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首页> 外文会议>International Conference on Processing amp; Manufacturing of Advanced Materials Pt.5; Jul 7-11, 2003; Leganes, Madrid, Spain >Elastic Stability and the Limits of Strength
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Elastic Stability and the Limits of Strength

机译：弹性稳定性和强度极限

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摘要

The upper limit of strength (the "theoretical strength") has been an active subject of research and speculation for the better part of a century. The subject has recently become" important, for two reasons. First, given recent advances in ab initio techniques and computing machines, the limits of strength can be calculated with considerable accuracy, making this one of the very few problems in mechanical behavior that can actually be solved. Second, given recent advances in materials engineering, the limits of strength are being approached in some systems, such as hardened or defect-free films, and their relevance is becoming recognized in others. The present paper discusses some interesting results from recent research on the limits of strength, with an intermixture of speculations based on those results. Topics include the inherent nature of {100} cleavage and "pencil slip" in bcc metals, the inherent ductility of fcc metals, the anomalous properties of Al, and the possibility of measuring ideal strength with nanoindentation.
机译：强度的上限（“理论强度”）一直是二十世纪下半叶研究和推测的活跃课题。该主题最近变得很重要，其原因有两个：首先，考虑到从头算技术和计算机技术的最新发展，可以非常准确地计算强度的极限，这使其成为机械行为中极少数可以实际解决的问题之一。其次，鉴于材料工程的最新进展，某些系统（例如硬化或无缺陷的薄膜）正在接近强度极限，而在其他系统中它们的相关性也逐渐得到认可。研究强度极限，并在这些结果的基础上进行推测，包括bcc金属中{100}断裂和“铅笔滑移”的固有性质，fcc金属的固有延展性，Al的反常特性以及利用纳米压痕法测量理想强度的可能性。

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