Release Information
CMAS 4.1 Release Information
CMAS 4.1 has been released in July 2013.
In this version, new element formulation for solving stable super-elastic large deformation problems has been added.

【CMAS 4.1: Storage location】
Top Category > CMAS
- ・FAQ No.126428 : CMAS 4.1 Install Media
【Notes】
CMAS 4.1: Release Highlights
Non-linear version: Support for large deformation problems by the new element formulation
In general, composite materials including fiber-based are made up of microstructures that are mixed materials of widely different rigidity. When performing a numerical material test on those formations, and observing them in the micro-scale, it is possible to be localized from several tens of percent (10%, 20%, 30%...) to several hundreds of percent (100%, 200%, 300%...) of large strain near the material interface even when apparent strain is as small as a few percent.
Thus, the element is collapsed, and analysis was not able to be performed reliably. In this version, we focus on the advanced element formulation *1, which was developed by Reese et al. at Hannover University in Germany, and it has been implemented using a user subroutine of Ansys. Accordingly, our program has acquired more stable convergence than ever before on the large deformation problems of super-elastic.
Analysis Example: Large strain numerical material test of fiber-based composite materials using advanced element formulation.
Reference:
*1 S. Reese, P. Wriggers; "A stabilization technique to avoid hourglassing in finite elasticity";
International Journal for Numerical Methods in Engineering; Vol. 48, 79-109 (2000)
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