Theoretical and Experimental Investigation of Mechanically Fastened Composites
Abstract
The mechanics of fasteners in composites were studied in a combined experimental-theoretical research program. The objectives were to gain fundamental insight into the stress-strain field near pin-type fasteners and to provide guidance to designers responsible for the selection and sizing of fasteners. The primary experimental method utilizes Moire interference with optical Fourier processing of grid photoplates. A new technique using optical interference to generate gratings in three directions was developed to gain a factor of 10 in sensitivity. The constitutive properties of the material studied were measured. For the analytical work, a boundary element method (BEM) was developed, a compact and efficient computer code written, and the method compared with the finite-element method. For the problems investigated, the BEM is more efficient. The material used was fiber glass-epoxy laminate with woven fibers. The analytical and experimental forces were brought to bear on the problem of a loaded pin snugly fit in a hole. Results from the two approaches agreed well for the specific composite.
Document Details
- Document Type
- Technical Report
- Publication Date
- Jul 01, 1984
- Accession Number
- ADA150961
Entities
People
- David Sikarskie
- Enayat Mahajerin
- Gary Cloud
- Pedro Herrera
Organizations
- Michigan State University