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《Ordnance Material Science and Engineering》 2010-06
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Finite element analysis of microcosmic stress on the phase interfacial crack of powder metallurgy Be-Al alloy

FENG Ting,MA Ling,JIAO Qi,ZHAO Shuangqun(Department of Physics and Electrical Information,Ningxia University,Yinchuan 750021,China)  
With ANSYS software,the finite element method is used to analyze the stress field on the phase interface of the powder metallurgy Be-Al alloy,including crack between aluminum and beryllium particles.Two cases of tensile and compressive stress are calculated.Crack propagation mechanism and the effect of which on interfacial debonding and yield deformation were discussed qualitatively.The result shows that after the crack forming,stress distributions near crack along interface change obviously,the stress focuses at the piont of crack.In the case of tensile stress,both of matrix σ1 and σvon are get to the maximum at the point of crack where interfacial debonding and plastic distort occurs easily,it gives the same result as the experiment.In the case of compressive stress,σvon near Al-matrix changes obviously compared with Be-particle at the point of crack where plastic distortion occurs easily.
【Fund】: 国家自然科学基金资助项目(50761006)
【CateGory Index】: O346.1
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