UC知道求一篇专业英语翻译（材料类） 完成后追加200分！
来源：百度知道 编辑：UC知道 时间：2024/05/29 11:17:41
Abstract
In order to prevent catastrophic failure of engineering structures in an aircraft crash, explosive or
impulsive loading, fracture properties under dynamic loading conditions should be investigated. One major
application is the integrity of lique"ed natural gas (LNG) storage tanks. The investigation of e!ects of strain
rate as well as tested temperature on the deformation behavior for it will be necessary. In this study, in order
to clarify the strain rate e!ect on the deformation behavior of 9% nickel steel, tensile tests were performed in
a strain rate range of 10~3 to 5]102 s~1 and at temperatures of 77 and 293 K. A drop weight testing
apparatus was slightly modi"ed to accommodate the application of the dynamic tensile load to specimens
and instrumented to detect the applied dynamic load. The corresponding displacement was simultaneously
measured by a laser displacement meter. Small-size specimens w
摘要
为了防止工程结构在飞机失事，爆炸或冲击载荷的情况下产生灾难性故障，需要研究动态加载条件下工程结构的断裂性能。液化天然气储油罐是其重要应用之一。对于应变速率以及测试温度对变形行为的影响的研究，将是必要的。为了弄清应变速率对于9 ％镍钢变形行为的影响，该项研究进行了应变率范围为每秒10 ~ 3（数字看不清），温度在77K与293K之间的拉伸试验。检测所用的落槌质量略有调整，以便于应用动态拉伸负荷样本和动态负载检测仪器。相应的位移由激光位移计同步测出。该研究使用的是小型标本。所得结果证实了材料随应变速率具有硬化行为，例如9 ％镍钢在每秒1（同样问题）的应变率下具有独特的硬化趋势。应变率增至 每秒51102 （同样问题）时，屈服强度在77K和293K温度下与静态相比，分别增加了20%和30%。但9%镍钢在温度为77K，应变率每秒250的情况下，伸长率仍然保持静态值。低温硬化的困难，导致材料77K时随应变速率的硬化行为并不如293K时明显。
（ 2000年埃尔塞维尔科技有限公司，版权所有）
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