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在３种空穴损伤模式分析的基础上，提出了把空穴率作为药柱损伤变量和一种空穴损伤微细观体元的几何模型．分析推导了含空穴率的空穴损伤演变方程．因而把材料内部损伤程度的测量与其损伤演变的研究和寿命预测的工程实际应用联系起来，采用专利技术，实时体积应变和空穴率非接触自动测试系统，开展空穴损伤的实验研究，求得一种药柱的空穴损伤演变主曲线及其贮存使用寿命和剩余寿命．由于材料贮存失效临界点即临界空穴率是实测的，因而大大提高了寿命预测精度．
Based on the analysis of three hole damage modes, the hole rate is proposed as a geometric model of the grain damage variable and a hole damage micro-body voxel. The cavity damage evolution equation with hole rate is derived and analyzed. Therefore, the measurement of the internal damage degree of material is linked with the research of its damage evolution and the practical application of life prediction. The patented technology, the real-time volumetric strain and hole-rate non-contact automatic test system are used to carry out experimental study of hole damage, The Main Curves of Hole Damage Evolution of a Grain Column and Their Service Life and Remaining Life. As the critical point of material storage failure that is critical hole rate is measured, thus greatly improving the life prediction accuracy.