The result shows,when brittle material of cast iron HT200 bears the uniaxial compressive force,the position of crack initiation is at the place of maximum stress triaxiality;

• 结果表明,脆性材料HT200单轴压缩时,启裂点位于应力三维度最大值处即试件中部,断裂方向为最大剪应力方向;