A Photoelastic Study of Load Distributions and Stresses in Multi-Groove Connections of the Same Material under Tension.
Abstract
This report is a continuation of Technical Report ARLCB-TR-81008 and describes a three-dimensional photoelastic study on load distributions and stresses in multi-groove connections of the same material under tension. Two groove profiles were investigated, namely, the British Standard Buttress (BSB), and the new profile. It was found that in both profiles the maximum fillet stress (of)max does not occur at the groove root. Therefore, the narrowest transverse section is not the critical section. The critical stress, i.e., (of)max, in the new profile is higher than that in the BSB profile. Moreover, (of)max in the first groove is higher than in that subsequent grooves. Hence, the first groove is the critical region. In an ideal muli-groove (> 7) connection, the first two lugs could take approximately 50 and 60 percent of the load in the BSB and new profile, respectively. However, the ideal contact could not be expected due to machining tolerances. The worst possible case would occur when only one groove is in contact and the situation is reduced to a single-groove connection. Further work on the effect of different materials is in progress.
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1982
- Accession Number
- ADA118382
Entities
People
- Yi Cheng
Organizations
- United States Army Armament Research, Development and Engineering Center