A Multi-Scale Method for Modeling and Analysis of the Creep Behavior in Composite plates

Barzegar, Mohsen | 2017

375 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 50435 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Hosseini Kordkheili, Ali
  7. Abstract:
  8. Polymer matrix composites, which are composed of a wide variety of short or long fibers bound together by organic polymer matrix, have been widely utilized in many engineering aeras, particularly in aerospace engineering. Recently, studying and analyzing the mechanical behavior of composites was one of the major reaserch interests. Regarding the vast variety of data drived from experimental tests, a requirement of tools that could facilitate estimating creep properties of materials is an important concern for researchers. The present work at first, introduces some major creep models and then proposes a 3D creep Burgers model for implementing in abaqus which could be used in macro phase. This implementation is succeeded through writing UMAT codes. In micro phase, by studying the influences of the representative volume elements types on the results, the most appropriate configuration will be selected. Imposing different boundary condition such as Periodic Boundary Condition and using effective stress and strain method leads us to calculate the components of the compliance matrix of material behavior. At the end, the effect of the volume fraction on the results will be discussed and by using curve fitting a new UMAT code affected by volume fraction will be derived
  9. Keywords:
  10. Creep ; Multiscale Modeling ; Composite ; Volume Fraction ; Micromechanics ; User Defined Materials (UMAT)

 Digital Object List