弱粘结曲面复合结构在湿热机械荷载作用下的非线性挠度特性

IF 2.9 3区 工程技术 Q2 MECHANICS
Chetan Kumar Hirwani, Ravi Kumar, Erukala Kalyan Kumar, Subrata Kumar Panda
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引用次数: 0

摘要

针对经历大几何变形的内部分离层压复合板开发了一种定制的 MATLAB 算法。该算法旨在计算湿热-机械(HTM)组合载荷作用下的非线性挠度响应。面板上的湿热(HTM)载荷是平面内的,而机械载荷则是横向作用于结构上的。分析采用了各种运动学理论和有限元(FE)技术来计算确定变形。复合材料的变形行为是通过一个宏观机械模型来描述的,该模型考虑到了几何形状的非线性,同时也考虑到了整个面板厚度的拉伸效应。此外,还采用了因环境和/或负载而导致的复合材料属性变化,以实现逼真的响应,同时保留了弱粘接结构各层之间的连续性假设。此外,还通过不同的模型对各种数值示例进行了研究,以说明环境因素和特定设计参数对弱粘结结构抗弯强度的影响。研究结果有力地强调了在研究层状结构时采用不同运动学模型的必要性,无论是否存在高温加载,同时也承认了脱粘的可能性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Nonlinear Deflection Characteristics of Weakly Bonded Curved Composite Structure Under Hygro-Thermo-Mechanical Loadings

A customized MATLAB algorithm is developed for internally separated laminated composite panels experiencing large geometric deformations. The algorithm is designed to calculate nonlinear deflection responses under the effect of combined hygro-thermo-mechanical (HTM) loading. The hygrothermal (HT) load on the panel is in-plane, whereas the mechanical load acts upon the structure transversely. The analysis has adopted various kinematic theories and finite element (FE) techniques to determine the deformations computationally. The deflection behavior of the composite is characterized through a macro mechanical model considering the nonlinearity in geometry with and without accounting for the stretching effects across the panel thickness. Additionally, the changes in composite properties due to the environment and/or loadings are adopted to achieve a realistic response, preserving continuity assumptions between the individual layers of the weakly bonded structure. Moreover, various numerical examples are examined through different models to illustrate the influences of environmental factors and design-specific parameters on the flexural strength of weakly bonded structures. The findings strongly emphasize the necessity of employing diverse kinematic models when examining laminated structures, both with and without HT loading, while also acknowledging the potential for debonding.

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来源期刊
CiteScore
5.80
自引率
11.40%
发文量
116
审稿时长
3 months
期刊介绍: The journal has as its objective the publication and wide electronic dissemination of innovative and consequential research in applied mechanics. IJAM welcomes high-quality original research papers in all aspects of applied mechanics from contributors throughout the world. The journal aims to promote the international exchange of new knowledge and recent development information in all aspects of applied mechanics. In addition to covering the classical branches of applied mechanics, namely solid mechanics, fluid mechanics, thermodynamics, and material science, the journal also encourages contributions from newly emerging areas such as biomechanics, electromechanics, the mechanical behavior of advanced materials, nanomechanics, and many other inter-disciplinary research areas in which the concepts of applied mechanics are extensively applied and developed.
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