Accession Number : ADA118382

Title :   A Photoelastic Study of Load Distributions and Stresses in Multi-Groove Connections of the Same Material under Tension.

Descriptive Note : Technical rept.,

Corporate Author : ARMY ARMAMENT RESEARCH AND DEVELOPMENT COMMAND WATERVLIET NY LARGE CALIBER WEAPON SYSTEMS LAB

Personal Author(s) : Cheng,Y F

PDF Url : ADA118382

Report Date : May 1982

Pagination or Media Count : 23

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.

Descriptors :   *Stress concentration, *Photoelasticity, *Tensile stress, *Load distribution, Grooving, Profiles, Three dimensional, Equations, Screws, Lugs, Connectors, Penetration, Cores

Subject Categories : Couplers, Fasteners, and Joints
      Mechanics

Distribution Statement : APPROVED FOR PUBLIC RELEASE