航空学报 > 2015, Vol. 36 Issue (8): 2620-2650   doi: 10.7527/S1000-6893.2015.0148

加载速率对层间断裂韧性的影响

李玉龙, 刘会芳   

  1. 西北工业大学 航空学院, 西安 710072
  • 收稿日期:2015-05-13 修回日期:2015-05-17 出版日期:2015-08-15 发布日期:2015-06-01
  • 通讯作者: 李玉龙 男, 博士, 教授。《航空学报》第七、八届编委。主要研究方向: 材料与结构的动力学响应, 振动疲劳, 复合材料力学, 动态断裂。Tel: 029-88494859 E-mail: liyulong@nwpu.edu.cn E-mail:liyulong@nwpu.edu.cn
  • 作者简介:刘会芳 女, 博士研究生。主要研究方向: 复合材料力学, 动态断裂。E-mail: fenghuang1108@163.com
  • 基金资助:

    国家自然科学基金(11372256)

Loading rate effect on interlaminar fracture toughness

LI Yulong, LIU Huifang   

  1. School of Aeronautics, Northwestern Polytechnical University, Xi'an 710072, China
  • Received:2015-05-13 Revised:2015-05-17 Online:2015-08-15 Published:2015-06-01
  • Contact: 10.7527/S1000-6893.2015.0148 E-mail:liyulong@nwpu.edu.cn
  • Supported by:

    National Natural Science Foundation of China (11372256)

摘要:

虽然加载速率对层间断裂的影响已经被广泛的研究,但是现有的研究结果还未能给出加载速率对层间断裂韧性影响的明确趋势。研究人员发展了许多测量层合板复合材料以及胶接层断裂韧性的实验方法。本文的主要目的是对层间断裂韧性测量的实验方法进行综述,尤其是准静态和动态加载条件下层间起裂韧性的测量。首先介绍了准静态下Ⅰ型、Ⅱ型以及Ⅰ/Ⅱ复合型层间断裂韧性的测量方法,然后综述动态加载下层间断裂韧性的实验方法。前两部分着重介绍断裂实验中断裂参数(载荷、位移、起裂时间以及裂纹长度)的测量以及断裂韧性的计算。之后又综述了两种光学测量方法在层间断裂实验中的应用。最后将文献中加载速率对层间断裂韧性影响的实验研究结果进行了总结。

关键词: 断裂韧性, 加载速率, 复合材料, 粘接, 数字图像相关

Abstract:

Loading rate effect on the interlaminar fracture toughness has been extensively investigated. However, a study of the published literature indicates that considerable disagreement still exists and a clear understanding of this highly important issue has yet to be achieved. Various loading configurations and the corresponding experimental methods have been developed to date for measuring dynamic interlaminar fracture toughness of laminated composites and adhesive joints. The main purpose of this paper is to review the interlaminar fracture test, especially the technique to gain the initiation fracture toughness under quasi-static and dynamic loading conditions. Firstly, the experimental technics to measure Mode I, Mode II and Mode I/II interlaminar fracture toughness under quasi-static loading conditions are introduced. Secondly, experimental methods to study the dynamic interlaminar fracture mechanisms are reviewed. These two parts focus on the methods used for determining fracture parameters (load, displacement, initial fracture time, crack length) and fracture toughness, such as theoretical formula, FEM and strain gauges, especially for the dynamic experiments. In the third part of the paper, two main optical measurement techniques used in interlaminar fracture tests are introduced. The last part summaries many of the reported findings of the loading rate effect on the interlaminar fracture toughness.

Key words: fracture toughness, loading rate, composites, adhesive, DIC

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