6066铝合金及D60钢爆破壳体的破片分析

来源期刊：中南大学学报(自然科学版)2002年第3期

论文作者：罗兵辉 柏振海

文章页码：270 - 273

关键词：破片机理;铝合金;钢;断裂

Key words：fracture behavior; aluminum alloy; steel; fracture

摘    要：以挤压、热处理工艺制备的6066铝合金和D60钢圆管型模拟炸弹,在砂坑中进行爆破实验,通过力学性能测试、破片率的评估及扫描电镜对破片断口形貌观察,结合2种材料性质及载荷强度,研究了2种材料在2种不同猛度炸药加载下的膨胀断裂行为,分析了与材料动态断裂行为相关的形貌特征,得出:在爆破压力作用下,2种材料破片断口形貌是拉伸断裂的解理和剪切型的混合断口,但6066铝合金以拉伸型断口为主,约占80%;D60钢以剪切型断口为主,约占70%;6066铝合金综合力学性能比D60钢的低,但其密度小,装药量大,爆破后破片小,破片率大.

Abstract: The fracture behaviours exhibited by tubular bomb casings of 6066 aluminum alloy and D60 steel were investigated in consideration of fragment rate. The results show that shear deformation occurs at the interior surface of the casing, and tensile deformation occurs at the outer surface under high explosive detonation pressure, but tensile deformation is dominant, i.e. about 80% in 6066 aluminum alloy and shear deformation is dominant, about 70% in D60 steel. The discrepancy between 6066 aluminum alloy and D60 steel was analyzed. The relations between material characters are also discussed together with loading-strength and deformation charater.