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摘要:
The damage behaviors of a titanium matrix composite shaft under torsion loading were monitored using the acoustic emission technique.The composite shaft with SiC fibers at ± 45° orientations was prepared by the solid-state fabrication process.Both the torsional rigidity and torsional strength of the TMC shaft were improved by SiC fibers.The acoustic emission responses during the loading-unloading-reloading,under quasi-static and cyclic torsion tests were investigated.Multiple acoustic emission signals were grouped as mechanical noise,matrix deformation,interface debonding and fiber fracture using amplitude,waveform shape and frequency centroid parameters.A substantial reduction of signals generated by matrix deformation was found in the reloading test.During the quasi-static torsion test,interface debonding and progressive breaks of SiC fibers occurred.According to different acoustic emission behaviors,the failure process in the torsion fatigue test can be divided into three stages:the initial stage,the fiber fracture stage and the fast fracture stage.
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篇名 Monitoring Damage Evolution in a Titanium Matrix Composite Shaft Under Torsion Loading Using Acoustic Emission
来源期刊 金属学报(英文版) 学科
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年,卷(期) 2019,(10) 所属期刊栏目
研究方向 页码范围 1244-1252
页数 9页 分类号
字数 语种 英文
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金属学报(英文版)
月刊
1006-7191
21-1361/TG
16开
沈阳文化路72号
1988
eng
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2302
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1
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