 0.157147E+09 0.157147E+09 1.000GK-CLOS 0.683260E-03 0.683260E-03 1.000

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