An Embedded Crack in a Laminate with Adhesive Layers.
Abstract
The five-layered composite as treated in this work consists of three plates bonded together with adhesives. The thickness of the adhesives, though small, is included in the analysis resulting in the five layer geometry. A dominant flaw is assumed to prevail at the center of the middle layer when the composite is being stretched uniformly and to overshadow the other types of mechanical damages such as matrix/fiber debonding, fiber breaking, etc. In order to gain a knowledge of the failure mode of the layered composite, the load transmission characteristics which depend upon the geometrical and material constants must be known through a stress analysis. This is accomplished by appealing to an approximate theory of laminates developed from variational principles. The character of the solution is three-dimensional and is sufficiently accurate for predicting physically realizable failure modes. The stress distribution obtained may be further applied in conjunction with a failure criterion to determine whether delamination will occur prior to unstable crack propagation or not. The pertinent parameter, stress intensity factor, is obtained for a variety of material and geometrical constants. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 01, 1977
- Accession Number
- ADA069063
Entities
People
- E. P. Chen
- George C. Sih
Organizations
- Lehigh University