Effect of Crack Orientation on Laminated CFRP Composites Using Vibration and Numerical Analysis

IF 0.5 4区材料科学 Q4 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Evaluation Pub Date : 2021-11-01 DOI:10.32548/2021.me-04205

Essam B. Moustafa, K. Almitani, H. Hussein

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引用次数: 1

Abstract

Crack orientation, a critical parameter, significantly affects the dynamic properties of composite structures. Experimental free vibration tests were conducted on carbon fiber–reinforced polymer (CFRP) composite plates at room temperature with different crack orientations. Dynamic properties such as damping ratio, natural frequency, and storage modulus were measured using a four-channel dynamic pulse analyzer. Multi-sensors were mounted on the test plate to pick up the vibration signals. Experimental modal analysis was performed to identify the first three mode shapes of the defective plates. A numerical model using ANSYS software was developed via parametric investigation to predict the correlation between crack orientation and resonant frequencies with corresponding mode shapes. The orientation of the introduced cracks had a significant effect on the dynamic properties of CFRP composites. Vertical cracks had the most significant influence on the eigenvalues of the mode shape frequencies. Furthermore, the damping ratio was an effective method to detect the cracks in CFRP composites.

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裂纹方向对CFRP复合材料层合板的影响——振动与数值分析

裂纹取向是影响复合材料结构动力性能的一个关键参数。对不同裂纹方向的碳纤维增强聚合物（CFRP）复合材料板在室温下进行了自由振动试验。使用四通道动态脉冲分析仪测量了阻尼比、固有频率和储能模量等动态特性。在测试板上安装了多个传感器来采集振动信号。进行了实验模态分析，以确定缺陷板的前三种模态形状。通过参数研究，使用ANSYS软件建立了一个数值模型，以预测裂纹方向与相应振型的共振频率之间的相关性。引入裂纹的方向对CFRP复合材料的动态性能有显著影响。垂直裂纹对振型频率的特征值影响最大。此外，阻尼比是检测CFRP复合材料裂纹的有效方法。

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

Materials Evaluation 工程技术-材料科学：表征与测试

CiteScore

0.90

自引率

16.70%

发文量

审稿时长

6-12 weeks

期刊介绍： Materials Evaluation publishes articles, news and features intended to increase the NDT practitioner’s knowledge of the science and technology involved in the field, bringing informative articles to the NDT public while highlighting the ongoing efforts of ASNT to fulfill its mission. M.E. is a peer-reviewed journal, relying on technicians and researchers to help grow and educate its members by providing relevant, cutting-edge and exclusive content containing technical details and discussions. The only periodical of its kind, M.E. is circulated to members and nonmember paid subscribers. The magazine is truly international in scope, with readers in over 90 nations. The journal’s history and archive reaches back to the earliest formative days of the Society.