A review on failure theories and simulation models for adhesive joints

Abstract

In the framework of the Cost Action CERTBOND (Reliable roadmap for certification of bonded primary structures), a wide group of researchers from 27 European Countries have had the opportunity to work on the topic of certification of bonded joints for primary structural applications from different engineering sectors such as the aerospace, automotive, civil engineering, wind energy and marine sectors. Since virtual testing and optimization are basic tools in the certification process, one of the key objectives of CERTBOND is to critically review some of the available models and failure theories for adhesive joints. The present paper summarizes the outcome of this task. Nine different models/theories are described in detail. Specifically, reviewed are the Classical Analytical Methods, the Process Zone Methods, Linear Elastic Fracture Mechanics (LEFM), the Virtual Crack Closure Technique (VCCT), the Stress Singularity Approach, Finite Fracture Mechanics (FFM), the Cohesive Zone Method (CZM), the Progressive Damage Modeling method and the Probabilistic methods. Also, at the end of the paper, the modeling of temperature effects on adhesive joints have been addressed. For each model/theory, information on the methodology, the required input, the main results, the advantages and disadvantages and the applications are given.

Bonded flush repairs for aerospace composite structures: A review on modelling strategies and application to repairs optimization, reliability and durability

“…Analytical models for bonded joints were already reviewed [15,[52][53][54][55]. Comprehensive reviews of static strength prediction methods for bonded joints [56][57][58], including numerical models and damage modelling were proposed. Therefore, this section aims to highlight the specific aspects of scarf and stepped repairs modelling, and to discuss the representativeness of a flush joint model to study a flush repair.…”

Modelling load transfer in single-lap adhesively bonded and hybrid (bolted / bonded) joints

“…This section is based on existing theories in the literature. There is no attempt here to deliver an exhaustive literature review and the reader can refer to dedicated publications [31][32][33][34][35].…”

Development and Numerical Implementation of a Modified Mixed-Mode Traction–Separation Law for the Simulation of Interlaminar Fracture of Co-Consolidated Thermoplastic Laminates Considering the Effect of Fiber Bridging

“…Numerical analyses were held in this stage to determine the behavior for the co-consolidated laminates under mixed mode loading. The simple bilinear T–SL was implemented through the LS Dyna’s MAT_138 material model [ 40 ]. The numerical implementation of the finally developed model of the modified tri-linear T–SL was studied in two ways.…”