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SUMMARY:CANCELLED Some issues in the modelling of fracture of aluminium al
 loys for structural applications
DTSTART:20141112T131500
DTSTAMP:20260501T195604Z
UID:b16ec9396aeff59ea86881f20be15ec0918f7d493cefd686d07f0eb0
CATEGORIES:Conferences - Seminars
DESCRIPTION:Prof. Ahmed Benallal\, UniverSud\, France\nBio: Director of Re
 search at CRNS\nHead of LMT-Cachan\nCurrent research interest:\nConstituti
 ve Equations for multiaxial loadings\nMetal matrix composites\nMaterial in
 stabilities\n-Rate-independent materials\n-Rate-dependent materials\n-Ther
 momechanical couplings\n-Hydro-mechanical couplings\nTeaching activities:\
 n  \nDEA "Procédés" (ENSAM Paris/ENS Cachan)\nBasic Continuum Mechanic
 s for Processes\nPlasticity and Viscoplasticity\n-Phenomenological aspects
 \n-Thermodynamical considerations\n-Modelling\nUnfortunately this seminar 
 has been cancelled.\nAluminium alloys are used in structural applications 
 where light weight is an important design criterion. Robust design and pro
 duction of light but crashworthy structural components in aluminium involv
 e development of alloys and manufacturing processes\, structural design an
 d 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.
 \nIt is therefore important to establish accurate\, efficient and robust m
 odels of material behaviour and fracture at various scales that can be use
 d in the design of aluminium structures and thus reduce the need for exten
 sive and costly test programs. The aim of this presentation is to illustra
 te some of the issues met in the modelling of the behaviour of aluminium a
 lloys for structural applications with respect to strength and work-harden
 ing\, strain-rate sensitivity\, plastic anisotropy and fracture.\nThe exam
 ples 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 emphasiz
 ed.
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STATUS:CANCELLED
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