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Knowledge Transfer, Materials, Modelling

Towards the next generation of  fast dynamics computational fracture solvers in Engineering

A collaboration between Swansea University and Cardiff University

 


 

 

computational-fracture-solvers.jpg

 Results of modelling high velocity Impact with plastic deformation.

 


 

Applications

Modern commercial software tools, developed on the basis of the classical displacement-based formulation for low order elements in conjunction with explicit Newmark-type time integrators, present a series of critical drawbacks, including:

  1. volumetric and shear locking and
  2. reduced order of convergence for strains and stresses;
  3. spurious oscillations in the vicinity of sharp gradients or shocks.

These shortcomings are overcome by a new three dimensional mixed formulation for the analysis of large strain solid explicit dynamics, recently published by the Principal Investigator and colleagues. This can be used to model crashes, impacts, fractures, ruptures and explosions, and is therefore applicable to the manufacturing, defence, automotive and aerospace industries.

 


 

Objectives

The objective of this project is the development, implementation and industrial bench marking of a new computational framework for the modelling of dynamic fracture in realistic multi-physics scenarios. This new methodology enables fluid and solid phases to be modelled with the same new mixed formulation. It can thus easily be extended to a variety of multi-scale, multi-phase and multi-physics engineering problems of interest to Industry.

 


 

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