Engineering Failure Analysis, ( ISI ), Volume (130), No (105780), Year (2021-12) , Pages (105780-105780)

Title : ( An evaluation of the loading condition on mixed-mode stress intensity factors for CTST specimens made of 2024-T351 aluminum alloy )

Authors: Afshin Khatammanesh , Khalil Farhangdoost , Danial Ghahremani Moghadam , Reza Masoudi Nejad ,

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Abstract

In this paper, the fracture behavior of 2024-T351 aluminum alloy as a key engineering material in the aeronautical industry is investigated under various planar and nonplanar mixed-mode loading conditions involving pure mode-I and pure mode-III loadings. A newly suggested loading setup accompanied by compact tension shearing and tearing (CTST) specimens is utilized to perform fracture tests. Three-dimensional finite element modeling using the interaction integral method is carried out to derive the stress intensity factors (SIFs) and their ratios through the crack front for several mixed-mode configurations. The numerical results reveal that the coupled effect of modes II and III under mixed-mode I/II, I/III and I/II/III loading conditions is remarkable. Moreover, the amounts of SIFs at the center of the specimens are employed to predict the critical fracture loads according to different mixed-mode criteria. Also, scanning electron microscope (SEM) images of the fracture surfaces of CTST specimens are examined to evaluate the effect of different loading angles from a morphological viewpoint. A good consistency can be found among the results of the theoretical solutions of the criteria and the experimental observations for different loading conditions.

Keywords

, Mixed, mode fracture Finite element method Stress intensity factor Crack Fractography
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@article{paperid:1087849,
author = {Khatammanesh, Afshin and Farhangdoost, Khalil and Danial Ghahremani Moghadam and Reza Masoudi Nejad},
title = {An evaluation of the loading condition on mixed-mode stress intensity factors for CTST specimens made of 2024-T351 aluminum alloy},
journal = {Engineering Failure Analysis},
year = {2021},
volume = {130},
number = {105780},
month = {December},
issn = {1350-6307},
pages = {105780--105780},
numpages = {0},
keywords = {Mixed-mode fracture Finite element method Stress intensity factor Crack Fractography},
}

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%0 Journal Article
%T An evaluation of the loading condition on mixed-mode stress intensity factors for CTST specimens made of 2024-T351 aluminum alloy
%A Khatammanesh, Afshin
%A Farhangdoost, Khalil
%A Danial Ghahremani Moghadam
%A Reza Masoudi Nejad
%J Engineering Failure Analysis
%@ 1350-6307
%D 2021

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