材料力学中弯曲内力概念及计算的图例法教学设计

Graphic Method Teaching Design for Concept and Calculation of Bending Internal Force in Material Mechanics

"弯曲内力"是材料力学教与学的重点和难点内容,其学习效果的好坏直接影响后续课程的理解与掌握。教学实践中发现,学生学习本部分内容时常常感到难以掌握,为此,从已有的内力截面法求解入手,采用图解法深入阐释弯曲内力中弯矩和剪力两个基本概念,引导学生直观理解弯矩和剪力的概念和计算方法,从教学效果来看,采用文中的图解法教学,能够将枯燥的理论内容转化为直观的理解,提高了教学质量,为后续课程奠定了必要基础。

Internal bending force is the important and difficult points in teaching and learning in mechanics of materials,the learning situation of the mechanics of materials course can directly affect understanding and grasp of the following courses.Based on the teaching experience,when the students begin to learn the parts of knowledge,they feel it is very difficult to master.Therefore,graphic method is introduced to explain the two basic concepts on the basis of the existing methods of sections,namely shear force and bending moment,the method can directly help the students master the concepts and calculation methods.From the view of teaching effect,the dull theory can be mastered more visually,which is important to improve the teaching quality and lay a foundation for the following courses.