球体-基底弹塑性接触/冲击过程的新型可变复原系数模型

IF 4.5 1区 工程技术 Q1 ENGINEERING, MECHANICAL Mechanism and Machine Theory Pub Date : 2024-08-21 DOI:10.1016/j.mechmachtheory.2024.105773
Jia Ma , Menghao Bai , Jie Wang , Shuai Dong , Hao Jie , Bo Hu , Lairong Yin
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引用次数: 0

摘要

恢复系数是评估接触/撞击过程中能量损失的关键参数。对其进行深入研究有利于准确描述接触/撞击现象。鉴于现有归还系数模型的局限性,本研究提出了一种新的可变归还系数模型,该模型考虑了两个碰撞体之间的材料特性和初始相对接触速度。首先,根据能量等效原理,可以得到恢复系数与等效塑性应变之间的函数关系。然后,进行多条件有限元数值模拟,探索等效塑性应变、材料特性和初始相对接触速度之间的映射关系,从而建立新的法变恢复系数模型。最后,以低速实验数据和高速有限元结果为参考值,与现有的几种复原系数模型进行了各种比较,以展示其优越性能。此外,新的恢复系数模型还被扩展用于描述两个球体之间的相互作用过程,并被用于建立新的连续接触力模型。
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A novel variable restitution coefficient model for sphere–substrate elastoplastic contact/impact process

The restitution coefficient serves as a critical parameter to evaluate the energy loss during the contact/impact process. Its in–depth researches are beneficial to accurately describing the contact/impact phenomenon. Given the limitations of existing restitution coefficient models, a novel variable restitution coefficient model, which considers the material properties and the initial relative contacting velocity between two colliding bodies, is proposed in this work. Firstly, the function relationship between the restitution coefficient and the equivalent plastic strain can be obtained based on the energy equivalence principle. After that, multi–condition FEM numerical simulation cases are conducted to explore the mapping relationship among the equivalent plastic strain, material properties and initial relative contacting velocity, with which the new normal variable restitution coefficient model can thus be established. Finally, various comparisons with several existing restitution coefficient models are conducted to showcase its superior performance, with the low–speed experimental data and high–speed FEM results acting as reference values. Furthermore, the new restitution coefficient model is extended to describe interaction process between two spheres, and also employed for the establishment of a new continuous contact force model.

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来源期刊
Mechanism and Machine Theory
Mechanism and Machine Theory 工程技术-工程:机械
CiteScore
9.90
自引率
23.10%
发文量
450
审稿时长
20 days
期刊介绍: Mechanism and Machine Theory provides a medium of communication between engineers and scientists engaged in research and development within the fields of knowledge embraced by IFToMM, the International Federation for the Promotion of Mechanism and Machine Science, therefore affiliated with IFToMM as its official research journal. The main topics are: Design Theory and Methodology; Haptics and Human-Machine-Interfaces; Robotics, Mechatronics and Micro-Machines; Mechanisms, Mechanical Transmissions and Machines; Kinematics, Dynamics, and Control of Mechanical Systems; Applications to Bioengineering and Molecular Chemistry
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