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기술보고서

기술보고서 게시판 내용
타이틀	Modeling Progressive Damage Using Local Displacement Discontinuities Within the FEAMAC Multiscale Modeling Framework
저자	Ranatunga, Vipul;; Bednarcyk, Brett A.;; Arnold, Steven M.
Keyword	BEND TESTS;; CARBON FIBER REINFORCED PLASTICS;; COHESION;; CRACK GEOMETRY;; DAMAGE;; DISCONTINUITY;; DISPLACEMENT;; FINITE ELEMENT METHOD;; FLEXING;; GRID GENERATION (MATHEMATICS); MECHANICAL PROPERTIES;; MULTISCALE MODELS;; POLYMERS;; SIMULATION;; STRUCTURAL FAILURE;; UNLOADING
URL	http://hdl.handle.net/2060/20100040418
보고서번호	NASA/TM-2010-216825
발행년도	2010
출처	NTRS (NASA Technical Report Server)
ABSTRACT	A method for performing progressive damage modeling in composite materials and structures based on continuum level interfacial displacement discontinuities is presented. The proposed method enables the exponential evolution of the interfacial compliance, resulting in unloading of the tractions at the interface after delamination or failure occurs. In this paper, the proposed continuum displacement discontinuity model has been used to simulate failure within both isotropic and orthotropic materials efficiently and to explore the possibility of predicting the crack path, therein. Simulation results obtained from Mode-I and Mode-II fracture compare the proposed approach with the cohesive element approach and Virtual Crack Closure Techniques (VCCT) available within the ABAQUS (ABAQUS, Inc.) finite element software. Furthermore, an eccentrically loaded 3-point bend test has been simulated with the displacement discontinuity model, and the resulting crack path prediction has been compared with a prediction based on the extended finite element model (XFEM) approach.