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首页> 外文期刊>Composites Science and Technology >On the optimal design of manufacturing-induced residual stresses in filament wound carbon fiber composite cylindrical shells reinforced with carbon nanotubes
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On the optimal design of manufacturing-induced residual stresses in filament wound carbon fiber composite cylindrical shells reinforced with carbon nanotubes

机译：碳纳米管增强的缠绕碳纤维复合材料圆柱壳中制造引起的残余应力的优化设计

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Process-induced residual stresses occur in composite structures composed of dissimilar materials. As these residual stresses could result in fracture, their consideration when designing composite parts is necessary. In this research, the residual stresses behavior is characterized in terms of three manufacturing features including 'environmental', 'materialistic' and 'dimensional' features. In experimental part, after the fabrication of carbon nanotubes (CNTs) reinforced composite shells, the slitting technique is employed to measure the released strains. Then, the elements of the stiffness matrix are obtained accomplishing an extensive computational modeling in ANSYS commercial software. The obtained results of experimental and computational parts are correlated using a MATLAB programming code, and residual stresses are calculated by calibration factors. Additionally, a statistical analysis is carried out to analyze the influence of mentioned parameters in overall scale. The experimental results had a good agreement with the analytical ones. Finally, this study highlights the complexity and the multifaceted characteristic of residual stresses development in terms of mentioned parameters in CNT-reinforced carbon fiber composite shells.
机译：过程引起的残余应力出现在由不同材料组成的复合结构中。由于这些残余应力可能导致断裂，因此在设计复合零件时必须考虑它们。在这项研究中，残余应力行为以三个制造特征为特征，包括“环境”，“物质”和“尺寸”特征。在实验部分，在制造碳纳米管（CNTs）增强的复合壳之后，采用纵缝技术来测量释放的应变。然后，获得刚度矩阵的元素，以在ANSYS商业软件中完成广泛的计算建模。使用MATLAB编程代码对获得的实验和计算部件的结果进行关联，并通过校准因子计算残余应力。另外，进行统​​计分析以分析提到的参数在总体规模上的影响。实验结果与分析结果吻合良好。最后，本研究从碳纳米管增强碳纤维复合材料壳中提到的参数出发，强调了残余应力发展的复杂性和多方面的特征。

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