FRACTURE MECHANICS FOR AN INTERFACIAL CRACK BETWEEN ADHESIVELY BONDED DISSIMILAR MATERIALS

A plate composed of two dissimilar materials, bonded together along a straight line with a center crack was studied. This problem represents an idealization of an adhesive joint or a composite structure with an interfacial flaw or crack caused by faulty joining techniques. Common examples are imperfections, voids, or broken bonds on the composite interface. Combined with the finite element technique, the strain energy method and the J-intergral method have been extended to a bi-material problem to calculate the value of the strain energy rate. The numerical analysis concentrated on three categories of composite materials with moduli ratio, E sub 2/E sub 1 = 1,20, and 120. These results provide a complete crack-tip stress analysis. Lastly, the compliance method was employed for experimental verification of the numerical results. (Author)

• Corporate Authors:

  University of Illinois, Urbana-Champaign

  Department of Theoretical and Applied Mechanics
  Urbana, IL  United States  61801
• Authors:
  • Wang, C Y
• Publication Date: 1972-3

Media Info

• Pagination: 101 p.

Subject/Index Terms

• TRT Terms: Composite materials; Cracking; Finite element method; Fracture mechanics; Stresses
• Old TRIS Terms: Crack stresses
• Subject Areas: Marine Transportation; Materials;

Filing Info

• Accession Number: 00034700
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: T/AM-353
• Contract Numbers: N00019-72-C-0274, N00019-71-C-0323
• Files: TRIS
• Created Date: Sep 29 1972 12:00AM