Evaluation of elastic-plastic fracture in aluminum panels

✍ Scribed by Jennifer Cordes; Rahmi Yazici

• Publisher: Elsevier Science
• Year: 1994
• Tongue: English
• Weight: 678 KB
• Volume: 47
• Category: Article
• ISSN: 0013-7944
• DOI: 10.1016/0013-7944(94)90100-7

✦ Synopsis

An experimental and numerical study of failure in 6061-T6 aluminum panels was completed. The experimental effort included generation of G, curves and collection of data from static fracture tests on thin aluminum panels with cracks and notches. The numerical effort centered on predicting the crack opening displacement as a function of applied load, predicting applied load at failure, and predicting the nature of failure: either yield or fracture.. A finite element model, referred to in this paper as the damage zone mode1 (DZM), incorporates a cohesive stress zone adjacent to a crack or notch. The predicted failure loads using the DZM were within 9.0% of experimental values for yield failure. predicted failure loads were within 11 .O% of experimental failure loads when stable crack growth preceded unstable fracture. In all cases, the DZM predicted the nature of the final failure.