Skip to Main Content
 

Global Search Box

 
 
 
 

ETD Abstract Container

Abstract Header

A STRAIN RATE DEPENDENT 3D MICROMECHANICAL MODEL FOR FINITE ELEMENT SIMULATIONS OF PLAIN WEAVE COMPOSITE STRUCTURES

AMINJIKARAI, SRINIVASA BABU

Abstract Details

2003, MS, University of Cincinnati, Engineering : Aerospace Engineering.
A 3D micromechanical model has been developed for Plain Weave Composites (PWC) and implemented in the explicit finite element software DYNA3D. The model accounts for the strain rate dependency, inherent material nonlinearity, and progressive failure of constituents of PWC. The micromechanical equations have been obtained for a Representative Volume Cell (RVC) which is assumed to represent the behavior of a PWC lamina. The model implemented in DYNA3D can be used for the simulation of the mechanical behavior of PWC structures under various loads such as multi-axial and impact. The yarns were assumed to be transversely isotropic till initial failure. A viscoplastic constitutive model was used for the resin constituent as it was the primary reason for the rate dependency of PWC. The nonlinear behavior in shear was modeled by updating the shear moduli of the constituents based on their current stress state. Progressive failure was modeled by defining a set of maximum strain criteria for detecting failure in constituents and degrading the properties depending on the failure mode. The implemented model was validated in different loading conditions by comparing its prediction with experimental results available in the literature. Good correlation was observed between the predicted and the experimental results.
Dr. Ala Tabiei (Advisor)
112 p.

Recommended Citations

Citations

  • AMINJIKARAI, S. B. (2003). A STRAIN RATE DEPENDENT 3D MICROMECHANICAL MODEL FOR FINITE ELEMENT SIMULATIONS OF PLAIN WEAVE COMPOSITE STRUCTURES [Master's thesis, University of Cincinnati]. OhioLINK Electronic Theses and Dissertations Center. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1070549522

    APA Style (7th edition)

  • AMINJIKARAI, SRINIVASA. A STRAIN RATE DEPENDENT 3D MICROMECHANICAL MODEL FOR FINITE ELEMENT SIMULATIONS OF PLAIN WEAVE COMPOSITE STRUCTURES. 2003. University of Cincinnati, Master's thesis. OhioLINK Electronic Theses and Dissertations Center, http://rave.ohiolink.edu/etdc/view?acc_num=ucin1070549522.

    MLA Style (8th edition)

  • AMINJIKARAI, SRINIVASA. "A STRAIN RATE DEPENDENT 3D MICROMECHANICAL MODEL FOR FINITE ELEMENT SIMULATIONS OF PLAIN WEAVE COMPOSITE STRUCTURES." Master's thesis, University of Cincinnati, 2003. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1070549522

    Chicago Manual of Style (17th edition)