SIMLab material model library
Some principal outcomes of CRI SIMLab are numerical implementations of constitutive models and failure criteria. Some of the models have been initiated in past projects and refined through SIMLab projects, while other models have been initiated within SIMLab.
Metal plasticity model based on Hosford-class anisotropic yield criteria
Yld89 and Yld2000-2D for realistic and direct FE-based prediction of
instability and fracture in sheet metals.
Key applications: Shell based forming, formability/fracture and crashworthiness analysis of metallic materials, components and structures.
Metal plasticity model based on Yld2004-18p anisotropic yield criterion for realistic and direct FE-based prediction of instability and fracture in sheet or thick-walled metals.
Key applications: Shell- and brick-based forming, formability/fracture and crashworthiness analysis of metallic materials, components and structures.
Johnson-Cook metal plasticity model approach with modifiedstrain-rate terms, added strain hardening term and fracture criteria.
Key applications: Numerical analysis of impact and projectile/fragment penetration analysis.
Modified Holmquist-Johnson-Cook material model for solid geo-materials.
Key applications: Numerical analysis of impact, and projectile/fragment
penetration analysis for e.g. concrete, rocks and ceramic materials.
Crushable foam model based on the yield criterion of Desphande-Fleck with stress- and strain-based fracture criteria.
Key applications: Mechanical analysis of crushable foam materials
Model for high-pressure die cast aluminium and magnesium with coupling to the MagmaSoft casting simulation tool, for efficient and realistic incorporation of process effects and probabilistic fracture.
Key applications: Fracture and crashworthiness analysis of highpressure die castings.
Polymer model - Refined modelling approach based on the work of Boyce and others, incorporating finite strain elasticity, a pressure dependent yield criterion (Raghava), and a non-associated plastic flow rule.
Key applications: Mechanical analysis of thermoplastic components.
HAZ model for welded aluminium structures with option of obtaining material parameters through welding simulations using WELDSIM (mapping or position-dependent properties).
Key applications: Shell-based fracture and crashworthiness analysis of welded aluminium structures.
Tailored development on the associated solution techniques further covers:
- Non-local plastic thinning: Regularization technique applicable for shell-element analysis using small elements (in particular,less than the shell thickness).
- Non-local plastic instability criterion for detection of incipient unstable thinning i.e. for formability predictions.
- Technologies for proper and efficient crack propagation modelling: Node splitting and fission adaptivity.
- Point connector model for self-piercing rivets.