弹塑性力学中加载路径效应的类比教学设计

Analogical Teaching Design of Loading Path Effect in Elastic-Plastic Mechanics

弹塑性力学是工程类研究生必选的核心课程,具有高度的抽象性和复杂性。基于经典薄壁圆管拉扭问题,对三种典型应力/应变路径进行深入分析,秉承“多走一步,深入三分”的教学理念,在教材中“不一样”结论的基础上,探讨了加载路径效应中“不一样”的规律性、统一性和普适性,并将发现的规律性与社会心理学中的经典理论进行了类比,提出了塑性强化材料应力路径的“首因效应”和应变路径的“近因效应”。塑性力学理论与社会心理学理论之间的强烈反差对比与完美的和谐统一,成功地激起了学生学习的热情,同时帮助学生建立了有效的知识框架,取得了很好的教学效果。

and complex.Based on the classic thin-walled circular tube tension and torsion problem,three typical stress or strain paths are analyzed.Adhering to the teaching philosophy of“one more step further,getting deeper insights”,based on the conclusion of“different”in the textbook,the regularity,unity and universality of“different”in loading path effect are discussed.The“primacy effect”of stress path and“recency effect”of strain path of plastically strengthened materials are proposed by analogy with the classical theory in social psychology.The strong contrast and the perfect harmony between plastic mechanics theory and social psychology theory successfully aroused students’enthusiasm for learning,helped to establish an effective knowledge framework,and achieved good teaching effect.