铝合金靶板中绝热剪切现象与抗弹性能的关系
The Relationship between Adiabatic Shear and Ballistic Properties in Al-Alloy Targets
本文用金相试验的方法对抗弹性能不同的铝合金靶板，作了弹坑解剖分析。发现板的抗弹性能与绝热剪切现象有关。并用一维霍布金森杆在应变率为102/s下测定两种铝合金的动态应力一应变曲线。把两种合金的动态强度代入绝热剪切的临界应变和临界应交率条件，分析比较了动态力学性能对靶板的绝热剪切性能及抗弹性能的影响。
The crater analysis for Al-alloy targets of different ballistic properties by metallography is presented in this paper. It is found that the ballistic property of the target is concerned with the adiabatic shear. Dynamic stress-strain curves of two kinds of Al-alleys are determined with a strain rate of one hundred per second ( = 102/s) by one dimensional Split Hopkinson Bar. The effect of dynamic behavior on the adiabatic shear and ballistic properties is analysed and .compared with critical conditions of strain and strain rate，where yield stresses of two alloys are used.
〔1〕林哈尔脱“金属在脉冲载荷下的性态”中译本1962。〔2〕“Mechanical Properties of High Rates of Strain” 1974. 〔3〕段祝平等“高应变率下金属动力学性能的实验与理论研究”力学进展，1980.N1。〔4〕R. S. Culver “Metallurgical Effects at High Strain Ratesw1973. p519, 〔5〕D. R. Recht“J. Appl. Mech, ”31，1964, p 189.
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