TH743 97063978能动薄主镜受均匀冲击载荷的计算模拟=Calculation and simulation for the active thin primary mir-ror suffering from homogeneous shock load[刊,中]/曾志革,凌宁(中科院光电技术研究所.四川,成都(610209))∥光电工...TH743 97063978能动薄主镜受均匀冲击载荷的计算模拟=Calculation and simulation for the active thin primary mir-ror suffering from homogeneous shock load[刊,中]/曾志革,凌宁(中科院光电技术研究所.四川,成都(610209))∥光电工程.—1996,23(6).—11—17,28以Φ624 mm抛物面能动薄主镜为例建立了三维有限元模型,准确地计算出薄主镜的重量。展开更多
Tensile tests with small deformation amounts of 0.5%,1%,3%and 5%were performed at room temperature on as cast Mg-1%Al alloy.Microstructures of the Mg-1%Al alloys before and after deformation were observed by optical m...Tensile tests with small deformation amounts of 0.5%,1%,3%and 5%were performed at room temperature on as cast Mg-1%Al alloy.Microstructures of the Mg-1%Al alloys before and after deformation were observed by optical microscopy(OM) and transmission electron microscopy(TEM).The strain amplitude dependent and temperature dependent damping capacities of the as-cast and deformed Mg-1%Al alloys were investigated by dynamic mechanical analysis(DMA).The mechanism of deformation on damping capacity of Mg-1%Al alloy was discussed.The results show that the as-cast Mg-1%Al alloy has high damping value at high strain.When the tensile elongation is higher than 3%,the damping values of this alloy in high strain region are significantly decreased at room temperature.But the large amount of dislocations produced by tensile deformation are activated by heat,and then increase the damping value at high temperature.展开更多
文摘TH743 97063978能动薄主镜受均匀冲击载荷的计算模拟=Calculation and simulation for the active thin primary mir-ror suffering from homogeneous shock load[刊,中]/曾志革,凌宁(中科院光电技术研究所.四川,成都(610209))∥光电工程.—1996,23(6).—11—17,28以Φ624 mm抛物面能动薄主镜为例建立了三维有限元模型,准确地计算出薄主镜的重量。
基金Project(50801017)supported by the National Natural Science Foundation of ChinaProject(20080440843)supported by China Postdoctoral Science FoundationProject(HIT.NSRIF.2009028)supported by Natural Scientific Research Innovation Foundation in Harbin Institute of Technology,China
文摘Tensile tests with small deformation amounts of 0.5%,1%,3%and 5%were performed at room temperature on as cast Mg-1%Al alloy.Microstructures of the Mg-1%Al alloys before and after deformation were observed by optical microscopy(OM) and transmission electron microscopy(TEM).The strain amplitude dependent and temperature dependent damping capacities of the as-cast and deformed Mg-1%Al alloys were investigated by dynamic mechanical analysis(DMA).The mechanism of deformation on damping capacity of Mg-1%Al alloy was discussed.The results show that the as-cast Mg-1%Al alloy has high damping value at high strain.When the tensile elongation is higher than 3%,the damping values of this alloy in high strain region are significantly decreased at room temperature.But the large amount of dislocations produced by tensile deformation are activated by heat,and then increase the damping value at high temperature.
