大学物理 ›› 2021, Vol. 40 ›› Issue (3): 4-7.doi: 10.16854 /j.cnki.1000-0712.200176

• 教学讨论 • 上一篇    下一篇

球状物体作微形变时弹性势能的研究

于凤军,汤振杰,田俊龙,张希威   

  1. 安阳师范学院物理与电气工程学院,河南安阳455000
  • 收稿日期:2020-05-07 修回日期:2020-06-09 出版日期:2021-03-20 发布日期:2021-03-19
  • 作者简介:于凤军( 1959—) ,男,河南安阳人,安阳师范学院物理与电气工程学院教授,主要从事理论物理、天体力学研究和教学工作.
  • 基金资助:
    国家自然科学基金资助项目( 11961131010) 资助; 河南省科技攻关资助项目( 172102210092) 资助

Study of the elastic potential energy of a spherical body in micro deformation

YU Feng-jun,TANG Zhen-jie,TIAN Jun-long,ZHANG Xi-wei   

  1. College of Physics and Electrical Engineering,Anyang Normal University,Anyang,Henan 455000,China
  • Received:2020-05-07 Revised:2020-06-09 Online:2021-03-20 Published:2021-03-19

摘要: 研究一个弹性球在保持体积不变的前提下,形变为长旋转椭球时的弹性势能. 首先通过最小势能原理和物理条件确定位移函数,然后根据弹性势能密度-应变-位移三者之间的关系,通过积分计算得到弹性势能,并且进行了有益的讨论.

关键词: 弹性球, 弹性势能, 最小势能原理, 应变张量, 位移函数

Abstract: In this paper,we study the elastic potential energy of an elastic sphere when it is deformed into a

long rotating ellipsoid while keeping its volume constant. Firstly,the displacement function is determined by the

principle of minimum potential energy and physical conditions. Then,according to the relationship among elastic

potential energy density,strain and displacement,the elastic potential energy is obtained by integral calculation,

and the beneficial discussion is made.

Key words: elastic ball, elastic potential energy, principle of minimum potential energy, strain tensor, displacement function