Journal
ACTA MECHANICA SOLIDA SINICA
Volume 26, Issue 2, Pages 111-120Publisher
SPRINGER
DOI: 10.1016/S0894-9166(13)60011-7
Keywords
dynamics; plastic; high temperature; alloy; impact testing
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Funding
- State 973 Program of China [2013CB03570]
- National Natural Science Foundation of China [11272259, 11002104, 10902090, 11021202]
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The compressive stress-strain relationships of 6061A1 alloy over wide temperatures and strain rates are investigated. The dynamic impact experiments are performed using an improved high temperature split Hopkinson pressure bar apparatus. The experimental results are compared with those obtained by the modified Johnson-Cook constitutive model. It is found that the dynamic mechanical behavior depends sensitively on temperature under relatively low strain rates or on strain rate at relatively high temperatures. The good agreement indicates that it is valid to adopt the parameter identification method and the constitutive model to describe and predict the mechanical response of materials.
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