OS-E: 0165 Contact Smoothing With Two Concentric Rings
Contact smoothing is useful to increase accuracy of the contact solution. An enforced
displacement to push two concentric rings toward each other to engage the contact is used. The
usage of NLOUT entry allows you to study the progression of SPC force over
successive increments.
Figure 1. FE Model
Model Description
Conduct a Large Displacement Nonlinear Analysis solution with contact smoothing. Enforced
displacement is applied on the center of the RBE2 and the inner ring is
pushed on to the outer ring. The outer surface of the outer ring is constrained in
translation (Figure 1).
FE Model
Elements Types
CHEXA
CPENTA
The linear material properties are:
MAT1
Young’s Modulus
2.1E+5
Poisson's Ratio
0.3
Large Displacement Nonlinear Static Analysis
NLSTAT
LGDISP
Nonlinear Parameters
NLPARM
NLOUT
NLADAPT
Results
The SPCFORCE results are shown in Figure 2
for both cases, with and without smoothing.
Note: The activation of contact smoothing
improves the SPC Force results.
Figure 2. (a) Smoothing is Active; (b) Smoothing is Inactive. SPC Force Output Plot Shows a Smoother Curve with Contact Smoothing Turned On
