Micro-buckling of carbon fibers in shape memory polymer composites under bending in the glass transition temperature region

IF 1.1 Q4 MECHANICS

Curved and Layered Structures Pub Date : 2021-01-01 DOI:10.1515/cls-2021-0009

N. Tiwari, A. Shaikh

引用次数: 3

Abstract

Abstract The influence of a wide temperature range in the glass transition region of a shape memory polymer (SMP) matrix on micro-buckling of the fiber reinforcements in shape memory polymer composites (SMPC) under large bending deformation is described. Analytical expressions to estimate the strain energy, neutral strain surface, critical buckling surface and half wavelength of the buckled fibers in the SMPC are presented based on the minimum energy method. This study considers the reinforced fibers as three-dimensional elastic bodies and the matrix as a temperature stimulated flat plate. A comprehensive study was performed to understand the dynamic temperature behavior of the micro-buckled fibers and corresponding results were validated by previous works in the literature. The effects of fiber volume fraction and thickness of the SMPC plates on the half wavelength are also discussed along with the simultaneous influence of temperature on the parameters computed in the minimum energy analysis.

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形状记忆聚合物复合材料中碳纤维在玻璃化转变温度区弯曲下的微屈曲

摘要研究了形状记忆聚合物(SMP)基体玻璃化过渡区较宽温度范围对形状记忆聚合物复合材料(SMPC)中增强纤维在大弯曲变形下微屈曲的影响。基于最小能量法，给出了SMPC中屈曲纤维的应变能、中性应变面、临界屈曲面和半波长的解析表达式。本研究将增强纤维视为三维弹性体，将基体视为受温度刺激的平板。我们对微屈曲纤维的动态温度行为进行了全面的研究，并对相关结果进行了文献验证。讨论了纤维体积分数和厚度对半波长的影响，以及温度对最小能量分析中计算参数的影响。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Curved and Layered Structures MECHANICS-

CiteScore

2.60

自引率

13.30%

发文量

审稿时长

14 weeks

期刊介绍： The aim of Curved and Layered Structures is to become a premier source of knowledge and a worldwide-recognized platform of research and knowledge exchange for scientists of different disciplinary origins and backgrounds (e.g., civil, mechanical, marine, aerospace engineers and architects). The journal publishes research papers from a broad range of topics and approaches including structural mechanics, computational mechanics, engineering structures, architectural design, wind engineering, aerospace engineering, naval engineering, structural stability, structural dynamics, structural stability/reliability, experimental modeling and smart structures. Therefore, the Journal accepts both theoretical and applied contributions in all subfields of structural mechanics as long as they contribute in a broad sense to the core theme.