A Survey of Fracture Design Practices for Ordnance Structures.
Abstract
Numerous catastrophic failures and extreme unreliability of weapons in the past have led to deisgn procedures which apply not only mathematical and laboratory analysis but also systematic 'design by experiment' approaches. Full-scale testing under actual field conditions is a key part of present-day weapons programs. The principal deterrent ot brittle failure in materials of moderate strength has been the ability to provide tough materials. The use of very high strengh materials to meet the military requirement for lightweight, air-transportable, highly mobile weapons has created the need for more meaningful and usable measures of toughness in materials since 'obviously safe' toughness values cannot always be provided. Weapons designers now must be knowledgeable in the fracture behavior of the less ductile materials and proficient in the use of advanced techniques in stress analysis and fracture analysis. The standard requirement for successful field test performance under severe use conditions continues to be of great importance. Since critical ordnance problems involve many complicating factors, recent linear elastic fracture mechanics developments are usable only as guides for preliminary proportioning. The endurance life test remains a key mandatory criterion for establishing finite life limits. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Mar 01, 1968
- Accession Number
- ADA020306
Entities
People
- Jiro Adachi
Organizations
- United States Army Research Laboratory