Loading...

Failure Analysis in Conical Structures Made by Tape Winding Method under Cold and Hot Thermal Load

Karimian, Mehdi | 2019

624 Viewed
  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 52122 (45)
  4. University: Sharif University of Technology
  5. Department: Aerospace Engineering
  6. Advisor(s): Hosseini Kordkheili, Ali; Parviz, Hadi
  7. Abstract:
  8. The aim of this study is numerical simulation of progerasive failure in conical structures that manufactured by tape-winding proceses in various temperatures. For this purpose, flat laminates by tape-winding proceses firstly manufactured using carbon/phenolic prepreg tape. Then tensile, compression, shear and thermal expansion coefficient specimens are cut from these laminates. Tensile and compression test are done on these specemens in fiber and matrix directions in temperature range 23-200℃ and stress-strain and stress-time curves are achavied. Using these curves tensile elastic modulus in fiber and matrix directions and Poisson's ratio are obtained in room temperature. Also tensile and compression strength in fiber and matrix directions are obtained for different temperatures. In addition shear test done by using v-notch specimens and shear elastic modulus in room temperature and shear strength in various temperatures obtained. In this study addition of mechanical test, termomecanical test also done for determining thermal expantion cofficent in matrix and fiber directions. After determining mechanical and thermomechanical properties, progressive failure in conical structure under internal pressure and temperature changing simulated in abaqus software. For this purpose an own develoved UMAT code is used. For predict of failure max-stress, Tsai-Hill, Yamada-Sun and Hashin criterias used. Also for failure progressive Reddy-Reddy model for degradation of materials properties are used. Finally pressure for initial and final failure in different temperatures are obtained and compared with together. From the results it has been generally noted that failure pressure decreases by increasing temperature
  9. Keywords:
  10. Experimental Test ; Carbon/Phenolic ; Mechanical Properties ; Progressive Failure Analysis ; Tap Winding ; Composite

 Digital Object List

 Bookmark

No TOC