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发现圆柱形对称空心装药形成的射流之断裂时间可由下式准确地计算:ta′=1/(V_(pr.))((8R·T_L)/~(1/2))·sinβ/2该式是由第一次应用于这儿的一个普通原理得到的,该原理假定在极高的应变速率下均匀延伸的金属之断裂时间等于正在伸长的金属之最小起始尺寸除以V_PL。当该原理应用于简单的形状、如由于內部爆炸引起膨胀的管子时,能够对所形成的破片尺寸的平均值进行正确的预测。这个原理对下列实验事实第一次提出解释:卽当应变速率从10~(-2)秒~(-1)增加到10~5秒~(-1)时,金属的延伸性可能提高一个数量级。
It is found that the fracture time of a jet formed by a cylindrical symmetrical hollow charge can be accurately calculated by the following equation: ta '= 1 / (V_ (pr.)) (8R · T_L) / ~ (1/2) The formula is derived from a general principle first applied here, which assumes that the fracture time of a uniformly extending metal at an extremely high strain rate is equal to the minimum initial size of the growing metal divided by V_PL. When this principle is applied to a simple shape, such as a tube expanded due to an internal explosion, the average of the formed chip sizes can be correctly predicted. This principle is explained for the first time by the following experimental facts: 金 When the strain rate increases from 10-2 seconds -1 to 10-5 seconds -1, the ductility of the metal may increase by an order of magnitude .