CANCELLED Some issues in the modelling of fracture of aluminium alloys for structural applications
Cancelled
Event details
| Date | 12.11.2014 |
| Hour | 13:15 |
| Speaker |
Prof. Ahmed Benallal, UniverSud, France Bio: Director of Research at CRNS Head of LMT-Cachan Current research interest: Constitutive Equations for multiaxial loadings Metal matrix composites Material instabilities -Rate-independent materials -Rate-dependent materials -Thermomechanical couplings -Hydro-mechanical couplings Teaching activities: DEA "Procédés" (ENSAM Paris/ENS Cachan) Basic Continuum Mechanics for Processes Plasticity and Viscoplasticity -Phenomenological aspects -Thermodynamical considerations -Modelling |
| Location | |
| Category | Conferences - Seminars |
Unfortunately this seminar has been cancelled.
Aluminium alloys are used in structural applications where light weight is an important design criterion. Robust design and production of light but crashworthy structural components in aluminium involve development of alloys and manufacturing processes, structural design and crashworthiness analysis. Optimization of the structural components for strength, energy absorption and light weight, often requires utilization of the material to the verge of strain localization and material failure.
It is therefore important to establish accurate, efficient and robust models of material behaviour and fracture at various scales that can be used in the design of aluminium structures and thus reduce the need for extensive and costly test programs. The aim of this presentation is to illustrate some of the issues met in the modelling of the behaviour of aluminium alloys for structural applications with respect to strength and work-hardening, strain-rate sensitivity, plastic anisotropy and fracture.
The examples of AA5083-H116 and AA7075-T51 are used to illustrate how anisotropy, negative strain-rate sensitivity and dynamic strain ageing but also their different microstructures affect the fracture process. deformation bands in the first alloy and precipitation free zones in the second are emphasized.
Aluminium alloys are used in structural applications where light weight is an important design criterion. Robust design and production of light but crashworthy structural components in aluminium involve development of alloys and manufacturing processes, structural design and crashworthiness analysis. Optimization of the structural components for strength, energy absorption and light weight, often requires utilization of the material to the verge of strain localization and material failure.
It is therefore important to establish accurate, efficient and robust models of material behaviour and fracture at various scales that can be used in the design of aluminium structures and thus reduce the need for extensive and costly test programs. The aim of this presentation is to illustrate some of the issues met in the modelling of the behaviour of aluminium alloys for structural applications with respect to strength and work-hardening, strain-rate sensitivity, plastic anisotropy and fracture.
The examples of AA5083-H116 and AA7075-T51 are used to illustrate how anisotropy, negative strain-rate sensitivity and dynamic strain ageing but also their different microstructures affect the fracture process. deformation bands in the first alloy and precipitation free zones in the second are emphasized.
Practical information
- Informed public
- Free
- This event is internal
Organizer
- Prof. John Botsis