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Using DIC technique to characterize the mode II interface fracture of layered system composed of multiple materials

机译：使用DIC技术表征由多种材料组成的分层系统的II型界面断裂

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摘要

This article introduces a new method developed for characterizing the mode-II dominant interfacial fracture in a layered system composed of materials with significantly different mechanical properties. The proposed method consists of 3 parts. First, using digital image correlation (DIC) technique to acquire the full field strain in layered composites and then calculating the variation of elastic strain energy in multiple loading steps. Second, using DIC to acquire the relative displacement between layers and then calculating the possible strain energy release rates in multiple loading steps based on a presumptive bi-linear cohesive zone model (CZM) with unknown parameters. Third, developing an algorithm to find the optimal solutions for the presumptive bi-linear CZM by equilibrating the elastic strain energy and fracture energy with the minimum error in multiple loading steps. For verification, the proposed method was applied to characterize the mode II dominated interface fracture of a bi-material and bi-layer system under tension. The feasibility and accuracy of the proposed method are experimentally demonstrated.
机译：本文介绍了一种新的方法，该方法用于表征由机械性能显着不同的材料组成的分层系统中的II型显性界面断裂。所提出的方法包括三个部分。首先，使用数字图像相关（DIC）技术获取层状复合材料的全场应变，然后计算多个加载步骤中弹性应变能的变化。其次，使用DIC获取层之间的相对位移，然后基于具有未知参数的推定双线性内聚力区域模型（CZM），计算多个加载步骤中可能的应变能释放速率。第三，开发一种算法，通过在多个加载步骤中以最小误差平衡弹性应变能和断裂能，找到推定双线性CZM的最佳解。为了进行验证，将所提出的方法应用于表征在张力作用下的双材料和双层系统的II型主导界面断裂。实验证明了该方法的可行性和准确性。

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  • 来源
    《Composite Structures》 |2019年第12期|111413.1-111413.10|共10页
  • 作者

  • 作者单位

    Tongji Univ Coll Civil Engn Dept Disaster Mitigat Struct Shanghai 200092 Peoples R China|Tongji Univ Key Lab Performance Evolut & Control Engn Struct Minist Educ Shanghai 200092 Peoples R China;

    Tongji Univ Coll Civil Engn Dept Disaster Mitigat Struct Shanghai 200092 Peoples R China;

    Shanghai Real Estate Sci Res Inst Shanghai 200092 Peoples R China|Shanghai Housing Qual Inspect Stn Shanghai 200092 Peoples R China;

    FMAU FSU Coll Engn Dept Civil & Environm Engn Tallahassee FL 32310 USA;

    Chongqing Univ Key Lab New Technol Construct Cities Mt Area Minist Educ Chongqing 400045 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

    Multi-material; Delamination; Mode-II interfacial fracture; Digital image correlation;

    机译：多种材料;分层;II型界面骨折;数字图像关联;

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