A physics-based acoustic emission energy method for mixed-mode impact damage prediction of composite laminates

IF 3.8 2区 物理与天体物理 Q1 ACOUSTICS
Jingjing He , Fan Yang , Haixu Wang , Xiaojun Sun , Yu Zhu , Yaokun Wang , Xuefei Guan
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Abstract

In-service composite laminates are susceptible to impact-induced damage, which can substantially reduce its integrity and service life. The damage prediction remains a great challenge due to mixed damage modes and varying damage patterns. This study develops a novel acoustic emission (AE) energy method for predicting damage areas under three typical damage modes. Laboratory testing of composite laminate specimens subject to quasi-static indentation is performed in conjunction with in-situ AE monitoring to acquire AE data. By bridging two sets of energy formulations developed, namely, the one that correlates the damage area and the released strain energy of each damage mode and another that relates the released strain energy to the AE energy, an analytical model for predicting damage areas using AE energy components is derived. Proper signal procedure procedures are established to extract the energy components from AE monitoring data, and numerical and testing data are used to calibrate the model parameters. The effectiveness of the proposed model is further validated by comparing the prediction results of the damage areas with the actual damage areas of specimens tested under different indentation depths. The result indicates that the proposed AE energy method can yield reliable predictions of the damage area under mixed damage modes.
基于物理的声发射能量法,用于复合材料层压板的混合模式冲击损伤预测
使用中的复合材料层压板很容易受到冲击引起的损坏,这会大大降低其完整性和使用寿命。由于混合损伤模式和不同的损伤模式,损伤预测仍然是一个巨大的挑战。本研究开发了一种新型声发射(AE)能量方法,用于预测三种典型损坏模式下的损坏区域。在对受到准静态压痕的复合材料层压板试样进行实验室测试的同时,还进行了原位 AE 监测,以获取 AE 数据。通过将所开发的两套能量公式(即将每种损坏模式的损坏面积和释放应变能相关联的公式,以及将释放应变能与 AE 能量相关联的公式)连接起来,得出了使用 AE 能量成分预测损坏面积的分析模型。建立了从 AE 监测数据中提取能量分量的适当信号程序,并使用数值和测试数据来校准模型参数。通过比较损伤面积的预测结果和不同压痕深度下测试试样的实际损伤面积,进一步验证了所提模型的有效性。结果表明,所提出的 AE 能量方法可以可靠地预测混合损伤模式下的损伤面积。
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
Ultrasonics
Ultrasonics 医学-核医学
CiteScore
7.60
自引率
19.00%
发文量
186
审稿时长
3.9 months
期刊介绍: Ultrasonics is the only internationally established journal which covers the entire field of ultrasound research and technology and all its many applications. Ultrasonics contains a variety of sections to keep readers fully informed and up-to-date on the whole spectrum of research and development throughout the world. Ultrasonics publishes papers of exceptional quality and of relevance to both academia and industry. Manuscripts in which ultrasonics is a central issue and not simply an incidental tool or minor issue, are welcomed. As well as top quality original research papers and review articles by world renowned experts, Ultrasonics also regularly features short communications, a calendar of forthcoming events and special issues dedicated to topical subjects.
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