Accession Number : ADA195911

Title :   Structural Analysis of the Walleye Mark 13 Container Cover.

Descriptive Note : Final rept. 27 Jun 84-31 Jan 85,

Corporate Author : SOUTHWEST RESEARCH INST SAN ANTONIO TX

Personal Author(s) : Labra, J J ; Cox, P A ; Hamer, W L

PDF Url : ADA195911

Report Date : Aug 1984

Pagination or Media Count : 24

Abstract : This detailed structural analysis of the WALLEYE MARK 13 container cover assembly included limited nondestructive thermal testing to delineate polyvinyl chloride material dimensional stability to elevated temperatures. A detailed review of existing cover assembly inspection and repair procedure was also performed. The structural analysis investigated the concentrated stress sensitivity of the cover assembly to (undersized) width/length variations. In particular, cover stress concentrations were delineated which could occur during 'latching down' procedures of the cover to the base assembly. Stress analysis of the cover assembly demonstrated a significant sensitivity of cover stress levels to cover width and length variations from its base assembly, while the thermal testing suggested a possible cause of the failure problem. The proposed maintenance, inspection and repair procedures defined in NAVAIR Technical Manual 11-70KAA-1 should significantly reduce the potential of crack reoccurrence. However, geometric irregularities associated with difficult-to-repair cracks within the aluminum extrusion could be the source of crack re-initiation under normal cradle operational conditions. Keywords: Polyvinyl chloride; Guided weapon components; Dimensional stability; Reliability; Maintainability. (edc)

Descriptors :   *POLYVINYL CHLORIDE, *STRESS CONCENTRATION, *COVERINGS, ALUMINUM, ASSEMBLY, CRACKS, EXTRUSION, FAILURE, GUIDED WEAPONS, HIGH TEMPERATURE, INSPECTION, LATCHES, MAINTAINABILITY, NONDESTRUCTIVE TESTING, RATES, RELIABILITY, REPAIR, SENSITIVITY, SIZES(DIMENSIONS), STABILITY, STRESS ANALYSIS, STRESSES, STRUCTURAL ANALYSIS, SUPPORTS, TEST AND EVALUATION, THERMAL PROPERTIES

Subject Categories : Plastics
      Guided Missiles

Distribution Statement : APPROVED FOR PUBLIC RELEASE