Fracturing Characteristics of Adhesive Joints.
Abstract
In the first section, the dependence of crack velocity on crack extension force, G, over a range of G values from approximately 0.5 to 5.0 lb/in. is discussed. In the second section the 300F curing epoxy, MRL-3, is shown to be independent of cyclic frequency over the range from 0.67 to 180 cpm in both laboratory air and liquid water. At room temperature the adhesive is shown to be more resistant to fatigue crack extension in water than in ambient humidity. At elevated temperatures the crack growth rate is much faster than it is at room temperature and the adhesive becomes frequency dependent. Section 3 compares the fracture toughness of a number of adhesives with the fatigue threshold value and the stress corrosion cracking threshold G as a function of testing temperature.
Document Details
- Document Type
- Technical Report
- Publication Date
- Sep 01, 1975
- Accession Number
- ADA016288
Entities
People
- E. J. Ripling
- Sheldon Mostovoy
Organizations
- Materials Research Laboratory