断口分形几何在失效分析中的应用

Application of Fracture Surface Fractal Geometry to Failure Analysis

研究了两种材料在不同断裂机制下断口形貌、韧性与分形维数的定量关系．结果表明：分形维数与材料韧性成线性关系．根据失效构件断口的分形维数值可推出失效时材料的韧性、断裂性质，可作为失效原因的定性及定量分析．

The relationship between the fracture surface, toughness and fractal dimension for two materials at different crack characteristics has been studied. Linear variations of the fractal dimension with toughness was shown. By using the relation of D in failure numbers, we will reduce the toughness and fracture type at crack. The formation is introduced as a powerful tool for the qualitative and quantiative analysis of failure analysis.