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failure strain PowerPoint Presentation
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failure strain

failure strain

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failure strain

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  1. Motivation: Why is a temperature increase showing failure strains in opposite directions for ductile metals? failure strain failure strain 6xxx Al Alloy 5xxx Al Alloy 2008 MSU Workshop June 23-25, 2008

  2. Suggested Working Hypothesis T1 < T2 > T1 T2 s s e 1. f=hvc and 2. f(T)=h(T)v(T)c(T) where f=void vol. fraction=damage T=temperature h=nucleation (#/vol) v=single void growth (vol) c=void coalescence or interaction and 3. f, h, v, and c operate as internal state variables f f h h v v c c 2008 MSU Workshop June 23-25, 2008

  3. 304L SS picture illustrates void nucleation, growth, and coalescence as separate mechanisms 2008 MSU Workshop June 23-25, 2008