木梁弯曲的教学拓展与实践创新

TEACHING EXPANSION AND PRACTICE INNOVATION OF WOODEN BEAM BENDING

  • 摘要: 木材具有复杂的微观结构和特殊的力学性能,理应在材料力学教学中占据一席之地,以期启发学生全面掌握材料力学原理。为此,教师在课外进行了木梁弯曲实验的教学拓展。教师选定木材种类和横截面尺寸后,交由学生搭建适当跨度的木梁,要求其利用身边的物品构建加载和测量装置,并独立完成实验。教师根据实验设计的独立性、结果的准确性和方法的新颖性做出质量评定,并引导学生结合材料力学基本假设以及木材特性进行实验误差分析,实现完善学生知识结构、优化学生能力素质的预期目标。

     

    Abstract: Wood has a complex microstructure and special mechanical properties, and should occupy a place in the teaching of materials mechanics. Wood can also inspire students to comprehensively master the principles of materials mechanics. Therefore, the teacher conducted a teaching expansion of wooden beam bending experiment outside of class. After the teacher selects the type of wood and cross-sectional size, the students are asked to build wooden beams with appropriate spans, use items at hand to construct loading and measuring devices, and independently complete the experiment. Teachers evaluate the quality of experimental design based on independence, accuracy of results, and novelty of methods, and guide students to conduct experimental error analysis by combining basic assumptions of material mechanics and wood properties. Through this teaching expansion, the expected goal of improving students' knowledge structure and optimizing their abilities can be achieved.

     

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