Bending of a Bonded Beam as a Test Method for Adhesive Properties
Rept. for Sep 1986-Jun 1987
VIRGINIA TECH CENTER FOR ADHESION SCIENCE BLACKSBURG
Pagination or Media Count:
A strength-of-materials type solution is obtained for the shear stress state in the adhesive layer of a bonded cantilever beam subjected to an end load. The shear stress is constant through the thickness of the adhesive layer and varies from zero at the fixed end to a maximum value at the free end. This maximum value can, under certain conditions, be calculated from knowledge of the load and the beam geometry under certain conditions, be calculated from knowledge of the load and the beam geometry only. The adhesives shear modulus can then be determined from a measurement of the shear strain in the adhesive layer. An expression for the beam deflection is also obtained. It contains a coefficient of adhesion which is potentially useful in evaluating surface treatments or other factors leading to different states of adhesion. Fracture mechanics application of the specimen, and nonlinear and viscoelastic adhesive behavior are briefly mentioned.
- Adhesives, Seals and Binders
- Laminates and Composite Materials
- Structural Engineering and Building Technology