| 查看: 6542 | 回复: 130 | ||
| 当前只显示满足指定条件的回帖，点击这里查看本话题的所有回帖 | ||
[资源]
残余应力的实践测量方法
|
||
|
Practical Residual Stress Measurement Methods Residual stresses are created by almost every manufacturing process, notably by casting, welding and forming. But despite their widespread occurrence, the fact that residual stresses occur without any external loads makes them easy to overlook and ignore. This neglect can cause great design peril because residual stresses can have profound influences on material strength, dimensional stability and fatigue life. Sometimes alone and sometimes in combination with other factors, unaccounted for residual stresses have caused the failure of major bridges, aircraft, ships and numerous smaller structures and devices, often with substantial loss of life. At other times, residual stresses are deliberately introduced to provide beneficial effects, such as in pre-stressed concrete, shot-peening and cold hole-expansion. Starting from early curiosities such as “Rupert’s Drops,” understanding of the character and mechanics of residual stresses grew with the rise in the use of cast metals during the Industrial Revolution. The famous crack in the Liberty Bell is due to the action of residual stresses created during casting. Early methods for identifying the presence of residual stresses involved cutting the material and observing the dimension changes. With the passage of time, these methods became more sophisticated and quantitative. Complementary non-destructive methods using X-rays, magnetism and ultrasonics were simultaneously developed. Modern residual stress measurement practice is largely based on the early historical roots. However, the modern techniques bear the same relationship to their predecessors as modern jet planes to early biplanes: they share similar conceptual bases, but in operational terms the current measurement techniques are effectively “new.” They have attained a very high degree of sophistication due to greatly increased conceptual understanding, practical experience and much more advanced measurement/computation capabilities. All these factors join to give substantial new life into established ideas and indeed to produce “new lamps for old.” Conceptual and technological progress has been a collective endeavor by a large group of people. The list of names is a long and distinguished one. To paraphrase Isaac Newton’s words, the present Residual Stress community indeed “stands on the shoulders of giants.” A particular one of these giants that several of the contributors to this book were privileged to know and learn from, was Iain Finnie, late Professor of Mechanical Engineering at the University of California, Berkeley. Professor Finnie was a pioneer of the Slitting Method, described in detail in Chapter 4 of this book. I join with the other authors in dedicating this book to him as a sign of respect and of appreciation for his encouragement, teaching, mentorship and personal friendship. Those of us who aspire to be researchers and teachers can do no better than look to him for example. On a personal note, I would like to express my sincere gratitude and appreciation to all the chapter authors of this book. The depth of their knowledge and experience of their various specialties and their generous willingness to share their expertise makes them a true “dream team.” They have been extraordinarily patient with all my editorial requests, both large and small, and have worked with me with grace and patience. Thank you, you have been good friends! I also would like to thank the staff at John Wiley & Sons for the support and encouragement of this project, and for the careful way they have carried forward every step in the production process. And finally, more personally, I would like to acknowledge my late parents, Leonard and Lilly Schajer, whose fingerprints are to be found on these pages. They followed the biblical proverb “Train up a child in the way he should go: and when he is old, he will not depart from it.” In keeping with their philosophy, the royalties from the sale of this book have been directed to support students in financial need through the Leonard and Lilly Schajer Memorial Bursary at the University of British Columbia. All book contributors have graciously supported this endeavor and in this way hope to add to the available shoulder-space on which the next generation may stand. |
回复此楼» 本帖附件资源列表
-
欢迎监督和反馈：小木虫仅提供交流平台，不对该内容负责。
本内容由用户自主发布，如果其内容涉及到知识产权问题，其责任在于用户本人，如对版权有异议，请联系邮箱：xiaomuchong@tal.com - 附件 1 : Practical_Residual_Stress_Measurement_Methods.pdf
2014-11-12 08:12:46, 5.49 M
» 本帖已获得的红花（最新10朵）
sunwensheng» 猜你喜欢
一志愿重庆大学机械学硕080200 313分，求二轮调剂
已经有7人回复
-
华北理工大学矿业工程学院招调剂
已经有1人回复
-
电气科学与工程论文润色/翻译怎么收费?
已经有84人回复
-
沈阳高校招收机械、控制类等相关专业研究生（调剂）
已经有0人回复
-
华北理工大学矿业工程学院招调剂
已经有0人回复
-
【26年入学】红外半导体/电子信息/嵌入式视觉/诚招博士生 光电教育部重点实验室
已经有0人回复
-
山东省优青 青B通知了？？？？
已经有3人回复
-
【全奖博士/科研助理/博后招生】新加坡南洋理工大学机械与航空航天学院
已经有9人回复
-
想学习一下英语口语
已经有1人回复
-
中国机械工程投稿求助
已经有4人回复
72楼2016-01-20 22:39:41
简单回复
2014-11-12 09:14
回复
五星好评 顶一下，感谢分享！
lh1219613楼
2014-11-12 09:25
回复
五星好评 顶一下，感谢分享！
muxinjin4楼
2014-11-12 19:34
回复
五星好评 顶一下，感谢分享！
雷智锋石芸竹5楼
2014-11-12 21:56
回复
五星好评 顶一下，感谢分享！
2014-11-15 01:14
回复
五星好评 顶一下，感谢分享！
2014-11-15 16:56
回复
五星好评 顶一下，感谢分享！
2014-11-19 10:33
回复
五星好评 顶一下，感谢分享！
2014-11-19 20:34
回复
zhmgb10楼
2014-11-20 13:22
回复
五星好评 顶一下，感谢分享！
peterflyer11楼
2014-11-20 21:54
回复
五星好评 顶一下，感谢分享！
zjys588712楼
2014-11-20 22:22
回复
五星好评 顶一下，感谢分享！
leeman13楼
2014-11-23 10:44
回复
五星好评 顶一下，感谢分享！
hustfzt14楼
2014-11-24 09:06
回复
五星好评 顶一下，感谢分享！
