Crack growth trajectory prediction in V-notched polymeric specimen under combined compressive-shear loading conditions

Torabi, Ali Reza; Bahrami, Bahador; Ayatollahi, Majid Reza

Document Type : Research Paper

Authors

¹ - Faculty of New Sciences & Technologies, University of Tehran, Tehran, Iran

² - School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran

³ Professor, School of Mechanical Engineering, Iran University of Science and Technology, Tehran, Iran

Abstract

Crack growth trajectory in V-notched specimens is investigated by polymeric round-tip V-notched Brazilian disk (RV-BD) under combined compressive-shear loading conditions both experimentally and theoretically. First, the experimental fracture trajectory of RV-BD specimens is obtained by means of 18 fracture tests for various notch opening angles and 0.5 mm notch tip radius. Then, by utilizing two methods, namely the extended finite element method (XFEM) based on the cohesive zone model and the incremental method on the basis of the maximum tangential stress (MTS criterion), the fracture trajectory is predicted. Predictions of both the methods and also the experimental observations show that although the V-notch is under compressive-shear loading conditions, fracture initiates due to the tensile stresses at the notch border and propagates to the external boundary of the specimen. The graphical agreement of the two predicted trajectories with the experimental one demonstrates the ability of both methods in predicting the fracture trajectory for V-notches under compressive-shear loading conditions.

Keywords

Main Subjects

Creep,Fatigue,Fracture

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Crack growth trajectory prediction in V-notched polymeric specimen under combined compressive-shear loading conditions

References

Volume 4, Issue 3December 2017Pages 337-346

Volume 4, Issue 3
December 2017
Pages 337-346