Experimental Results of Cruciform Specimens Under Biaxial Elastic-Plastic Loading.
Abstract
Biaxial experiments have been conducted using cruciform specimens to generate elastic-plastic material deformation data. Such data is required to validate a multiaxial constitutive model which has been implemented in finite element analysis codes at AMRL. The elastic-plastic data have been obtained for two aircraft metallic materials namely: 7050 aluminium alloy and D6AC high strength steel. In this work some of the deficiencies in the existing biaxial test system at AMRL have been rectified, including the provision for strain control testing. It has been shown that for this type of work, a new specimen design is needed to allow a wider range of biaxial stress conditions to be investigated, and a suitable design is given herein. Furthermore, as an alternative to incremental plasticity models, a simple closed-form, integral solution has been developed and is presented for proportional, cyclic loading. Using this integral solution, good agreement between experimental results and the theoretical predictions has been obtained.
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1996
- Accession Number
- ADA319317
Entities
People
- C. H. Wang
- M. Heller
Organizations
- Defence Science and Technology Group