网站首页  英汉词典

请输入您要查询的英文单词:

 

单词 Creep failure
释义

Creep failure

中文百科

蠕变 Creep (deformation)

(重定向自Creep failure)
 粘弹性材料在长周期下的加载应力(a)和诱导应变(b)随时间的关系
 粘弹性材料在短周期下的加载应力(a)和诱导应变(b)
 Strain as a function of time due to constant stress over an extended period for a viscoelastic material.
A diagram showing the diffusion of atoms and vacancies under Nabarro-Herring Creep.

蠕变英语:Creep),也称潜变,是在应力影响下固体材料缓慢永久性的移动或者变形的趋势。它的发生是低于材料屈服强度的应力长时间作用的结果。当材料长时间处于加热当中或者在熔点附近时,蠕变会更加剧烈。蠕变常常随着温度升高而加剧。

这种变形的速率与材料性质、加载时间、加载温度和加载结构应力有关。取决于加载应力和它的持续时间,这种变形可能变得很大,以至于一些部件可能不再发挥它的作用,例如,涡轮叶片的蠕变将会使叶片接触到外套,导致叶片的失效。蠕变常常是工程上和冶金上评价在高应力或高温下工作的部件所需要关注的。蠕变可能是组成失效模型的变形机制,也可能不是。混凝土中适中的蠕变有时是受欢迎的,因为它会减轻可能另外引发断裂的拉应力。

英语百科

Creep (deformation) 蠕变

(重定向自Creep failure)
 Strain as a function of time due to constant stress over an extended period for a viscoelastic material.
A diagram showing the diffusion of atoms and vacancies under Nabarro-Herring Creep.
 a) Applied stress and b) induced strain as functions of time over a short period for a viscoelastic material.
Creep on the underside of a cardboard box: a largely empty box was placed on a smaller box, and more boxes were placed on top of it.  Due to the weight, the portions of the empty box not upheld by the lower support gradually deflected downward.

In materials science, creep (sometimes called cold flow) is the tendency of a solid material to move slowly or deform permanently under the influence of mechanical stresses. It can occur as a result of long-term exposure to high levels of stress that are still below the yield strength of the material. Creep is more severe in materials that are subjected to heat for long periods, and generally increases as they near their melting point.

随便看

 

英汉网英语在线翻译词典收录了3779314条英语词汇在线翻译词条,基本涵盖了全部常用英语词汇的中英文双语翻译及用法,是英语学习的有利工具。

 

Copyright © 2004-2024 encnc.com All Rights Reserved
更新时间:2025/6/18 13:49:42