双稳态复合材料层合结构的黏弹性模型

发布时间：2018-07-03 08:04

本文选题：纤维复合材料 + 有限元法　；参考：《复合材料学报》2016年10期

【摘要】：为探明双稳态复合材料层合结构在复杂环境条件下的应用,对双稳态复合材料层合结构的黏弹性行为进行了研究。首先,将纤维简化为弹性材料,考虑基底材料的黏弹性行为。然后,根据纤维和基底的材料属性,通过理论分析得到了双稳态复合材料层合结构的黏弹性材料属性;根据经典层合板理论、最小应变能原理和Maxwell黏弹性模型建立了双稳态复合材料层合结构的黏弹性模型,通过理论分析得到其第二稳态主曲率与扭曲率随加载时间和温度的变化关系。同时,利用有限元软件ABAQUS及其子程序UMAT建立了相应的有限元模型,研究了加载时间和温度对层合结构第二稳态性能的影响。理论与模拟结果均表明:层合结构第二稳态主曲率随加载时间的延长和温度的升高而增大;扭曲率随加载时间的延长而减小,一般情况下随温度的升高而增大,但在加载时间较长且温度较高时,可能会出现扭曲率随温度升高而减小的情况。理论计算结果与有限元模拟结果的比较显示两者吻合较好,可以通过有限元模拟对双稳态复合材料层合结构的黏弹性行为进行研究。
[Abstract]:In order to investigate the application of bistable composite laminated structure in complex environment, the viscoelastic behavior of bistable composite laminated structure was studied. Firstly, the fiber is simplified as an elastic material, and the viscoelastic behavior of the substrate is considered. Then, according to the material properties of fiber and substrate, the viscoelastic properties of bistable composite laminates are obtained by theoretical analysis. The minimum strain energy principle and Maxwell viscoelastic model are used to establish the viscoelastic model of bistable composite laminated structure. The relationship between the second steady state principal curvature and distortion rate with loading time and temperature is obtained by theoretical analysis. At the same time, the finite element model is established by using the finite element software Abaqus and its subprogram UMAT, and the influence of loading time and temperature on the second steady-state performance of laminated structure is studied. The theoretical and simulation results show that the second steady-state principal curvature of laminated structures increases with the increase of loading time and temperature, and the distortion rate decreases with the increase of loading time, and generally increases with the increase of temperature. However, when the loading time is longer and the temperature is higher, the distortion rate may decrease with the increase of temperature. The theoretical results are in good agreement with the finite element simulation results. The viscoelastic behavior of bistable composite laminated structures can be studied by finite element simulation.
【作者单位】：浙江工业大学特种装备制造与先进加工技术教育部/浙江省重点实验室;
【基金】：国家自然科学基金(51675485) 浙江省自然科学基金(LY15E050016) 高等学校博士学科点专项科研基金(20123317120003)
【分类号】：TB33

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