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1. 南京理工大学 机械工程学院, 江苏 南京 210094
2. 中北大学 机电工程学院, 山西 太原 030051
Received:29 March 2024,
Published Online:26 November 2024,
Published:30 November 2024
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Jian GAO, Libo ZOU, Cungui YU. Numerical Simulation of Coating Spalling on Barrel Based on Phase-field Coupled Cohesive Force Model[J]. Acta Armamentarii, 2024, 45(11): 4081-4093.
Jian GAO, Libo ZOU, Cungui YU. Numerical Simulation of Coating Spalling on Barrel Based on Phase-field Coupled Cohesive Force Model[J]. Acta Armamentarii, 2024, 45(11): 4081-4093. DOI: 10.12382/bgxb.2024.0227.
身管武器在使用过程中其内膛镀层会发生剥落现象
缩短身管武器使用寿命
该现象的机理尚未明确。为研究身管武器内膛镀层剥落现象
提出一种相场耦合内聚力模型的数值模拟方法。考虑到相场具有的连续介质力学特性在裂纹扩展模拟中的优越性以及内聚力模型在多相材料界面损伤模拟中的普遍适用性
针对身管武器镀层和基体内部的裂纹扩展行为使用相场进行模拟
而针对基体和镀层界面的损伤使用内聚力模型进行模拟。针对裂纹在界面处发生偏转的现象
开展一条裂纹和两条裂纹发生扩展的有限元仿真
并与试验结果进行对比;研究镀层存在多条裂纹时不同裂纹间距对界面损伤的影响;此外还讨论了相场特征长度对裂纹扩展行为的影响。研究结果表明:当裂纹扩展至基体和镀层界面时会转而沿界面向两侧扩展
最终演化为界面失效;当多条裂纹扩展至界面处时
界面损伤主要发生在多条裂纹之间的区域
最终演化为镀层剥落;裂纹间距对界面的初始损伤和界面损伤发展速度存在影响;新提出的相场耦合内聚力模型的数值模拟方法可以作为研究身管镀层失效机理的计算方法。
The coating on the inner chamber may peel off during the use of barrel
shortening the service life of barrel weapon. The mechanism behind this phenomenon is not yet clear. To study the phenomenon of coating peeling in the barrel of barrel weapons
A numerical simulation method for the phase-field model (PFM) coupling with the cohesive zone model (CZM) is proposed. Considering the superiority of continuous medium mechanical properties of PFM in crack propagation simulation and the universal applicability of CZM in multiphase material interface damage simulation. PFM is used to simulate the crack propagation behaviors inside the coating and substrate
while CZM is used to simulate the damage at the interface between the substrate and the coating. The finite element simulation is made for one crack and two cracks propagating at the interface to address the phenomenon of crack deflection
and the simulated results are compared with experimental data. The effects of different crack spacings on interface damage are studied
and the influence of phase-field characteristic length on crack propagation behavior is also discussed. The research results show that
when the crack extends to the interface between the substrate and the coating
it will turn to propagate to both sides along the interface
and eventually making the interface be failure; when multiple cracks propagate to the interface
the interface damage mainly occurs in the area between the multiple cracks
ultimately evolving into coating peeling. The crack spacing has an impact on the initial damage and the development rate of interface damage. The proposed numerical simulation method of the phase field coupled cohesive force model can serve as a computational method for studying the failure mechanism of barrel coatings.
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毛保全 , 赵其进 , 白向华 , 等 . 火炮身管延寿技术研究现状与展望 [J ] . 兵工学报 , 2023 , 44 ( 3 ): 638 - 655 . DOI: 10.12382/bgxb.2021.0787 http://doi.org/10.12382/bgxb.2021.0787 火炮身管延寿难题长期制约着其综合性能的进一步提升和作战效能的持续发挥,延长身管使用寿命成为现代化及未来战场的迫切需求。通过概括影响火炮身管寿命的主要因素,从改进发射药、身管内膛表面处理、优化弹丸和膛线设计、炮钢材料改进、磁控等离子体抗烧蚀技术等方面阐述当前用于火炮身管延寿的主要技术措施,总结相关技术的国内外研究进展,并分析国内在上述技术领域存在的短板。从明晰火炮身管内膛壁面的烧蚀磨损规律,遴选可行延寿方法并多措并举开展科研攻关以及探索并发展磁控等离子体抗烧蚀新技术等方面展望我国在火炮身管延寿领域未来的发展方向。研究成果可为发展火炮身管常规延寿技术提供思路,并为探索新型延寿技术提供启发,进而可为延长身管使用寿命、提升火炮作战效能提供参考和借鉴。
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