摘要
本研究将切口梁三点弯曲条件下已建立起的冷脆临界裂缝尺寸α_c 模型廷拓至中心穿透裂缝板材拉伸条件,给出了相应表达式并进行了试验验证。结果指出,该模型同样适用于后一力学条件,从而进一步扩展了该模型的应用范围。
The model of the critical crack size α_c for low-temperature brittleness,estab-lished under the condition of three-point notch-bend,has been extended through the presentstudy to the condition of tension of center-cracked sheet.The expression of α_c has been givenand its validity has been verified with the experiments on a mild steel A3.The result indicatesthat the model can be also applied to the latter condition,thus expanding the adaptability of themodel.
基金
国家自然科学基金
58870042
关键词
低碳钢
拉伸
临界
脆断
mild steel
center-cracked sheet
low-temperature brittle fracture
critical crack size
