摘要
固体内耗是研究原子迁移、微观结构演化的重要方法,对理解固体结构缺陷动力学弛豫过程具有重要作用。本文从能量和应力应变滞回曲线出发推导了固体力学内耗表达式,后结合内耗与固体微观结构缺陷弛豫的本征关联概述了晶态固体和非晶态固体力学弛豫模式的研究前沿,这对于固体黏弹性力学的课程教学具有重要借鉴价值。本文结合作者近几年的固体内耗理论教学实践及研究成果,从教学内容、教学方法和教学环节等方面探讨该课程的教学。文中的教学措施可为其他讲授力学课程的教师提供参考。
As a fundamental characterizing method of atomic diffusion and microstructural evolution,internal friction in solids plays an important role in understanding the dynamic relaxation process of structural defects.Based on the perspective of energy conservation and stress-strain hysteresis curve,the concept of internal friction in solid mechanics was introduced in the current work.Combined with the essential relationship between internal friction and solid microstructure defect relaxation,the frontier progress of mechanical relaxation models of crystalline and amorphous solids is summarized,which has important reference value for the teaching process of viscoelastic mechanics.Based on the teaching practices and research results of solid internal friction theory for recent years,this paper investigates the teaching content,teaching methods and teaching links.The teaching measures mentioned in the current work may provide useful reference for other teachers who also teach relevant mechanics.
作者
乔吉超
郝奇
邢光辉
QIAO Jichao;HAO Qi;XING Guanghui(School of Mechanics,Civil Engineering and Architecture,Northwestern Polytechnical University,Xi'an,Shaanxi 710072)
出处
《物理与工程》
2023年第2期54-59,共6页
Physics and Engineering
基金
国家自然科学基金(51971178)
陕西省杰出青年基金(2021JC-12)。
关键词
固体内耗
动态力学分析
非晶合金
教学方法
internal friction in solids
dynamic mechanical analysis
amorphous solid
teaching methods
