Experimental investigation of fatigue crack initiation from notch for 2024 T351 Al-alloy

Mustapha Benachour; Nadjia Benachour; Mohamed Benguediab

doi:10.3221/IGF-ESIS.51.04

Experimental investigation of fatigue crack initiation from notch for 2024 T351 Al-alloy

Authors

Mustapha Benachour University of Tlemcen, Ingeniery of Mechanical Systems and Materials Laboratory, Tlemcen, Algeria http://orcid.org/0000-0002-8415-241X
Nadjia Benachour University of Tlemcen, Ingeniery of Mechanical Systems and Materials Laboratory, Tlemcen, Algeria
Mohamed Benguediab University of Sidi Bel Abbes, LMPM Laboratory, Sidi Bel Abbes (Algeria), Mechanical Engineering Department

DOI:

https://doi.org/10.3221/IGF-ESIS.51.04

Keywords:

Fatigue crack initiation, Notch, Finite element method, Stress field, Aluminium alloy

Abstract

In this investigation, fatigue criterion was established to predict crack-initiation at the tip of a notch in aged hardening aluminum alloy. This criterion was used to predict the residual lifetime in aeronautical structures using concept of local stress at notch and subjected to constant amplitude loading characterized by mean stress. Charpy V-notch specimens were taken from sheet plate and the notch radius accurately machined at value of 0.2mm. The local stresses were determined numerical and validated analytically. In experimental investigation, the V-notched specimens were loaded in four point bending fatigue with a load ratio R=0.1 and variation in amplitude loading.

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Author Biographies

Mustapha Benachour, University of Tlemcen, Ingeniery of Mechanical Systems and Materials Laboratory, Tlemcen, Algeria

Professor and Researcher in Materials Sciences and Mechanical Engineering.

Mechanical Engineering Department
Nadjia Benachour, University of Tlemcen, Ingeniery of Mechanical Systems and Materials Laboratory, Tlemcen, Algeria

Doctor in materials Sciences and Physic's
Mohamed Benguediab, University of Sidi Bel Abbes, LMPM Laboratory, Sidi Bel Abbes (Algeria), Mechanical Engineering Department

Professor in materials Sciences, especially in fatigue and fracture mechanics of ferrous and non-ferrous materials and alloys.

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Published

25-10-2019

Issue

Vol. 14 No. 51 (2020): January 2020

Section

SI: Structural Integrity and Safety: Experimental and Numerical Perspectives

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How to Cite

Experimental investigation of fatigue crack initiation from notch for 2024 T351 Al-alloy. (2019). Frattura Ed Integrità Strutturale, 14(51), 45-51. https://doi.org/10.3221/IGF-ESIS.51.04