Mode II fracture energy characterization of brittle adhesives using compliance calibration method

• Type: Article in International Scientific Journal
• Date: 2020

Authors

Akhavan Safar, A (Author) Other; Salamat talab, M (Author) Other; Ajdani, A (Author) Other; Ayatollahi, MR (Author) Other; da Silva, LFM (Author) FEUP

Journal

Title: Fatigue & Fracture of Engineering Materials & Structures

Vol. 43

Pages: 1928-1937

ISSN: 8756-758X

Publisher: Wiley-Blackwell

Indexing

ISI Web of Knowledge - 1 Citation

Scopus - 2 Citations

Other information

Authenticus ID: P-00S-JQM

DOI: 10.1111/ffe.13244

Abstract (EN): The end-notched flexure (ENF) test is widely used for measuring the Mode II critical strain energy release rate of adhesively bonded joints (ABJs). Unstable crack growth in ENF joints with brittle adhesives is a common phenomenon. Classic data reduction methods like the direct beam theory (DBT) and the compliance-based beam method (CBBM) usually result in unacceptable scatter when crack grows unstable. In this study, the application of a compliance calibration method (CCM) for ENF adhesive joints with a brittle adhesive is experimentally investigated. For this purpose, ENF specimens were manufactured and tested. Different data reduction methods were considered for treating the results. Afterwards, the obtained fracture energies were used as an input parameter in a finite element (FE) analysis with a cohesive zone model to evaluate the validity of the experimental data. It is shown that the fracture loads obtained by the CCM have the best agreement with the experimental ones comparing with the other data reduction approaches. To study the effect of geometry on the CCM results, ENF specimens with different adhesive thicknesses, substrate thicknesses and span lengths were also considered in this study, and some general conclusions are made about the geometrical parameters effect on the Mode II fracture energy.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 10