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Overview of Coupon Testing of an IM7/8552 Composite Required to Characterize High-Energy Impact Dynamic Material ModelsAs part of NASA’s Advanced Composites Project (ACP), a significant research effort was established to develop and mature analysis methods for composite materials particularly applicable to high-energy dynamic impact applications. An overall goal was to develop and advance analysis methods that can be characterized using fundamental coupon level tests. Based on this fundamental characterization, simulations at the higher levels of a building block approach can be purely predictive. The tests described in this report were performed on a unidirectional carbon fiber polymer matrix composite, IM7/8552 tape, as this material system is representative of a modern aerospace grade carbon fiber tape system. These tests were chosen to provide fundamental material characterization data for three representative progressive damage and failure analysis material models available within the LS-DYNA commercial transient dynamic finite element code for use in the simulation of the dynamic and impact response of composite materials. Two of the material models, MAT162 and MAT261, are well established material models within LS-DYNA. The third material model, MAT213, is under active development. Testing consisted primarily of ASTM-type standard tests, and the tests that were performed were consistent with the needs of all three models. Additionally, coupon level tests were performed that can be used to characterize a delamination model (e.g., cohesive zone or tie-break contact). While, the tests described in this report provide fundamental material characterization data for all three of the material models mentioned above, the data is applicable to additional material models not discussed.
Document ID
20200002195
Acquisition Source
Glenn Research Center
Document Type
Technical Memorandum (TM)
Authors
Justusson, Brian P.
(Boeing Research and Technology St. Louis, MO, United States)
Molitor, Matthew T.
(Boeing Research and Technology St. Louis, MO, United States)
Iqbal, Jaff S.
(Boeing Research and Technology St. Louis, MO, United States)
Rassaian, Mostafa
(Boeing Research and Technology St. Louis, MO, United States)
Ricks, Trenton M.
(NASA Glenn Research Center Cleveland, OH, United States)
Goldberg, Robert K.
(NASA Glenn Research Center Cleveland, OH, United States)
Date Acquired
April 3, 2020
Publication Date
March 1, 2020
Subject Category
Structural Mechanics
Report/Patent Number
NASA/TM-2020-220498
E-19803
GRC-E-DAA-TN78332
Funding Number(s)
WBS: 081876.01.03.05
CONTRACT_GRANT: NNL09AA00A
Distribution Limits
Public
Copyright
Public Use Permitted.
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