Document Type : Regular Article

Authors

• Azhar Sabah Ameed ¹
• Farag Mahel Mohammed ²
• Ahlam Luaibi Shuraiji ²

¹ University of Technology/Department of Electromechanical Engineering

² University of Technology/ Electromechanical Department, Baghdad-Iraq, Baghdad-Iraq

Abstract

The study investigated the influence of the dynamic load of a 6061-T6 aluminum plate with two fixed edges with dimensions of 80 mm and two free edges at variable dimensions of 80 mm, and 160 mm. A crack was created in the middle of an aluminum plate using a laser beam of thickness 0.08mm. The crack had different lengths, 3mm, and 5mm, and was created at angles of 0, 45, and 90 degrees. The study focused on determining the initial crack growth caused by the dynamic impact load on the crack area of an aluminum plate caused by the free fall weight at a rate of 20 impacts per minute, the study performed experimental, numerical, and analytical investigations. Based on the experimental results, it was observed that increasing the crack length from 3 mm to 5 mm reduced the initial growth time by 45% in a plate with an aspect ratio of 1:1. However, in a plate with an aspect ratio of 1:2, the percentage of reduction in initial growth time was 16.5%. The results showed that increasing the crack angle from 0 to 90 degrees prolonged the crack growth in all samples with the same test conditions. The study aims to analyze crack growth in aluminum alloy 6061-T6 under dynamic impact loads with different boundary conditions. The research provides insights into material behavior in thin plates of an oil and gas alloy, contributing to developing better products and processes for the industry.

Keywords

• Dynamic load
• Crack growth Crack length
• Impact load