grain fracture meaning in English

穿晶断口
药柱断裂

Coarse grained fracture
粗晶断口
Fine grained fracture
细晶断口
By researched and analyzed , it was found that grain fracture had close relation with charge design safety of guns . grain fracture can lead to pressure abnormity in chamber . particularly in the condition of low temperature , it was the main cause leading to chamber blow
经研究分析，火药颗粒的破碎直接影响到装药设计安全性，造成膛压异常现象，特别在低温条件下，火药破碎是引起膛炸的主要原因。
The dissertation links with charge design safety of guns and constitutes the theory model of relation between grain fracture and interior ballistic performance . the program which resembles the influence of grain fracture to interior ballistic performance is compiled . the relation between grain fracture and exceptional pressure in chamber is analyzed , and an elementary analysis to the principle of chamber blow is made
本论文是结合火炮装药设计安全性的研究课题，通过理论分析和数值仿真的研究手段，建立火药破碎与内弹道性能关系的理论模型，进行火药破碎对内弹道性能影响的数值仿真，分析了火药破碎与膛内异常压力之间的联系，并对膛炸机理进行初步分析。