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A unified cohesive zone model for simulating adhesive failure of composite structures and its parameter identification

机译：模拟复合结构粘结破坏的统一内聚区模型及其参数辨识

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摘要

It has been proven that the shape effect of different cohesive laws can not be ignored in many cases. Such an effect is further investigated and clarified in the present paper. In order to more accurately simulate the adhesive failures of composite structures, it is necessary to develop a unified cohesive zone model (CZM) capable of approaching an arbitrary existing cohesive law. Toward this end, an improved interpolation-based CZM (ICZM) has been developed. The parameters of such a model were generally obtained by inverse analysis. However, success of the inverse analysis greatly depends on the initial guess of model parameters and its analysis technique. Therefore, a two-step inverse analysis method, perfectly matching the present ICZM, has been further developed in our work. The verifications based on both pseudo-experimental and real experimental data have shown that the present developed model and method are robust and can uniformly describe various adhesive failures without need to consider selection of appropriate CZM for different types of fracture problems. Finally, a novel inverse analysis method in combination with two types of experimental information, has been developed to improve the solution reliability and relieve the ill-posed extent of inverse problems.
机译：已经证明，在许多情况下，不同的内聚规律的形状效应是不容忽视的。在本文中将进一步研究和澄清这种效果。为了更准确地模拟复合结构的粘合破坏，有必要开发一种能够逼近任意现有内聚规律的统一内聚区模型（CZM）。为此，已经开发了一种改进的基于插值的CZM（ICZM）。通常通过反分析获得这种模型的参数。但是，反分析的成功很大程度上取决于对模型参数及其分析技术的初步猜测。因此，在我们的工作中还进一步开发了与当前ICZM完美匹配的两步反分析方法。基于伪实验和真实实验数据的验证表明，本开发的模型和方法是鲁棒的，可以统一描述各种胶粘剂失效，而无需考虑针对不同类型的断裂问题选择合适的CZM。最后，结合两种类型的实验信息，开发了一种新颖的逆分析方法，以提高解的可靠性并减轻逆问题的不适定程度。

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  • 来源
    《Composite Structures》 |2017年第12期|555-565|共11页
  • 作者

    Xu Yangjian; Guo Yuanqi; Liang Lihua; Liu Yong; Wang Xiaogui;

  • 作者单位

    Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Zhejiang, Peoples R China;

    Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Zhejiang, Peoples R China;

    Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Zhejiang, Peoples R China;

    Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Zhejiang, Peoples R China;

    Zhejiang Univ Technol, Coll Mech Engn, Hangzhou 310014, Zhejiang, Peoples R China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    Cohesive zone model; Inverse analysis; DIC; Adhesive failure; Shape effect;

    机译：内聚力区模型;反分析;DIC;胶粘破坏;形状效应;

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