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Micro-macro Analysis of the Notch Tip Radius and Loading Rate Dependences of the Dynamic Crack Initiation Toughness during a High Transient Dynamic crack Growth Experiment
Last modified: 2013-05-07
Abstract
The risks due to crack propagation under dynamic loading are still difficult to
estimate. Unlike quasi-static cases, where the loading and crack position can be
easily established, in dynamic impact cases, loading conditions, propagation
parameter variations and exact crack positions are difficult to control. The
determination of relevant constitutive crack propagation laws from dynamic crack
propagation experiments is thus a challenging operation. Consequently, the first
step for assessing dynamic crack propagation laws is the development of
numerical simulation tools. Some numerical tools are now able to represent
dynamic crack growth but these numerical results have to be compared with
experimental results to ensure that the numerical laws introduced are physically
consistent. In a previous work [1], crack tip position histories have been
determined by standard optical tools.
estimate. Unlike quasi-static cases, where the loading and crack position can be
easily established, in dynamic impact cases, loading conditions, propagation
parameter variations and exact crack positions are difficult to control. The
determination of relevant constitutive crack propagation laws from dynamic crack
propagation experiments is thus a challenging operation. Consequently, the first
step for assessing dynamic crack propagation laws is the development of
numerical simulation tools. Some numerical tools are now able to represent
dynamic crack growth but these numerical results have to be compared with
experimental results to ensure that the numerical laws introduced are physically
consistent. In a previous work [1], crack tip position histories have been
determined by standard optical tools.
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