一种基于非线性兰姆波响应的用于定位复合材料层压板分层损伤的混合方法。

A hybrid method based upon nonlinear Lamb wave response for locating a delamination in composite laminates.

作者信息

Yelve Nitesh P, Mitra Mira, Mujumdar P M, Ramadas C

机构信息

Department of Aerospace Engineering, Indian Institute of Technology Bombay, Mumbai 400076, India.

出版信息

Ultrasonics. 2016 Aug;70:12-7. doi: 10.1016/j.ultras.2016.04.012. Epub 2016 Apr 19.

DOI:10.1016/j.ultras.2016.04.012

PMID:27115575

Abstract

A new hybrid method based upon nonlinear Lamb wave response in time and frequency domains is introduced to locate a delamination in composite laminates. In Lamb wave based nonlinear method, the presence of damage is shown by the appearance of higher harmonics in the Lamb wave response. The proposed method not only uses this spectral information but also the corresponding temporal response data, for locating the delamination. Thus, the method is termed as a hybrid method. The paper includes formulation of the method and its application to locate a Barely Visible Impact Damage (BVID) induced delamination in a Carbon Fiber Reinforced Polymer (CFRP) laminate. The method gives the damage location fairly well. It is a baseline free method, as it does not need data from the pristine specimen.

摘要

本文介绍了一种基于非线性兰姆波时域和频域响应的新混合方法，用于定位复合材料层合板中的分层损伤。在基于兰姆波的非线性方法中，损伤的存在通过兰姆波响应中高次谐波的出现来体现。所提出的方法不仅利用了这种频谱信息，还利用了相应的时域响应数据来定位分层损伤。因此，该方法被称为混合方法。本文包括该方法的公式推导及其在定位碳纤维增强聚合物（CFRP）层合板中由轻微可见冲击损伤（BVID）引起的分层损伤方面的应用。该方法能较好地给出损伤位置。它是一种无需基线的方法，因为它不需要原始试件的数据。