Effect of laser shock peening on fatigue stress concentration of polyester reinforced by Al-Micro powder composites

Joint Authors

Mutashshar, Ammar A.
al-Khazraji, Ahmad Nayif Ibrahim

Source

Engineering and Technology Journal

Issue

Vol. 38, Issue 3A (31 Mar. 2020), pp.325-334, 10 p.

Publisher

University of Technology

Publication Date

2020-03-31

Country of Publication

Iraq

No. of Pages

10

Main Subjects

Engineering Sciences and Information Technology

Abstract EN

Laser shock peening is a widely common process for materials treatment and typically used for fatigue strength enhancement especially for metals.

In this paper, its effect on polymeric composite materials studied experimentally.

Unsaturated polyester was used as a matrix in order to composites preparation and Aluminum powder as fillers.

A Hand lay-up technique has been used for composites making.

Composites with three volume fractions of Aluminum powder were prepared (2.5%, 5%, and 7.5%).

Fatigue specimens as a standard and with (1mm) semi-circular notch are prepared for testing.

The fatigue test was performed at room temperature and stress ratio (R=-1).

Laser shock peening with two levels of energy have been applied (1Joule, and 2Joule).

The results showed an increase in the endurance strength of the notch for 7.5% volume fraction especially at 1J laser energy by about 26.7056% compared with the un-treatment notched state, which in turn reduced the fatigue stress concentration by about 21.0508% compared with standard fatigue stress concentration.

On the other hand, the presence of notch effect on endurance strength was increased after laser treatment of composites with 2.5% volume fraction and the reduced was by about 39.698% at 2J laser energy.

American Psychological Association (APA)

al-Khazraji, Ahmad Nayif Ibrahim& Mutashshar, Ammar A.. 2020. Effect of laser shock peening on fatigue stress concentration of polyester reinforced by Al-Micro powder composites. Engineering and Technology Journal،Vol. 38, no. 3A, pp.325-334.
https://search.emarefa.net/detail/BIM-948637

Modern Language Association (MLA)

al-Khazraji, Ahmad Nayif Ibrahim& Mutashshar, Ammar A.. Effect of laser shock peening on fatigue stress concentration of polyester reinforced by Al-Micro powder composites. Engineering and Technology Journal Vol. 38, no. 3A (2020), pp.325-334.
https://search.emarefa.net/detail/BIM-948637

American Medical Association (AMA)

al-Khazraji, Ahmad Nayif Ibrahim& Mutashshar, Ammar A.. Effect of laser shock peening on fatigue stress concentration of polyester reinforced by Al-Micro powder composites. Engineering and Technology Journal. 2020. Vol. 38, no. 3A, pp.325-334.
https://search.emarefa.net/detail/BIM-948637

Data Type

Journal Articles

Language

English

Notes

Includes bibliographical references : p. 333-334

Record ID

BIM-948637