Accession Number : ADA338658

Title :   Elastic Comparison of Four Thread Forms.

Descriptive Note : Final rept.,

Corporate Author : ARMY ARMAMENT RESEARCH DEVELOPMENT AND ENGINEERING CENTER WATERVLIET NY BENET LABS

Personal Author(s) : O'Hara, G. P.

PDF Url : ADA338658

Report Date : FEB 1998

Pagination or Media Count : 29

Abstract : Previously, this author introduced the concept that all screw thread forms have a structural Characteristic Curve, which defines the basic stress concentration as a function of a radial stress in the joint. An additional set of characteristic curves is produced when the general stress field is considered. The standard analysis is for a single thread tooth, isolated from a long chain of identical teeth, that is computationally efficient and facilitates the calculation of a family of characteristic curves. This work presents the characteristic plots for four different threads, the 7 degree British buttress, a 15 degree asymmetric V, the 20 degree Benet buttress, and a special 30 degree V. These four threads were selected because they are or may be useful in high pressure systems. Together they suggest the possibility of a standard thread family for high pressure applications.

Descriptors :   *RADIAL STRESS, *SCREW THREADS, *STRESS CONCENTRATION, LOAD DISTRIBUTION, ELASTIC PROPERTIES, BEARING STRENGTH, STRENGTH(MECHANICS), SHEAR STRESSES, BREECH MECHANISMS, COMPRESSIVE STRENGTH.

Subject Categories : Couplers, Fasteners, and Joints

Distribution Statement : APPROVED FOR PUBLIC RELEASE