NASA LogoNTRSNTRS - NASA Technical Reports ServerSearchmore_vertCollectionsAboutNewsHelpLogin Back to ResultsStochastic-Strength-Based Damage Simulation Tool for Ceramic Matrix and Polymer Matrix Composite StructuresStochastic-based, discrete-event progressive damage simulations of ceramic-matrix composite and polymer matrix composite material structures have been enabled through the development of a unique multiscale modeling tool. This effort involves coupling three independently developed software programs: (1) the Micromechanics Analysis Code with Generalized Method of Cells (MAC/GMC), (2) the Ceramics Analysis and Reliability Evaluation of Structures Life Prediction Program (CARES/ Life), and (3) the Abaqus finite element analysis (FEA) program. MAC/GMC contributes multiscale modeling capabilities and micromechanics relations to determine stresses and deformations at the microscale of the composite material repeating unit cell (RUC). CARES/Life contributes statistical multiaxial failure criteria that can be applied to the individual brittle-material constituents of the RUC. Abaqus is used at the global scale to model the overall composite structure. An Abaqus user-defined material (UMAT) interface, referred to here as "FEAMAC/CARES," was developed that enables MAC/GMC and CARES/Life to operate seamlessly with the Abaqus FEA code. For each FEAMAC/CARES simulation trial, the stochastic nature of brittle material strength results in random, discrete damage events, which incrementally progress and lead to ultimate structural failure. This report describes the FEAMAC/CARES methodology and discusses examples that illustrate the performance of the tool. A comprehensive example problem, simulating the progressive damage of laminated ceramic matrix composites under various off-axis loading conditions and including a double notched tensile specimen geometry, is described in a separate report.Document ID20160012463Acquisition SourceGlenn Research CenterDocument TypeTechnical Memorandum (TM)AuthorsNemeth, Noel N.*(NASA Glenn Research Center Cleveland, OH United States)*Bednarcyk, Brett A.*(NASA Glenn Research Center Cleveland, OH United States)*Pineda, Evan J.*(NASA Glenn Research Center Cleveland, OH, United States)*Walton, Owen J.*(Wisconsin-Madison Univ. Madison, WI, United States)*Arnold, Steven M.*(NASA Glenn Research Center Cleveland, OH, United States)*Date AcquiredOctober 19, 2016Publication DateOctober 1, 2016Subject CategoryComposite MaterialsStructural MechanicsReport/Patent NumberGRC-E-DAA-TN32168E-19236NASA/TM-2016-219113Funding Number(s)WBS: WBS 109492.02.03.01.30.01Distribution LimitsPublicCopyrightWork of the US Gov. Public Use Permitted.Keywordscomposite structuresceramicsAvailable DownloadsNameType20160012463.pdfSTIcloud_downloadcontent_copyvisibilityRelated RecordsThere are no records associated with this record.visibility_offNo Preview Available
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