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dc.contributor.authorJackson, Wade C.
dc.contributor.authorBergan, Andrew C.
dc.contributor.authorRose, Cheryl A.
dc.contributor.authorSegal, Kenneth N.
dc.contributor.authorGardner, Nathaniel W.
dc.contributor.authorWaas, Nalinda W.
dc.identifier.citationWade C. Jackson, Andrew Bergan, Cheryl A. Rose, Kenneth N. Segal, Nathaniel W. Gardner and Nalinda W. Waas. "Experimental Observations of Damage States in Unnotched and Notched 3D Orthogonal Woven Coupons Loaded in Tension," AIAA 2022-1007. AIAA SCITECH 2022 Forum. January 2022.en_US
dc.descriptionPresented at the conference AIAA SCITECH 2022 Forum held in January 3-7, 2022, San Diego, CA & Virtual Click on the DOI link to view this conference paper and video presentation (may not be free).en_US
dc.description.abstractThis paper describes a series of unnotched and notched tensile tests on two 3D orthogonal woven architectures loaded in the warp direction. Dogbone specimens were used for the unnotched tests, and open-hole specimens were used for the notched tests. For each architecture and test type, two specimens were loaded under monotonic displacement control to failure, and two specimens were incrementally loaded to failure in five steps. X-ray computed tomography (CT) was used to characterize the woven architecture and defects on each specimen prior to testing. Digital image correlation (DIC) images were obtained from both sides of the specimen throughout the loading and unloading. For the incremental tests, X-ray CT was used to document the damage progression after each load increment. The results for both architectures and test specimens followed a similar pattern where matrix cracks formed perpendicular to the load direction and were primarily located between the stacks of warp tows. Two-piece failure path always occurred perpendicular to the loading direction, along the through-thickness segments of the Z-tows. The combination of stress concentrations due to the specimen geometry, weave geometry, and cut tows created stress concentrations that appear to initiate failure.en_US
dc.publisherAmerican Institute of Aeronautics and Astronauticsen_US
dc.subjectStress concentrationen_US
dc.subjectTensile testsen_US
dc.subjectSurface cracksen_US
dc.subjectStructural responseen_US
dc.subjectAcoustic emissionen_US
dc.subjectCrack propagationen_US
dc.subjectResin transfer moldingen_US
dc.subjectAspect ratioen_US
dc.subjectNumerical simulationen_US
dc.titleExperimental Observations of Damage States in Unnotched and Notched 3D Orthogonal Woven Coupons Loaded in Tensionen_US
dc.typeConference paperen_US
dc.rights.holderThis material is declared a work of the U.S. Government and is not subject to copyright protection in the United States.en_US

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