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提出了轴向和横向荷载下玻璃纤维聚合物(GFRP)悬臂管状杆的数值分析。建立三维有限单元,分析不同轴向荷载下的横向荷载-挠度曲线以及轴力-弯矩关系曲线。建立的模型是为了解决几何非线性和层状组合结构的问题的。当根据Tsal-Wu失效准则计算得到材料失效或者结构整体失稳时,就代表结构失效。试验结果证明了模型的有效性。对考虑不同层角度和交叉层、不同直径厚度比(D/t)和长度直径比(L/D)的杆件的参数化分析表明当D/t越小时,随着L/D的增加,杆件轴向强度下降得越快。在一定的D/t值情况下,GFRP分层结构对轴向强度和抗弯强度有显著影响。研究还表明:轴力-弯矩关系曲线一般是线性的。提高层中纵向纤维的含量或者减小纤维与构件纵向的交角能使关系曲线包围的面积更大。并提出了一个简单的杆件设计方法。
The numerical analysis of cantilevered tubular rods of GFRP under both axial and transverse loads was proposed. A three-dimensional finite element was established to analyze the transverse load-deflection curves and axial force-bending moment curves under different axial loads. The model is built to solve the problem of geometric nonlinearity and layered composite structure. When the failure of the material is calculated according to the Tsal-Wu failure criterion or the overall structural instability, it represents the structural failure. The experimental results show the validity of the model. The parametric analysis of the bars considering different layer angles and intersections, different diameter to thickness ratio (D / t) and length to diameter ratio (L / D) shows that when the D / t is smaller, with the increase of L / D, The faster the axial strength of the rod drops. At a certain D / t value, the GFRP layered structure has a significant influence on the axial strength and flexural strength. The research also shows that the curve of axial force-bending moment is generally linear. Increasing the content of the longitudinal fibers in the layer or decreasing the angle of the fibers with respect to the longitudinal direction of the member allows the area of the relationship curve to be larger. And put forward a simple method of bar design.