Abstract
Aiming at the problem that the current coefficient of restitution model cannot effectively predict energy dissipation in the multi-body system collision process, a coefficient of restitution model considering the yield strength is proposed in this article. As an important parameter for energy loss and material deformation prediction during collision, the coefficient of restitution has an important influence on the accurate calculation of contact force. The current main coefficient of restitution models are compared and analyzed in this article. In view of the large difference between the results obtained by different models on the same parameter, through the use of ANSYS/LS–DYNA for dynamic simulation, the influence of different yield strengths on the coefficient of restitution is studied. Then, the article establishes a new coefficient of restitution model considering the yield strength combined with the J–G model, and verifies the effectiveness of the model in the article using experimental results. At the same time, the article compares the new coefficient of restitution model with the constant coefficient of restitution model, and further studies the effect of the coefficient of restitution on the dynamic results.
Highlights
In a multi-body system, the hinge pair is used as a necessary connecting component to transmit the force and motion between the components, and its performance will have a direct impact on the dynamic response of the system
Thisarticle articlestudies studies the the coefficient coefficient of contact. This of restitution restitutionin inthe thecalculation calculationprocess processofofthe the conforce of the multi-body system involving a revolute joint with clearance, and compares tact force of the multi-body system involving a revolute joint with clearance, and comand summarizes the coefficient of restitution models in theincurrent mechanical dynamics pares and summarizes the coefficient of restitution models the current mechanical dycalculation process
By different coefficient of restitution models under the same parameters, this article used software to simulate the influence of different material yield strength ratios on the coefficient
Summary
In a multi-body system, the hinge pair is used as a necessary connecting component to transmit the force and motion between the components, and its performance will have a direct impact on the dynamic response of the system. The accuracy of the contact force model used to study contact collision is very important for the prediction of the performance of a multi-body system involving revolute joints with clearance, and it is of great significance to derive an accurate contact force model. Researchers have found that the coefficient of restitution, which characterizes the energy dissipation in the collision process, is an important parameter for calculating the contact force in the collision process, which is of great significance for accurately predicting the dynamic characteristics, reliability, and friction and wear of mechanical systems [6,7,8]. The new coefficient of restitution model established in this article is of great significance to improve the accuracy of contact force prediction and can promote the development of the dynamics of multi-body systems involving revolute joints with clearance
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