本文在Alberto Carpinteri研究集合材料(Aggregative Materials)断裂试验缺口敏感性的基础上,得到了圆环裂纹圆柱试样的脆性系数、裂纹扩展力、极限强度破坏力的关系曲线,并将脆性系数理论推广应用于金属材料.分析表明,在满足低应力脆断的情况下,用脆性系数分析铸镁合金和中、高强钢的断裂试验是合适的.
On the basis of the work about notch sensitivity of aggregativematerials in fracture tests by Alberto Carpinteri, the relationships between relativecrack depth and brittleness number, crack extension force as well as the force ofcollapse at ultimate strength for cylindrical specimens with ring-shaped cracks havebeen obtained. It was found that the parameter brittlencss number can be extensi-vely applied to metallic materials. The possibility of the use of brittleness numberto deal with the ascast magnesium alloy, medium or high strength steels under thecondition of fracture at low stress has been disccused.
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