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STRESS CONCENTRATION AND MECHANICAL BEHAVIOURS OF FIBER / METAL COMPOSITES |
XIA Zhenhai; ZHU Shuqin (Hebei University of Technology; Tianjin 300130)(Manuscript received 1995-04-13; in revised form 1995-09-06) |
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Cite this article:
XIA Zhenhai; ZHU Shuqin (Hebei University of Technology; Tianjin 300130)(Manuscript received 1995-04-13; in revised form 1995-09-06). STRESS CONCENTRATION AND MECHANICAL BEHAVIOURS OF FIBER / METAL COMPOSITES. Acta Metall Sin, 1996, 32(1): 91-96.
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Abstract A multi-crack-interaction model has been proposed for analysis of the mechanical behaviours of metal-matrix composites reinforced by coated fibers. The stress concentrations and non-elastic effects such interface debonding and matrix yielding caused by the cracks can be calculated on the model. The result shows that there is high stress concentration in the fiber, which increases with increasing the matrix yielding width and the density of the cracks in the reaction zone, but decreases after interface debonding. There exists an optimum interfacial bonding with which the composites obtain the maximum strength. The optimum interfacial shear strength for SiC-coated C / Al composites is in the range of 100─300 MPa.Correspondent: XIA ZHENHAI, associate professor,(Department of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130)
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Received: 18 January 1996
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1OchiaiS,OsamuraK.MetallTrans.1988;19A:1492Nayeb-HashemiH,SeyyediJ.MetallTransA,1989;20A:7273NedeleMR,WisnomMR.Composites,1984:25:5494OchiaiS,MurakamiJ.MaterSci.1974;14:8315XiaZH.ActaMetallMater.1993;41:20976夏振海.西北工业大学博士学位论文,1990^ |
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