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火炮发射时身管材料内部裂纹在镀层/基体界面处存在多种扩展行为，不同的行为造成的身管内膛损伤形式不同。为研究身管内部裂纹在界面处的扩展行为，提出一种基于相场法的身管裂纹扩展数值模型。在统一内聚力相场模型的基础上，使用界面相场模型将界面统一描述，利用高阶相场易收敛的特性，研究了热力耦合条件下界面临界能量释放率对裂纹扩展行为的影响。结果表明：界面临界能量释放率会显著影响裂纹的扩展行为，该参数值较小时，裂纹会在界面处发生偏转，最终沿界面扩展，造成镀层的整块脱落；该参数值较大时，裂纹会穿透界面进而向基体内部扩展，形成贯穿形裂纹。
Abstract：The phenomenon of internal cracks in the barrel material at the coating/substrate interface during artillery firing can be attributed to a variety of propagation behaviors. These behaviors, in turn, result in distinct forms of damage to the barrel bore. The following study proposes a numerical model of barrel crack propagation based on the phase field method. The purpose of this model is to examine the propagation behavior of internal cracks in the barrel at the interface. The interface phase field model was employed to describe the interface uniformly on the basis of PF-CZM. The influence of the critical energy release rate of the interface on crack propagation behavior under thermal coupling conditions was studied by taking advantage of the convergence property of high-order phase fields. The findings suggest that the critical energy release rate at the interface exerts a substantial influence on the crack propa-gation behavior. When the parameter value is minimal, the cracks deflect at the interface and eventua-lly propagate along the interface, causing the entire coating to detach. Conversely, when the parameter value is substantial, cracks can penetrate the interface and propagate into the matrix, forming a through crack.
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基本信息:
DOI：10.19323/j.issn.1673-6524.202503007
中图分类号:TJ303.1
引用信息:
[1]邹利波,李英,李强,等.基于相场法的身管裂纹扩展行为研究[J].火炮发射与控制学报,2025,46(06):60-67+107.DOI:10.19323/j.issn.1673-6524.202503007.
基金信息:
山西省基础研究计划项目(202203021222037)
2025-03-10
2025
2025-12-10
2025
1
2025-06-18
2025-06-18
2025-06-18