碳纤维复合材料箱形梁截面参数对抗弯刚度的研究

STUDY ON BENDING STIFFNESS OF CFRP BOX BEAM CROSS-SECTION PARAMETERS

本文应用有限元软件Abaqus仿真分析了箱形梁的截面参数对其抗弯刚度的影响,包括梁截面高度、上下翼缘壁厚、上翼缘以及下翼缘壁厚四个方面,从而保证在梁的质量不变的前提下,提高其抗弯刚度,并与同尺寸的金属材料比较。结果表明:通过增加上下翼缘的厚度,使碳纤维复合材料箱形梁的截面高度增大,而且对下翼缘、上下翼缘加厚以及上翼缘加厚均能有效提高碳纤维复合材料箱形梁的抗弯刚度。其中,下翼缘加厚对抗弯刚度的提高最明显,上翼缘加厚对抗弯刚度的提高效果最差,可为碳纤维复合材料箱形梁的设计优化提供参考,具有一定的实用价值。

In this paper,the finite element software Abaqus is used to simulate and analyze the influence of cross-section parameters of box beam on its bending stiffness,including the beam section height,the upper and lower flange wall thickness,the upper flange wall thickness and the lower flange wall thickness,so as to improve its bending stiffness when the weight of the beam was unchanged,and compare with the same size of metal materials.The results show that the bending stiffness of CFRP box girder can be improved effectively by increasing the section height of the beam,thickening the upper and lower flange and thickening the upper flange. The bending stiffness of the lower flange thickening is the most effective,and thickening of the upper flange is the worst,which provides a reference for the design optimization of composite material box beam and has a certain practical value.