Design of a novel bonded-SENB specimen for determining the pure modes and the mixed-mode cohesive fracture energies in brittle and quasi-brittle adhesives

IF 5 2区工程技术 Q1 ENGINEERING, MECHANICAL

Theoretical and Applied Fracture Mechanics Pub Date : 2025-03-12 DOI:10.1016/j.tafmec.2025.104924

Ghazaal Talebi Sanami , Jamal Bidadi , Mohammad Reza Gheibi , Hamed Saeidi Googarchin

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引用次数: 0

Abstract

Integrating fracture and damage mechanics with numerical methods in commercial software is essential for predicting the failure of structural adhesive joints. These joints often face complex loading conditions and fracture in a mixed-mode (tensile/shear) manner. Understanding the fracture energy of the adhesive in all loading conditions is crucial and requires precise measurement methods. While various laboratory specimens with different shapes and loading configurations have been proposed to study cracking behavior and fracture energy under pure modes or mixed-mode loading, some have practical limitations. This research introduces a new test configuration, bonded-SENB, for measuring the full range of fracture energies in brittle and quasi-brittle adhesive joints. This specimen is easy to prepare and test. A data reduction scheme based on the contour integral framework in ABAQUS is employed to investigate the effects of crack length and loading span on the fracture parameters. The fracture envelopes from this specimen are compared with results from conventional methods like double-cantilever beam (DCB) and end-notched flexure (ENF) tests, yielding strong agreement with standard fracture energy measurements.

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设计用于确定脆性和准脆性粘合剂纯模式和混合模式内聚断裂能的新型粘合-SENB 试样

将断裂和损伤力学与商用软件中的数值方法相结合，对于预测结构粘接接头的失效至关重要。这些接头通常面临复杂的加载条件，并以混合模式（拉伸/剪切）方式断裂。了解粘合剂在所有加载条件下的断裂能至关重要，需要精确的测量方法。虽然已经提出了各种不同形状和加载配置的实验室试样来研究纯模式或混合模式加载下的开裂行为和断裂能，但其中一些试样存在实际局限性。本研究引入了一种新的测试结构--粘接-SENB，用于测量脆性和准脆性粘接接头的全部断裂能。这种试样易于制备和测试。采用基于 ABAQUS 中轮廓积分框架的数据还原方案来研究裂缝长度和加载跨度对断裂参数的影响。该试样的断裂包络线与双悬臂梁（DCB）和端部缺口挠曲（ENF）测试等传统方法得出的结果进行了比较，结果与标准断裂能测量值非常一致。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Theoretical and Applied Fracture Mechanics 工程技术-工程：机械

CiteScore

8.40

自引率

18.90%

发文量

435

审稿时长

37 days

期刊介绍： Theoretical and Applied Fracture Mechanics'' aims & scopes have been re-designed to cover both the theoretical, applied, and numerical aspects associated with those cracking related phenomena taking place, at a micro-, meso-, and macroscopic level, in materials/components/structures of any kind. The journal aims to cover the cracking/mechanical behaviour of materials/components/structures in those situations involving both time-independent and time-dependent system of external forces/moments (such as, for instance, quasi-static, impulsive, impact, blasting, creep, contact, and fatigue loading). Since, under the above circumstances, the mechanical behaviour of cracked materials/components/structures is also affected by the environmental conditions, the journal would consider also those theoretical/experimental research works investigating the effect of external variables such as, for instance, the effect of corrosive environments as well as of high/low-temperature.