NDLI: Micromechanical models for textile composites

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Micromechanical models for textile composites

Content Provider	NASA Technical Reports Server (NTRS)
Author	Sankar, Bhavani V. Marrey, Ramesh V.
Copyright Year	1995
Description	Numerical and analytical micromechanical models are presented to predict the thermoelastic behavior of a textile composite. In the numerical model, the unit-cell is discretized with finite elements, and periodic boundary conditions are imposed between opposite faces of the unit-cell. For a thin textile composite, stress gradients effects through the thickness are demonstrated. The consequent difference in the stiffness and strength behavior of thick and thin composites are discussed. The numerical model is implemented to predict 3-D thermo-elastic constants for a thick textile composite, and the plate thermo-mechanical properties for a thin textile composite. The numerical model is extended to compute the thermal residual microstresses due to processing to predict the composite failure envelopes. An analytical model - Selective Averaging Method (SAM) - is proposed, which is based on a judicious combination of stiffness and compliance averaging to estimate the 3-D elastic constants. Both the models are tested and verified for several examples by comparing the stiffness properties with elasticity solutions and available results.
File Size	1640232
Page Count	39
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_19960010553
Archival Resource Key	ark:/13960/t6062gs7r
Language	English
Publisher Date	1995-10-01
Access Restriction	Open
Subject Keyword	Composite Materials Failure Modes Average Boundary Conditions Three Dimensional Composites Textiles Finite Element Method Micromechanics Thickness Plates Structural Members Stress Distribution Mathematical Models Stiffness Elastic Properties Discrete Functions Prediction Analysis Techniques Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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