微观损伤 meaning in English
microscopic damage
Examples
- The effects of strength mis - matching and specimen geometry on the resistance to ductile crack growth for welded joint were conducted by 3 - d fe analysis based on the micro - damage model
摘要基于材料微观损伤模型，采用三维有限元数值方法，定量研究了焊接接头中强度匹配、试件几何型式对接头抗延性裂纹扩展阻力特性的影响。 - Sicp / al matrix composites , with 5 , 15 and 25 % volume fraction of sic particles , were prepared by vacuum hot - pressing sintering processing in this paper . based on mechanics properties , sem observation and energy dispersive x - ray analysis , the interface reaction phenomenon of sicp / al composites made by vacuum hot - pressing sintering , as well as the reinforcement and fracture mechanisms of this composite were analyzed . the dynamic responses of sipc / al composites were studied by a split hopkinson high - speed pressure bar impact system which strain rate was from quasistatic state strain rate ( 3 . 3 10 - 3s - 1 ) to dynamic state strain rate ( 5 . 2 103 s - 1 )
本研究以武装直升飞机防护装甲材料为研究对象，采用真空热压粉末冶金烧结工艺制备了含sic颗粒体积分数分别为5 、 15和25的sic颗粒增强铝基复合材料，结合其力学性能、扫描电镜和界面微区能谱分析结果，分析了sic _ p al复合材料的真空烧结过程中的界面现象，以及材料增强和断裂机理，并利用hopkinson高速压杆冲击实验系统对其从静态到动态(应变率为3 . 3 10 ~ ( - 3 ) s ~ ( - 1 ) 5 . 2 10 ~ 3s ~ ( - 1 ) )的压缩破坏响应进行了研究，分析了不同体积分数sic _ p al复合材料高应变率压缩载荷下，材料的变形和微观损伤机理，以及利用高速冲击空气炮测定了改复合材料制备剃度复合板的穿透性能。 - Firstly , the parameters controlling ductile crack growth are gotten from the resistance curve result of standard 3 point bending specimen , then the resistance curves of the tension specimen for the welded joint with different strength mis - matching are predicted based on the cell model
首先由标准三点弯曲试件的阻力曲线，得出反映材料微观损伤的特殊单元模型控制参量，再根据该参量对不同接头强度匹配下双边缺口拉伸试件的阻力曲线进行了定量预测，其结果与试验结果相当吻合。 - Consider the fact that natural frequency can reflect the structure entity performance but cannot be sensitive to the structure local damage identification . in many cases , structure damage in deferent location can cause almost the same decrease in low frequency , so this method cannot ascertain the definite damage location
考虑到固有频率能够反映结构的整体性能，但对结构中局部微观损伤的识别不灵敏，在很多情况下，结构中不同位置的损伤引起的结构低阶频率下降几乎相同，因此用频率参数很难准确确定结构损伤位置。