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本文描述一种长杆高速冲击确定K1d的实验装置，提出在断裂时间tf＜τ（τ为试样固有振动周期）范围内确定动态断裂韧度K1d的原理与方法，给出包含冲击速度（v0）和冲击载荷（P（t））的K1d计算公式利用该实验装置和所给K1d计算方法在不同的冲击速度条件下，测得三种回火处理30MnCrNiMoB高强装甲钢的K1d，结果表明K1d随加载时间增加而增加
This paper describes an experimental device for determination of K1d at high speed, and proposes the principle and method of determining the dynamic fracture toughness K1d in the range of fracture time tf <τ (τ is the natural vibration period of the sample) ) And impact load (P (t)) K1d calculation formula using the experimental device and K1d given under different impact velocity conditions, measured three tempering 30MnCrNiMoB high-strength armored steel K1d results show that K1d with Load time increases and increases