VM249

VM249
Gasket Material Under Uniaxial Compression Loading - 2D Analysis

Overview

Reference:

Any Nonlinear Material Verification Text.

Analysis Type(s):

Static analysis (ANTYPE = 0)

Element Type(s):

2D 4-Node Structural Solid Elements (PLANE182)

2D 8-Node or 6-Node Structural Solid (PLANE183)

2D 4-Node Gasket Elements (INTER192)

2D 6-Node Gasket Elements (INTER193)

Input Listing:

vm249.dat

Test Case

A thin interface layer of thickness t is defined between two planes of length l and width W placed on top of each other. The planes are constrained on the left and bottom edges and loaded with pressure P on the top. Determine the pressure-closure response for gasket elements.

Figure 423: Gasket Finite Element Model Geometry Sketch

Figure 424: Representative Finite Element Model

Material Properties

Geometric Properties

E = 104728E6 N/m²

ν = 0.21

Density = 7203 kg/m³

L = 1m

T = 0.02m

P1 = 44006400 pa

P2 =157147000 pa

Analysis Assumptions and Modeling Notes

A 2D plane stress analysis is performed first using INTER192 gasket elements and then using INTER193 gasket elements. In order to simulate the loading-unloading behavior of gasket material, the model is first loaded with a pressure P1 and unloaded and then loaded with a pressure P2 and unloaded. The pressure-closure responses simulated are compared to the material definition.

Results Comparison

	Target	Mechanical APDL	Ratio
Results Using INTER192 Elements:
Gasket Pressure and Closure at End of 1st Loading:
GK-PRES	0.440064E+08	0.440111E+08	1.000
GK-CLOS	0.406400E-03	0.406419E-03	1.000
Gasket Pressure and Closure at End of 2nd Loading:
GK-PRES	0.157147E+09	0.157207E+09	1.000
GK-CLOS	0.683260E-03	0.683417E-03	1.000
Results Using INTER193 Elements:
Gasket Pressure and Closure at End of 1st Loading:
GK-PRES	0.440064E+08	0.440111E+08	1.000
GK-CLOS	0.406400E-03	0.406419E-03	1.000
Gasket Pressure and Closure at End of 2nd Loading:
GK-PRES	0.157147E+09	0.157207E+09	1.000
GK-CLOS	0.683260E-03	0.683417E-03	1.000