Accession Number:

ADA090005

Title:

An Experimental Investigation of Stresses in a Steel Model of an Overloaded Breech Ring by Means of Photoelastic Coating Technique

Descriptive Note:

Technical rept.

Corporate Author:

ARMY ARMAMENT RESEARCH AND DEVELOPMENT CENTER WATERVLIET NY LARGE CALIBER WEAPON SYSTEMS LAB

Personal Author(s):

• Cheng, Y. F.

Report Date:

1980-08-01

Pagination or Media Count:

29.0

Abstract:

An experimental investigation of stresses at the lower fillet in a two dimensional steel model of an overloaded breech ring by means of photoelastic coating technique has been made. The basis of the technique is given. Expressions for stress and strain in both the elastic and elasto-plastic state are derived. Maximum fillet stress, stress concentration factor, as well as the residual stress after unloading were found. The results were compared with previous data from polycarbonate model.

Descriptors:

• *BREECH MECHANISMS
• *PHOTOELASTICITY
• *STRESS CONCENTRATION
• *STRESSES
• COATINGS
• ELASTIC PROPERTIES
• EXPERIMENTAL DATA
• MODELS
• ORDNANCE STEEL
• OVERLOAD
• PLASTIC PROPERTIES
• POISSON RATIO
• POLYCARBONATES
• RESIDUAL STRESS
• STRESS ANALYSIS
• STRESS STRAIN RELATIONS
• TWO DIMENSIONAL

Subject Categories:

• Fire Control and Bombing Systems
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE