引用本文: 赵俊青, 甄玉宝, 周鹏, 王军, 胡恒山. 组合梁中性轴位置确定方法及应力分析1)[J]. 力学与实践, 2022, 44(1): 184-187.
ZHAO Junqing, ZHEN Yubao, ZHOU Peng, WANG Jun, HU Hengshan. METHODS FOR DETERMINING THE NEUTRAL AXIS POSITION AND STRESS ANALYSIS OF COMPOSITE BEAM1)[J]. MECHANICS IN ENGINEERING, 2022, 44(1): 184-187.
 Citation: ZHAO Junqing, ZHEN Yubao, ZHOU Peng, WANG Jun, HU Hengshan. METHODS FOR DETERMINING THE NEUTRAL AXIS POSITION AND STRESS ANALYSIS OF COMPOSITE BEAM1)[J]. MECHANICS IN ENGINEERING, 2022, 44(1): 184-187.

## METHODS FOR DETERMINING THE NEUTRAL AXIS POSITION AND STRESS ANALYSIS OF COMPOSITE BEAM1)

• 摘要: 中性轴是梁弯曲分析的重要概念,其位置的确定是组合梁弯曲变形与应力分析的关键。采用相当截面法、加权平均法分析不同材料组合梁中性轴位置。采用相当和加权的概念进行组合截面的正应力与切应力分析。分析可知相当截面法概念清晰、加权平均法简单高效。相当截面法和加权平均法可简化组合梁的应力分析。分析过程有助于加深学生对梁弯曲相关概念的理解,引发学生对弯曲问题的深入思考。

Abstract: The key to analyze a composite beam composed of different material is to find out the position of the neutral axis. The position is determined by the method of equivalent section and weighted average. Then the normal and shear stresses of the composite beam are analyzed based the equivalent and weighted counterparts. In term of finding out the position of the neutral axis, the equivalent section method is conceptually clear while the weighted average method is simple and efficient. The equivalent section and weighted average methods can simplify the stress analysis of composite beam. The process can help students to understand the related concepts of beam bending, and to think comprehensively on bending problems.

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