TY - JOUR
T1 - Interfacial debonding in laminated titanium matrix composites
AU - Lissenden, Cliff J.
AU - Herakovich, Carl T.
N1 - Funding Information:
Titanium matrix composites (TMC) currently hold much promise for improving the performance of structural components subjected to severe thermomechan-ical loading. Advantages of TMC over the monolithic materials currently in use include improved strength * This work was supporled by NASA langley Research Center (NASA Grant NAG-I-745), the National Science Foundation (NSF Grant MSS-91153218), the Air Force Office of Scientific Research (AFOSR Grant F469620-93-1-0359) and the Center for Light Thermal Structures at the University of Virginia. Composite tubes were provided by McDonnell Douglas Corporation, 1 Corresponding author. Current address: Department of Engineering Science and Mechanics, Penn State University, University Park, PA 16802, FAX: 814-863-6031, e-mail: [email protected]
PY - 1996/4
Y1 - 1996/4
N2 - The results of an experimental program in which multiaxial loads were applied to [04] and [±45]s silicon carbide/titanium (SiC/Ti) tubes are reviewed showing that stress coupling, matrix viscoplasticity (including room temperature creep) and fiber/matrix interfacial damage all contribute to nonlinear response and permanent strains in titanium matrix composites (TMC). A micromechanical model that explicitly considers the aforementioned phenomena is presented herein. The model assumes a periodic microstructure and uses finite elements to analyze a representative volume element. The composite is assumed to be in a state of generalized plane strain making it possible to discretize only a generic transverse plane while still being able to apply three-dimensional loading through appropriate boundary conditions. The response of laminated composites is predicted by incorporating the micromechanical results into nonlinear lamination theory. Predictions are presented to show the influence of the model parameters on the effective composite response of unidirectional [04] and angle-ply [±45]s TMC laminates.
AB - The results of an experimental program in which multiaxial loads were applied to [04] and [±45]s silicon carbide/titanium (SiC/Ti) tubes are reviewed showing that stress coupling, matrix viscoplasticity (including room temperature creep) and fiber/matrix interfacial damage all contribute to nonlinear response and permanent strains in titanium matrix composites (TMC). A micromechanical model that explicitly considers the aforementioned phenomena is presented herein. The model assumes a periodic microstructure and uses finite elements to analyze a representative volume element. The composite is assumed to be in a state of generalized plane strain making it possible to discretize only a generic transverse plane while still being able to apply three-dimensional loading through appropriate boundary conditions. The response of laminated composites is predicted by incorporating the micromechanical results into nonlinear lamination theory. Predictions are presented to show the influence of the model parameters on the effective composite response of unidirectional [04] and angle-ply [±45]s TMC laminates.
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U2 - 10.1016/0167-6636(95)00031-3
DO - 10.1016/0167-6636(95)00031-3
M3 - Article
AN - SCOPUS:0030126378
SN - 0167-6636
VL - 22
SP - 279
EP - 290
JO - Mechanics of Materials
JF - Mechanics of Materials
IS - 4
ER -