Crack propagation modelling for fracture mechanics

Paul Boughton
Simmetrix is releasing Simulation Modeling Suite 7.0 with advanced modelling functionality for fracture mechanics. The Geomsim Advanced and Meshsim Advanced modules within Simulation Modeling Suite 7.0 provide access to state-of-the-art modelling for inserting crack geometry and modified crack geometry due to crack propagation.

Fracture mechanics, including the analysis of crack behaviour, is a growing area of simulation application. Key issues associated with effective modelling of cracks include modelling the initial crack geometry and re-meshing to account for the calculated crack growth in 3D. The newly released capabilities are said to offer a breakthrough technology to enable effective and efficient modelling of cracks as part of the simulation model.

This new modelling approach provides for the definition of a crack surface or multiple crack surfaces in a previously meshed model. The mesh may have been created by Simmetrix' Meshsim module or by a different mesh generation tool. The local area around the specified crack(s) is adjusted and a local structured crack tip mesh inserted at the crack front with transitioning to the remainder of the initial mesh.

Crack propagation from the analysis data can then be used to grow the crack geometry in 3D space. The specified crack growth is not limited to planar growth and supports non-planar growth along the crack front. After the new crack front geometry is defined, the local area around the modified crack(s) is adjusted and a local structured crack tip mesh inserted at the non-planar crack front. This process is then repeated as appropriate to model the calculated three-dimensional crack growth.

The crack insertion and crack propagation modelling are provided through the Geomsim Advanced and Meshsim Advanced modules within the Simulation Modeling Suite. The Simulation Modeling Suite provides a toolkit approach for simulation modelling with an object-oriented API interface; it is currently licensed by a broad range of commercial independent software vendors and internal development organisations.

For more information, visit www.simmetrix.com

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