The Analysis and Design of Composite Material Bonded Joints under Static and Fatigue Loadings
DELAWARE UNIV NEWARK DEPT OF MECHANICAL AND AEROSPACE ENGINEERING
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Extensive research was conducted providing analysis methods and design methodology for bonded joints in structures of laminated composite materials under static and fatigue loads. An analytical closed form solution has been developed for stresses and deformations in the adhesive joint and the adherends, including transverse shear deformations and normal strain, adherend anisotropy, and adhesive properties. A DIGITAL PROGRAM PROVIDES RAPID DESIGN AND ANALYSIS AN INCLUSIVE PARA-METER STUDY PROVIDES TRENDS AND METHODOLOGY. Static tests have been developed providing shear and extensional stiffnesses and ultimate stresses of the adhesive in the joint configurations. Fatigue tests were conducted for various geometries, loadings, and adherend materials. Excellent correlation is shown between the ultrasonic and destructive test modulus measurements. Two new test methods are advanced to measure the shear and tensile properties of the adhesive as they exist within the joint. Ultimate and fatigue test results of 1002-S fiberglass adherends bonded with Hysol EA 951 film are given.
- Couplers, Fasteners and Joints