Accession Number : ADA307565

Title :   Nondestructive Tests for Structural Adhesives,

Corporate Author : STANFORD RESEARCH INST MENLO PARK CA

Personal Author(s) : Vincent, Coye T.

PDF Url : ADA307565

Report Date : AUG 1957

Pagination or Media Count : 27

Abstract : The use of high strength adhesives in the fabrication of metal composite structures is a technique which is coming into extensive use in many fields of design and manufacturing, particularly those related to aircraft. The use of adhesives and adhesive techniques made it possible to satisfy design requirements that would be extremely difficult or even impossible to satisfy by conventional fastening methods. Since these high strength adhesives are thermosetting in the main, obtaining their ultimate strength at the end of a cure, the quality of these bonds is widely affected by a number of factors. Destructive tests such as tension, compression, and shear tests, together with a specialized test called a peel test are widely used. All of these methods determine bond quality by destroying the bond, which has the disadvantage of making the tested assembly unusable. As a result, the evaluation of usable bonded assemblies is based upon rigid process control and random destructive testing of production run parts. These methods are quite satisfactory in some applications. However, there are many applications in which a direct and immediate indication of bond strength of usable assemblies is necessary.

Descriptors :   *NONDESTRUCTIVE TESTING, *ADHESIVES, METALS, SYMPOSIA, AIRCRAFT, ADHESION, COMPOSITE STRUCTURES, STRENGTH(MECHANICS), HIGH STRENGTH, BONDED JOINTS, FASTENINGS, RIGIDITY, THERMOSETTING PLASTICS, DESTRUCTIVE TESTS, PEEL STRENGTH, SHEAR TESTS, STRUCTURAL INTEGRITY.

Subject Categories : Adhesives, Seals and Binders
      Test Facilities, Equipment and Methods

Distribution Statement : APPROVED FOR PUBLIC RELEASE