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Effect of Ultrasonic Impact on the Microstructure of Welded Joint of 2195 Al–Li AlloyQi-Hao Chen,San-Bao Lin,Chun-Li Yang,Cheng-Lei FanState Key Laboratory of Advanced Welding and Joining,Harbin Institute of Technology摘 要:It is known that an ultrasonic impact during tungsten inert gas welding can refine the grains and improve the mechanical properties......
Effects of Temperature Induced Thermal Expansion and Oxidation on the Charpy Impact Property of C/C Composites米应映,燕青芝,LI Xianhui,HONG Ming,CAO Meiqi,ZHANG XiaoxinInstitute of Nuclear and New Energy... that will bear impact loading in thermal-oxidizing environments. For the components run for extended periods, the safe operation of components depends on how to evaluate damages under a dynamic load......
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Detecting Impact Damage in Carbon Fabric/epoxy-matrix Composites by Ultrasonic F-scan and Electrical Resistance Measurement谢小林Department of Materials Science and Engineering, Wuhan University... and electrical resistance measurement The experimental results shows that impact damage energy threshold value of carbon fabric/epoxy-matrix composites can determine by using ultrasonic F-scan. When the impact......
5A06铝合金单层板超高速撞击弹道极限分析 盖芳芳1,庞宝君1,马志涛1,贾斌1 (1.哈尔滨工业大学,空间碎片高速撞击研究中心,黑龙江,哈尔滨,150080) 摘要:日益增长的空间碎片对在轨航天器的安全运行构成了严重威胁,毫米级空间碎片的防护已成为航天器结构设计必须考虑的问题之一.航天器的蒙皮是抵御空间碎片超高速撞击的最基本防护结构.采用数值仿真并结合试验验证的方法,对5 mm厚5A06铝合金单层板承受2A12铝合金球形弹丸正撞击下的弹道极限进行了研究.研究表明,在验证实验速度范围内,数值仿真结果与实验结果吻合良好;使用数值仿真对实验速度以上的区间进行拓展研究,获得了其弹道极限曲线和弹......
椭球弹丸超高速撞击防护屏碎片云数值模拟 马文来1,张伟1,管公顺1,庞宝君1 (1.哈尔滨工业大学,航天学院,黑龙江,哈尔滨,150001) 摘要:低地球轨道的各类航天器易受到微流星体及空间碎片的超高速撞击.本文采用AUTODYN软件进行了椭球弹丸超高速正撞击及斜撞击防护屏碎片云的数值模拟.给出了三维模拟的结果.研究了在相同质量的条件下,不同长径比椭球弹丸以不同速度和入射角撞击防护屏所产生碎片云的特性,并与球形弹丸撞击所应产生的碎片云特性进行了比较.结果表明:在相同的速度下,不同长径比椭球弹丸撞击的碎片云形状,质量分布和破碎程度是不同的,随撞击入射角的增加弹丸的破碎程度增大,滑弹碎片云的......
Numerical modeling airflow in soil with impact of groundwaterZHANG Xiao-yue(张晓悦)1, WANG Dong(王栋)2, ZHANG Xiao-le(张晓乐)2, 3, CHEN Xiao-dong(陈晓东)1(1. Zhejiang Water Conservancy and Hydropower College, Hangzhou 310018, China;2. Hangzhou Branch of the IT Electronics Eleventh Design & Research Institute, Scientific and Technological)Abstract:In order to simulate the airflow in anhydrous case......
Impact of lanthanum on the modification of HfO2 films structureT.P.Smirnova,L.V.Yakovkina,V.O.Borisov摘 要:LaxHf1–xOy thin films with various concentrations of La, homogeneous and nonhomogeneous distributions of elements throughout the films thickness was purposefully grown by CVD. The composition of the films and their chemical structures were......
The Impact Failure and Energy Dissipation Mechanism of Polyethylene Laminates舒在勤1,ZHANG Fan1,WANG Weimin1,FU Zhengyi1,CHEN Wenjie2,张金咏11. State Key Laboratory of Advanced Technology for Materials Synthesis and Processing,Institute of Material Science and Engineering,Wuhan University of Technology2. System Design Institute of Hubei Aerospace Technology Academy摘 要:
Impact of lanthanum on the modification of HfO2 films structureT.P.Smirnova,L.V.Yakovkina,V.O.Borisov摘 要:LaxHf1–xOy thin films with various concentrations of La, homogeneous and nonhomogeneous distributions of elements throughout the films thickness was purposefully grown by CVD. The composition of the films and their chemical structures were......