تحلیل تجربی پارامترهای لازم در بارگذاری های مختلف برای محاسبه چقرمگی شکست به روش سطح اثر ترک در آزمون ویکرز

Using surface cracks generated by vickers test is one of the new and low cost methods for determining the fracture toughness of brittle materials. in this paper, experimental analysis is performed on the equation related to this new method. the effective of creation of chips and boundary conditions are discussed. for this research, various composites like as al2o3-nanosic, al2o3-nanosic-mgo, b4c-nanotib2-ni-fe with different loads are prepared. this research shows a little difference between the results obtained from the mentioned equation in various loading, different mechanical properties and alternation of mechanism of crack growths.