Development of Failure Criteria for Polymer Based Composites under Multi-axial Loading
Abstract
Specifically, we have purchased an axial torsional MTS loading frame and accessories to complement an already existing in-house built planar multi-axial load frame. The research that the instrumentation will facilitate has three phases. In phase I, test coupons(polymer based fibrous laminated composites) that have a cruciform shape and containing a centrally located circular cutout are placed under remotely applied planar, biaxial tension(compression) proportional load states. Biaxial failure envelopes are generated as well as an identification of specific failure mechanisms and measurements such as critical strains to failure. In phase two, the specimens are loaded statically as well as under different loading rates to levels that are fraction of the failure loads and unloaded at different loading rates, thereby characterizing the strain rate dependency and assessing a measure of damage accumulation. In phase three, the polymer(matrix material), by itself is characterized using specimens that are cylindrical under combined tension/compression and axial loading. These tests are to be performed under different temperatures and for a given temperature under different loading rates. The experiments will enable the development of analytical models with a micromechanics basis and importantly, the identification of the operative failure mechanism under different mechanical loads and in the presence of different environmental conditions.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jan 20, 1997
- Accession Number
- ADA332883
Entities
People
- Anthony Waas
Organizations
- University of Michigan