论文部分内容阅读
为研究某大口径火炮身管的自紧残余应力场和发射中极端循环热冲击导致的热力耦合场,采用ABAQUS软件分析了考虑炮钢材料卸载线性硬化及鲍兴格效应的自紧过程,在此基础上进一步对发射过程进行仿真,获得了该自紧身管发射炮弹时的热力耦合响应。最后采用三维疲劳裂纹仿真软件—ALOF(Analyses Laboratory of Fracture),探明了药室部内膛表面二维直裂纹和斜裂纹扩展情况。研究结果为保障身管强度和可靠性及进一步确定服役寿命提供重要科学依据。
In order to study the self-tightening residual stress field of a large-caliber artillery barrel and the thermal coupling field caused by extreme cyclic thermal shock during launch, the self-tightening process considering unloading linear hardening and Bowenger effect of gun steel was analyzed by ABAQUS software. Based on this, the launching process is further simulated and the thermodynamic coupling response of the self-breech tube firing shells is obtained. Finally, three-dimensional fatigue crack simulation software-ALOF (Analyses Laboratory of Fracture) was used to prove the two-dimensional straight crack and oblique crack propagation on the chamber surface of the chamber. The results of the study provide important scientific evidences for ensuring the strength and reliability of the tube and further determining the service life.