EFFECTS OF RATE ON CRACK GROWTH IN A RUBBER-MODIFIED EPOXY

机译：速率对橡胶改性环氧树脂裂纹扩展的影响

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Dramatic rate effects on crack propagation were observed in the 10-phr rubber-modified epoxy. This may originate from the influence of rate effects on extrinsic and/or intrinsic toughening in this material. This study indicates that the extrinsic toughening is essentially independent of crack velocity. Hence, the strong rate effects may arise from the velocity dependence of the intrinsic toughness. Furthermore, the crack instability may result from a transition of deformation mechanism when the deformation rate ahead of the process zone is sufficiently high.

机译：在10 phr橡胶改性的环氧树脂中观察到了严重的裂纹扩展速率影响。这可能源于速率效应对这种材料的外在和/或内在增韧的影响。这项研究表明，外在的增韧基本上与裂纹速度无关。因此，强速率效应可能是由固有韧性的速度依赖性引起的。此外，当加工区之前的变形率足够高时，裂纹不稳定性可能是由于变形机理的转变而引起的。

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来源
《International Conference on Deformation, Yield and Fracture of Polymers; 20000410-20040413; Cambridge; GB》|2000年|P.290-293|共4页
会议地点 Cambridge(GB)
作者
J. Du; M. D. Thouless; A. F. Yee;
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Department of Materials Science and Engineering The University of Michigan, Ann Arbor, Michigan 48109, USA;

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原文格式 PDF
正文语种 eng
中图分类复合材料;
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4. EFFECTS OF RATE ON CRACK GROWTH IN A RUBBER-MODIFIED EPOXY [C] . J. Du, M. D. Thouless, A. F. Yee International conference on deformation, yield and fracture of polymers . 2000

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EFFECTS OF RATE ON CRACK GROWTH IN A RUBBER-MODIFIED EPOXY

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