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用TiniusOlsen示波冲击试验机加载获得的P-△曲线,测定了高强钢的动态断裂韧性指标J。对不同加载速度和不同截面的试样进行了对比试验。并用归一化指标U=(断裂能/总能)表征了材料在动载下的韧脆性。
The P-Δ curve obtained with the TiniusOlsen oscillometric impact tester was loaded and the dynamic fracture toughness index J of high strength steel was measured. The different loading speed and different section of the sample were compared. The ductile brittleness of the material under dynamic loading was characterized by the normalized index U = (energy at break / total energy).