| 大直径SHPB系统角闪岩的冲击动力试验 |
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| 引用本文： | 吕晓聪,许金余,张龙,张磊. 大直径SHPB系统角闪岩的冲击动力试验[J]. 兵工学报, 2010, 0(Z1) |
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| 作者姓名： | 吕晓聪 许金余 张龙 张磊 |
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| 作者单位： | 空军工程大学工程学院;西北工业大学力学与建筑工程系;空后机场营房部老干部建房处; |
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| 摘 要： | 采用大直径分离式霍普金森压杆(SHPB)装置,在波形整形技术试验的基础上,对不同厚度的圆柱形角闪岩试件在冲击压缩过程中的应力均匀性进行分析,确定了岩石试件的最佳尺寸;对角闪岩在高应变率下的动态力学性能进行试验;分析了其应力应变曲线的力学特性;并从岩石材料微观结构的角度对角闪岩动态抗压强度、破坏形态和能量耗散随应变率的变化规律进行了研究。结果表明,在较低应变率下,角闪岩试件的动态压缩破坏呈显著的轴向劈裂破坏模式;在较高应变率下,试件破坏呈现压碎破坏模式;角闪岩的比能量吸收值与应变率.ε呈线性关系,而动态抗压强度增长因子η(即动态抗压强度)与.ε1/3成线性关系。
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| 关 键 词： | 分离式霍普金森压杆 角闪岩 波形整形 最佳尺寸 比能量吸收 动态抗压强度增长因子 |
Impact Experiments for Amphibolite Using Large-diameter SHPB |
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| LV Xiao-cong,XU Jin-yu,,ZHANG Long,ZHANG Lei. Impact Experiments for Amphibolite Using Large-diameter SHPB[J]. Acta Armamentarii, 2010, 0(Z1) |
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| Authors: | LV Xiao-cong XU Jin-yu ZHANG Long ZHANG Lei |
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| Affiliation: | LV Xiao-cong1,XU Jin-yu1,2,ZHANG Long3,ZHANG Lei1(1.The Engineering Institute,Air Force Engineering University,Xi'an 710038,Shaanxi,China,2.College of Mechanics and Civil Engineering,Northwestern Polytechnic University,Xi'an 710072,3.Cadre Construction Office of Airport and Barracks Department,Air Force Logistics Ministry,Beijing 100720,China) |
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| Abstract: | Based on the waveform shaping and the analysis of stress uniformity in specimen, the optimal size of cylindrical amphibolite specimen was determined by using the split Hopkinson pressure bar(SHPB)with diameter of 100 mm;its dynamic mechanics performances under high strain rate were tested;based on the experiment results,the stress-strain curves were analyzed;and the patterns that the dynamic compressive strength,failure configuration and energy dissipation vary with the strain rate were summarized.The resul... |
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| Keywords: | split Hopkinson pressure bar amphibolite waveform shaping optimal size specific energy absorbency dynamic strength increase ratio |
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