基于声发射和DIC的CFRP搭接表面粗糙度取向影响评价

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

Materials Evaluation Pub Date : 2023-06-01 DOI:10.32548/2023.me-04326

L. S. Mane, M. Bhat

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引用次数: 0

摘要

研究了砂磨表面粗糙度取向对碳纤维增强聚合物(CFRP)单搭接接头抗剪强度的影响。为此，在SLJ的重叠区域考虑了与附着体纵轴夹角为0°、45°和90°的三种粗糙度模式。通过基于接触的粗糙度测量和水滴与附着面的接触角来表征表面粗糙度。采用数字图像相关(DIC)技术对试件抗剪强度进行了全应变场测量。重叠端剥离应力和剪切应力在90°板板中最大，在0°板板中最小。在SLJ抗剪强度测试中进行了声发射测试(AE)。研究表明，粘结接头界面处的表面粗糙度取向对声发射产生影响。发现声发射命中数和振幅参数分布随取向的变化而变化。90°样品声发射命中数最多，0°样品声发射命中数最少。

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Evaluation of Influence of Surface Roughness Orientation in CFRP Lap Joints using AE and DIC

This paper investigates the effects of emery abraded surface roughness orientation on the shear strength of the carbon fiber reinforced polymer (CFRP) single lap joint (SLJ). For this purpose, three roughness patterns of angles 0°, 45°, and 90° with the longitudinal axis of adherend were considered in the overlap area of the SLJ. The surface roughness was characterized by contact-based roughness measurement and contact angle between the water droplet and the adherend surface. Through-the-thickness full-strain field measurement was carried out during shear strength tests using digital image correlation (DIC). The peel and shear stress at the overlap end were highest in the 90° coupons and least in 0° coupons. Acoustic emission testing (AE) was carried out during the shear strength testing of the SLJ. The investigation proves that the surface roughness orientation at the interface of bonded joints affects the acoustic emissions generated. AE hits and amplitude parameter distribution was found to change with the change in orientation. AE hits were more in 90° samples and least in 0° samples.

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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.