缠绕型CFRP圆管轴压力学性能
发布时间：2019-07-06 15:10
【摘要】：缠绕型CFRP管由于其编织角度的灵活性可以根据需要设计出力学性能不同的管构件,而缠绕型CFRP管的受力安全性能是其分析和应用的基本问题之一。首先对3种不同缠绕角度和长细比CFRP管进行压缩试验,着重观察了树脂基碳纤维增强复合材料的刚度、极限强度以及细观破坏模式。其次基于Chamis C.C.刚度修正模型、开发了可以模拟各向异性材料拉压双模量的本构子程序(Usermat),从而将Chamis C.C.刚度修正模型导入ANSYS主程序中。并采用复合材料Hashin破坏准则验证了其本构模型。在此基础上,对加载过程进行了数值模拟,与试验结果进行比较,证明本构模型具有很好的适应性。最后基于试验结果与数值分析结果,得到了缠绕型CFRP细长管屈曲荷载计算公式。
文内图片：
图片说明：试验试件Fig.2Testspecimens
[Abstract]:Because of the flexibility of braided angle of wound CFRP tube, the pipe components with different mechanical properties can be designed according to the needs, and the mechanical safety performance of wound CFRP tube is one of the basic problems in its analysis and application. Firstly, three kinds of CFRP tubes with different winding angles and slenderness ratio were tested, and the stiffness, ultimate strength and meso-failure mode of resin-based carbon fiber reinforced composites were observed. Secondly, it is based on Chamis C.C. The stiffness correction model is modified, and the native subroutine (Usermat), which can simulate the tensile and compression double modulus of anisotropic materials, is developed, so that the Chamis C.C. The stiffness correction model is imported into the main program of ANSYS. The Hashin failure criterion of composite materials is used to verify the constitutive model. On this basis, the numerical simulation of the loading process is carried out, and compared with the experimental results, it is proved that the constitutive model has good adaptability. Finally, based on the experimental results and numerical analysis results, the formula for calculating the buckling load of wound CFRP slender tubes is obtained.
【作者单位】： 沈阳农业大学水利学院;哈尔滨工业大学土木工程学院;
【基金】：国家自然科学基金项目(51378150)
【分类号】：TB332
本文编号：2511108
文内图片：
图片说明：试验试件Fig.2Testspecimens
[Abstract]:Because of the flexibility of braided angle of wound CFRP tube, the pipe components with different mechanical properties can be designed according to the needs, and the mechanical safety performance of wound CFRP tube is one of the basic problems in its analysis and application. Firstly, three kinds of CFRP tubes with different winding angles and slenderness ratio were tested, and the stiffness, ultimate strength and meso-failure mode of resin-based carbon fiber reinforced composites were observed. Secondly, it is based on Chamis C.C. The stiffness correction model is modified, and the native subroutine (Usermat), which can simulate the tensile and compression double modulus of anisotropic materials, is developed, so that the Chamis C.C. The stiffness correction model is imported into the main program of ANSYS. The Hashin failure criterion of composite materials is used to verify the constitutive model. On this basis, the numerical simulation of the loading process is carried out, and compared with the experimental results, it is proved that the constitutive model has good adaptability. Finally, based on the experimental results and numerical analysis results, the formula for calculating the buckling load of wound CFRP slender tubes is obtained.
【作者单位】： 沈阳农业大学水利学院;哈尔滨工业大学土木工程学院;
【基金】：国家自然科学基金项目(51378150)
【分类号】：TB332
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