无裂纹测量的结构粘接断裂韧性评价

IF 0.5 4区材料科学 Q4 MATERIALS SCIENCE, MULTIDISCIPLINARY

Materia-rio De Janeiro Pub Date : 2021-01-25 DOI:10.1590/S1517-707620210001.1217

Jonnas Santos Alves, P. Kenedi, S. Barros

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引用次数: 2

摘要

采用两种模型对ENF试件进行三点弯曲单调试验时的裂纹长度进行测量，得到了II型(IIC)结构粘接接头的抗粘接断裂性能。荷载与横向位移的结果采用了两种不同的方法:损伤模型和粘聚区模型。前者用于裂纹扩展不稳定的试验，后者用于裂纹扩展稳定的试验。这些初步结果表明了模型的可行性，并表明:初始裂纹长度和横向荷载率;对IIC的评价有很大的影响。关键词:结构粘接，ENF试样，断裂力学。

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Evaluation of structural adhesive joints fracture toughness without crack measurement

The adhesive fracture resistance of structural adhesive joints in mode II, IIC, is accessed through the application of two models that prescind of the measurement of the crack length during the subjection of ENF specimens to three-point bending monotonic tests. The load vs transversal displacement results are used in two different approaches: a damage model and a cohesive zone model. The first one was used in test where the crack propagation was unstable and the second one was used for stable crack propagations. These initial results show the viability of the models and show that both: initial crack length and transversal load rate; have great influence in IIC evaluation. Keywords: structural adhesive joints, ENF specimens, fracture mechanics.

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来源期刊

Materia-rio De Janeiro MATERIALS SCIENCE, MULTIDISCIPLINARY-

CiteScore

1.00

自引率

25.00%

发文量

审稿时长

6 weeks

期刊介绍： All the articles are submitted to a careful peer-reviewing evaluation process by the journal''s Editorial Board. The Editorial Board, reviewers and authors make use of a web based proprietary automated tool to deal with the reviewing procedures.the Revista Matéria''s article reviewing restricted access system - SEER. Authors are not informed about the identity of the reviewers.