本文提出了一个改进的等截面双悬臂试样恒位移处理模型。基于此种增大的双悬臂梁恒位移模型,提出等截面双悬臂试样在恒位移条件下为恒K试样,并计算了4340钢的断裂韧性值。
A modified model of double cantilever beam in determining K_(IC) has been pro-posed. In our model the behaviour of the double cantilever beam specimen ischaracterized by a constant stress intensity factor on condition that cracks in thespecimen propagate under constant displacement conditions. Results obtained froma 4340 steel appear to be in reasonable agreement with the established data.
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