{"title":"弹塑性碰撞法向接触特性预测的理论模型","authors":"Sourabh Mukhopadhyay, Prasanta Kumar Das, Neerav Abani","doi":"10.1007/s10035-023-01307-0","DOIUrl":null,"url":null,"abstract":"<div><p>This article presents a theoretical prediction of elasto-plastic collision during normal impact. A new theoretical model is proposed to estimate coefficient of restitution and contact force–displacement characteristics during elasto-plastic collision. The proposed model can be considered as a modified version of Thornton’s model which comes into a very good agreement with FEA and experimental works. This model takes care of non-local plasticity as well as uniform pressure distribution instead of constant pressure distribution in core contact region in plastic phase. Concept of contact ring is proposed for first time in this article. The effect of adhesion on the proposed contact model is also discussed in this article. The validity of proposed contact model for a wide range of impact velocity proofs the model to be robust.</p></div>","PeriodicalId":582,"journal":{"name":"Granular Matter","volume":"25 2","pages":""},"PeriodicalIF":2.3000,"publicationDate":"2023-02-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://link.springer.com/content/pdf/10.1007/s10035-023-01307-0.pdf","citationCount":"0","resultStr":"{\"title\":\"A theoretical model to predict normal contact characteristics for elasto-plastic collisions\",\"authors\":\"Sourabh Mukhopadhyay, Prasanta Kumar Das, Neerav Abani\",\"doi\":\"10.1007/s10035-023-01307-0\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>This article presents a theoretical prediction of elasto-plastic collision during normal impact. A new theoretical model is proposed to estimate coefficient of restitution and contact force–displacement characteristics during elasto-plastic collision. The proposed model can be considered as a modified version of Thornton’s model which comes into a very good agreement with FEA and experimental works. This model takes care of non-local plasticity as well as uniform pressure distribution instead of constant pressure distribution in core contact region in plastic phase. Concept of contact ring is proposed for first time in this article. The effect of adhesion on the proposed contact model is also discussed in this article. The validity of proposed contact model for a wide range of impact velocity proofs the model to be robust.</p></div>\",\"PeriodicalId\":582,\"journal\":{\"name\":\"Granular Matter\",\"volume\":\"25 2\",\"pages\":\"\"},\"PeriodicalIF\":2.3000,\"publicationDate\":\"2023-02-18\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://link.springer.com/content/pdf/10.1007/s10035-023-01307-0.pdf\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Granular Matter\",\"FirstCategoryId\":\"5\",\"ListUrlMain\":\"https://link.springer.com/article/10.1007/s10035-023-01307-0\",\"RegionNum\":3,\"RegionCategory\":\"工程技术\",\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"Q3\",\"JCRName\":\"MATERIALS SCIENCE, MULTIDISCIPLINARY\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Granular Matter","FirstCategoryId":"5","ListUrlMain":"https://link.springer.com/article/10.1007/s10035-023-01307-0","RegionNum":3,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
A theoretical model to predict normal contact characteristics for elasto-plastic collisions
This article presents a theoretical prediction of elasto-plastic collision during normal impact. A new theoretical model is proposed to estimate coefficient of restitution and contact force–displacement characteristics during elasto-plastic collision. The proposed model can be considered as a modified version of Thornton’s model which comes into a very good agreement with FEA and experimental works. This model takes care of non-local plasticity as well as uniform pressure distribution instead of constant pressure distribution in core contact region in plastic phase. Concept of contact ring is proposed for first time in this article. The effect of adhesion on the proposed contact model is also discussed in this article. The validity of proposed contact model for a wide range of impact velocity proofs the model to be robust.
期刊介绍：
Although many phenomena observed in granular materials are still not yet fully understood, important contributions have been made to further our understanding using modern tools from statistical mechanics, micro-mechanics, and computational science.
These modern tools apply to disordered systems, phase transitions, instabilities or intermittent behavior and the performance of discrete particle simulations.
>> Until now, however, many of these results were only to be found scattered throughout the literature. Physicists are often unaware of the theories and results published by engineers or other fields - and vice versa.
The journal Granular Matter thus serves as an interdisciplinary platform of communication among researchers of various disciplines who are involved in the basic research on granular media. It helps to establish a common language and gather articles under one single roof that up to now have been spread over many journals in a variety of fields. Notwithstanding, highly applied or technical work is beyond the scope of this journal.
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