Volume 23, Issue 9 (September 2023)
Modares Mechanical Engineering 2023, 23(9): 543-551 |
Back to browse issues page
Download citation:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:
BibTeX | RIS | EndNote | Medlars | ProCite | Reference Manager | RefWorks
Send citation to:
SAYADI S, BAGHBANAN A, JAVADI M, DELGADO-MARTIN J, HASHEMALHOSSEINI H. Effect of Initial Crack Length on Mode I Fracture Toughness of PMMA Using Pseudo Compact Tension Test. Modares Mechanical Engineering 2023; 23 (9) :543-551
URL: http://mme.modares.ac.ir/article-15-69137-en.html
URL: http://mme.modares.ac.ir/article-15-69137-en.html
SHAHRBANOU SAYADI * 
1, ALIREZA BAGHBANAN2 , MORTEZA JAVADI3 , JORDI DELGADO-MARTIN4 , HAMID HASHEMALHOSSEINI5
1, ALIREZA BAGHBANAN2 , MORTEZA JAVADI3 , JORDI DELGADO-MARTIN4 , HAMID HASHEMALHOSSEINI5
1- Department of mining engineering, Isfahan University of Technology , s.sayadi@mi.iut.ac.ir
2- Department of mining engineering, Isfahan university of technology
3- Faculty of Mining, Petroleum & Geophysics Engineering, Shahrood University of Technology
4- School of civil engineering, Universidade da Coruña
5- Department of civil engineering, Isfahan University of Technology
2- Department of mining engineering, Isfahan university of technology
3- Faculty of Mining, Petroleum & Geophysics Engineering, Shahrood University of Technology
4- School of civil engineering, Universidade da Coruña
5- Department of civil engineering, Isfahan University of Technology
Abstract: (1245 Views)
Mode I fracture toughness (KIC) is one of the most important parameters in fracture mechanics, which represents the ability of a material containing a pre-existing defect to resist tensile failure. In this paper, the crack length effect on the mode I fracture toughness of an isotropic homogeneous material was investigated. For this purpose, several disc shaped PPMA samples were loaded in pure tension by performing pseudo-compact tension (pCT) tests. Digital image correlation (DIC) method was utilized to assess and monitor the distribution of the deformation field during the tests. DIC results were also used to compare the effect of crack length on the deformation field variation in samples. Very good agreement was found between the KIC values estimated in this study and those reported in the past for the similar material; indicating that the pCT method is convenient for the assessment of KIC. The experimental results also show that the initial crack length has a tangible impact on KIC, although the magnitude of its influence is closely related to material structure and type. According to the tests results, an increase in the initial crack length leads to increase the ultimate displacement at failure point, decrease the maximum load and the amount of absorbed energy until the moment of failure, and finally decrease the mode I fracture toughness of the material. Results of this study show that the pCT method configuration is useful for testing PMMA and may be useful for testing other materials suitable amenable of molding such as mortar, concrete and ceramics. According to the comparison of the results, in the optimum range of sample diameter, about 50 mm, the initial crack length is suggested between 11.5 to 15.5 mm for the PMMA.
Keywords: Mode I Fracture Toughness, Pseudo-Compact Tension Method, Digital Image Correlation Method, Initial Crack Length, PMMA.
Article Type: Original Research |
Subject:
Damage Mechanics
Received: 2023/05/14 | Accepted: 2023/09/27 | Published: 2023/09/1
Received: 2023/05/14 | Accepted: 2023/09/27 | Published: 2023/09/1
Send email to the article author
| Rights and permissions | |
 |
This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License. |