高温超声速环境下管状武器热化学-机械损伤跨尺度预测

IF 6.3 1区 工程技术 Q1 ENGINEERING, MECHANICAL
Shuli Li, Guolai Yang, Liqun Wang
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引用次数: 0

摘要

高温超声速条件下的热化学-机械损伤预测是评估身管武器寿命的关键。结合跨尺度损伤框架和尺度扩展策略,提出了一种极端环境下的热化学-机械损伤预测方法。对于跨尺度损伤框架,宏观尺度表面损伤通过两相流内弹道转化为中尺度颗粒冲击。通过速度分解和合成,将颗粒碰撞转化为微尺度的晶体碰撞。对于尺度扩展策略,通过动量镜获得离散晶体的位错特征。第一种提出的边界位错可以解决离散晶体的边界耦合问题,修正硬化准则。在足够样本的基础上,建立了损伤剂模型,将中尺度晶体损伤推广到宏观尺度表面损伤。通过仿真实验验证了高温超声速环境下晶体冲击损伤计算方法的准确性。通过100枚弹丸的发射试验,验证了热化学-机械损伤预测方法的准确性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Cross-scale prediction for thermochemical–mechanical damage of barrel weapons under high-temperature and supersonic environments

Cross-scale prediction for thermochemical–mechanical damage of barrel weapons under high-temperature and supersonic environments

Thermochemical–mechanical damage prediction suitable for high-temperature and supersonic conditions is essential for evaluating the life span of barrel weapons. This paper proposes a thermochemical–mechanical damage prediction method in extreme environments by combining the cross-scale damage framework and scale expansion strategy. For the cross-scale damage framework, macroscale surface damage is converted into mesoscale particulate impacts via two-phase flow interior ballistics. The particulate impact is transformed into microscale crystal impacts via velocity decomposition and synthesis. For the scale expansion strategy, the dislocation features of discretized crystals are obtained via the momentum mirror. The first proposed boundary dislocation can solve the boundary coupling of discretized crystals and modify the hardening criterion. A damage agent model is constructed on the basis of sufficient samples to generalize mesoscale crystal damage to macroscale surface damage. A simulation experiment is executed to verify the accuracy of the calculation method for determining crystal impact damage under high-temperature supersonic environments. A launching experiment with 100 projectiles is executed to prove the accuracy of the thermochemical–mechanical damage prediction method.

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来源期刊
Friction
Friction Engineering-Mechanical Engineering
CiteScore
12.90
自引率
13.20%
发文量
324
审稿时长
13 weeks
期刊介绍: Friction is a peer-reviewed international journal for the publication of theoretical and experimental research works related to the friction, lubrication and wear. Original, high quality research papers and review articles on all aspects of tribology are welcome, including, but are not limited to, a variety of topics, such as: Friction: Origin of friction, Friction theories, New phenomena of friction, Nano-friction, Ultra-low friction, Molecular friction, Ultra-high friction, Friction at high speed, Friction at high temperature or low temperature, Friction at solid/liquid interfaces, Bio-friction, Adhesion, etc. Lubrication: Superlubricity, Green lubricants, Nano-lubrication, Boundary lubrication, Thin film lubrication, Elastohydrodynamic lubrication, Mixed lubrication, New lubricants, New additives, Gas lubrication, Solid lubrication, etc. Wear: Wear materials, Wear mechanism, Wear models, Wear in severe conditions, Wear measurement, Wear monitoring, etc. Surface Engineering: Surface texturing, Molecular films, Surface coatings, Surface modification, Bionic surfaces, etc. Basic Sciences: Tribology system, Principles of tribology, Thermodynamics of tribo-systems, Micro-fluidics, Thermal stability of tribo-systems, etc. Friction is an open access journal. It is published quarterly by Tsinghua University Press and Springer, and sponsored by the State Key Laboratory of Tribology (TsinghuaUniversity) and the Tribology Institute of Chinese Mechanical Engineering Society.
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