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Zheng Yao. ON THE J INTEGRAL FOR REGIONAL HETEROGENEOUS WELDED JOINTS WITH CRACKS[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 1990, (4): 245-250.
Citation: Zheng Yao. ON THE J INTEGRAL FOR REGIONAL HETEROGENEOUS WELDED JOINTS WITH CRACKS[J]. TRANSACTIONS OF THE CHINA WELDING INSTITUTION, 1990, (4): 245-250.

ON THE J INTEGRAL FOR REGIONAL HETEROGENEOUS WELDED JOINTS WITH CRACKS

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  • Received Date: September 09, 1990
  • Proposing a counter example,it is proved that J integral is not conservative in regional heterogeneous media.Noticing the discontinuity of stress and strain components somewhere,J* integral is presented to modify J* integral.The pathindependence and the physical meaning of the J* integral,and the energy expression J*=-1∂U/B∂a are verified simply.The concept and the constitution approach of interface elements are put forward for regional heterogeneous media in elastoplastic FEM analysis.
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