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Thick Composite Crack Analysis
Navy SBIR FY2013.2
| Sol No.: |
Navy SBIR FY2013.2 |
| Topic No.: |
N132-101 |
| Topic Title: |
Thick Composite Crack Analysis |
| Proposal No.: |
N132-101-0358 |
| Firm: |
Technical Data Analysis, Inc.
3190 Fairview Park Drive
Suite 650
Falls Church, Virginia 22042 |
| Contact: |
Nicole Apetre |
| Phone: |
(703) 226-4076 |
| Web Site: |
www.tda-i.com |
| Abstract: |
Composite materials have emerged as the materials of choice for increasing the performance and reducing the weight and cost of military aircraft. Nevertheless, reliable prediction of composites behavior in both static and cyclic load situations are far from complete, due to limitations of current analysis methods and to uncertainty and statistical variation of composite behavior under a given set of environment and loading exposure.
In this SBIR effort, we therefore focus on applying the knowledge gained from classical damage mechanics in a Peridynamics framework - specifically concentrating on manufacturing defects and their impact on the composites performance under a variety of loading conditions. The required analytical expressions are developed in the framework of continuum damage mechanics by suitable micromechanical computations. Lessons learned in this field will be used to model manufacturing defects in Peridynamics. The methodology will be applied to a variety of laminate layups and the predictions will be compared with experiments and independent FE simulations wherever applicable. |
| Benefits: |
The multi-scale synergistic damage mechanics software will lead to a well validated, state-of-the-art, accurate and computationally efficient crack growth analysis tool which is anticipated to be used widely in aerospace industry and academia. It will replace many of the current cumbersome techniques employed to analyze the composite materials fracture problems and to estimate fatigue life.
The field of Peridynamics is an exciting and new field with a great potential to study discontinuities in structures such as cracks or cavities and the present study will explore many of the possibilities in this new research area to answer some of the most fundamental questions in fatigue research such as crack initiation, crack growth, short crack problem, retardation and acceleration effects in variable amplitude loading, damage evolution, etc. |
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