STP876

    Repeatability of Mixed-Mode Adhesive Debonding

    Published: Jan 1985


      Format Pages Price  
    PDF (220K) 15 $25   ADD TO CART
    Complete Source PDF (8.7M) 15 $70   ADD TO CART


    Abstract

    An experimental study was undertaken to assess the repeatability of debond growth rates in adhesively bonded joints subjected to constant-amplitude cyclic loading. This was done by comparing debond growth rates from two sets of cracked-lap-shear specimens that were fabricated by two different manufacturers and tested in different laboratories. The fabrication method and testing procedure were identical for both sets of specimens. The specimens consisted of aluminum adherends bonded with FM-73 adhesive. Critical values of strain-energy-release rate were also determined from specimens that were monotonically loaded to failure. The test results showed that the debond growth rates for the two sets of specimens were within a scatterband similar to that observed in fatigue crack growth in metals. Cyclic debonding occurred at strain-energy-release rates that were more than an order of magnitude less than the critical strain-energy-release rate in static tests.

    Keywords:

    fatigue, adhesive, cyclic debonding, strain energy, repeatability


    Author Information:

    Everett, RA
    Structures Laboratory, U.S. Army Research and Technology Laboratories (AVSCOM), NASA Langley Research Center, Hampton, VA

    Johnson, WS
    Aero-Space Technologist, NASA Langley Research Center, Hampton, VA


    Paper ID: STP36309S

    Committee/Subcommittee: E08.06

    DOI: 10.1520/STP36309S


    CrossRef ASTM International is a member of CrossRef.