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北京石油化工学院2026年研究生招生接收调剂公告
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amannnn

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[交流] 【资源】最新nature material 关于非晶形变的论文

理论工作相当的漂亮

[ Last edited by hslining on 2009-9-12 at 08:54 ]
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jcytc

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谢谢哦
呵呵 楼主好人
履道坦坦,幽人贞吉
5楼2009-06-16 15:22:38
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hslining

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Abstract


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The fracture mechanism of amorphous materials, which are of crucial importance in various fields of engineering, remains a long-standing fundamental problem of science despite intensive efforts over the years. On the basis of a novel rheological model of fracture, we demonstrate that nonlinear behaviour associated with fracture is a consequence of the coupling between density fluctuations and deformation fields: shear-induced enhancement of density fluctuations is self-amplified by the resulting enhancement of dynamic and elastic asymmetry between denser and less-dense regions. This positive feedback may be the origin of fracture. We propose novel criteria for the onset of mechanical instability, extending from ductile to brittle fracture. Their validity is checked by comparing them with numerical solutions of our model and existing experimental results of metallic and polymeric glass formers. The criteria enable us to predict and design fracture behaviour of materials from the pressure dependence of their viscoelastic properties.
2楼2009-06-15 22:47:55
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imrsfb

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俺来给个链接:
Nature Materials
Published online: 14 June 2009 | doi:10.1038/nmat2468

Inhomogeneous flow and fracture of glassy materials

Akira Furukawa1 & Hajime Tanaka1

http://www.nature.com/nmat/journ ... /full/nmat2468.html
4楼2009-06-16 14:20:40
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doctall23

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thank you for sharing
7楼2009-11-19 01:19:47
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