MSC software simulates nonlinear behaviors

May 7, 2013  by  

MSC Software Corporation announced Marc 2013, software that helps engineers test the nonlinear behavior of complex designs and materials. It includes new capabilities for contact and failure analysis as well as new material models and enhancements for the analysis of manufacturing processes.

Contact analysis

The new version is said to feature improved contact analysis capabilities, including tube-in-tube and beam-in-tube behavior, with automatic expansion of pipe and cross-section beam elements to capture their behavior during contact with rigid and deformable elements. Interference fit is now easier and more flexible, and segment-to-segment contact support has been expanded to multi0physics.

The new Bergström-Boyce model can be used to simulate the time-dependent, large strain viscoelastic behavior of hyperelastic materials, and it can be combined with damage models to represent the permanent set of the material.
Viscoelastic material properties in a harmonic analysis can be used to compute stiffness and damping properties as a function of frequency, and is supported for linear elastic and hyperelastic material models available in Marc. Thermo-rheologically-simple behavior of these materials can also be specified to include temperature dependence of storage and loss moduli.

Failure analysis

A new Continuum Damage Model simulates the three stages of damage evolution – void generation, growth, and coalescence. It expands the current damage modeling capability using Gurson-Tvergaard-Needleman formulation and uses fewer physical parameters to represent damage evolution. This capability helps engineers to more accurately identify damage accumulation and possible failure in manufacturing processes like sheet forming and stamping operations.

Several enhancements in crack propagation studies include general crack propagation in 3-D solids, and better locally refined, automatic global remeshing capability to provide finer mesh at crack tip. Easy placement of crack tip surfaces in an arbitrary location, without concerning about splitting element faces reduces modeling effort and enables users to perform crack initiation and propagation studies faster, and more accurately.

Schemes for higher productivity

Marc’s manufacturing process analysis capabilities have been enhanced with improved support for multistage forming.
The new capability supports simulation of chained analysis for multi-stage forming processes in a very easy manner. Users can move the internal variables from one simulation to the next easily and update the contact tools/dies. Prior results can also be re-used so that the state of the model from the previous analysis is retained, without the need for large restart files, leading to more flexibility and reduced computer resources requirements.

A new multi-physics capability enables coupling of structural analysis with a magnetodynamic-thermal analysis. Using this methodology, precision manufacturing engineers can determine the parameters to control the heat of a sheet, jet blade, or other work-piece induced by induction heating.

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