In-Situ High Fidelity Inspection of Planar Biaxial Cruciform Testing for Validating Discrete Progressive Damage Growth Modeling of Polymer Matrix Composites
Abstract
Certification of composite structures is costly and time-consuming due to the burden of extensive building-block testing required to" substantiate the structural design. Although, most of the coupon-level tests are required to establish design allowables and accept""ance limits for receiving inspections, significant amount of mid-level tests can be eliminated with validated high-fidelity analysis"" techniques that are scalable to component level. However, validated progressivedamage analysis techniques that can accurately pred"ict the fatigue life and residual strength at element and component level are still in their infancy. Most analysis techniques are v"alidated for uniaxial loading, but their applicability for multi-axial loading that are representative of realistic structural loads"" are not acceptable. With the increase in composite usage in rotorcrafts and engines, there is a great need for understanding damage" growth behavior of composite under complex multi-axial loading. Damage growth mechanisms under such complex loading configurations are significantly complex and require high-fidelity inspection techniques such as X-ray computed tomography (CT) supplemented by th"ermography and digital image correlation to accurately quantify the damage growth under such conditions. Typically, cyclic loads are"" applied to a composite test article and periodically taken out of test frame to conduct inspections.However, progressive damage gr""owth under such complex loading configuration may not be accurately represented or noticeable at unloaded stages. Therefore, there i"s a great need to develop a compact test rig that can be placed inside of X-ray CT for accurately characterizing damage growth under complex biaxial loading configurations. The goal of this research is toinvestigate damage growth characteristics of composites under planar biaxial loading in order to validate analysis predictions. Damage growth during quasi-static loading will be monitored usi"ng acoustic emission, thermography and digital image correlation, and X-ray.
Document Details
- Document Type
- DoD Grant Award
- Publication Date
- Mar 26, 2018
- Source ID
- N000141812151
Entities
People
- Waruna Seneviratne
Organizations
- Office of Naval Research
- United States Navy
- Wichita State University