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首页> 外文期刊>Journal of aerospace engineering >Simple and Fast Method to Calculate Shape Factors of Stiffened Panels Repaired with Composites
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Simple and Fast Method to Calculate Shape Factors of Stiffened Panels Repaired with Composites

机译：计算复合材料修复加筋板的形状因子的简便方法

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摘要

In this paper, a new, simple, and robust method is presented to calculate the shape factor and stress intensity factor (SIF) of cracked stiffened panels in a mode-I condition repaired with a single-side composite patch. For this purpose, huge finite element (FE) analyses are carried out to achieve a simple equation using normalized parameters and a fitting technique for a vast range of repaired stiffened panels. The parametric study was performed using five effective parameters, including crack length, stiffeners and panel moment of inertia, material, and thickness of the composite patch. Using the proposed formulation in this paper, performing the complex and time-consuming FE analyses to calculate the stress intensity factors for such repaired complex components is not necessary. The obtained results are verified using several FE models. The maximum differences between the predicted shape factors using the proposed equation with those obtained from FE analyses are indicated to be approximately 7%, which is acceptable for engineering purposes. (c) 2019 American Society of Civil Engineers.
机译：本文提出了一种新的，简单而可靠的方法来计算单侧复合补片修复的I型条件下裂纹加劲板的形状因子和应力强度因子（SIF）。为此，进行了巨大的有限元（FE）分析，以使用归一化参数和适用于各种修复后的加筋板的拟合技术来获得简单方程式。使用五个有效参数进行了参数研究，包括裂纹长度，加劲肋和面板惯性矩，复合材料的材料和厚度。使用本文提出的公式，无需进行复杂而费时的有限元分析来计算此类修复后的复杂部件的应力强度因子。使用几种有限元模型验证了获得的结果。使用所提出的方程式与从有限元分析获得的形状系数之间的预测形状系数之间的最大差异显示为大约7％，这对于工程目的是可以接受的。 （c）2019美国土木工程师学会。

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