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Reliability of Adhesive Bonds Under Severe Environments (1984) / Chapter Skim
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'STATE OF THE ART: MECHANICS'
Pages 21-26

The Chapter Skim interface presents what we've algorithmically identified as the most significant single chunk of text within every page in the chapter.
Select key terms on the right to highlight them within pages of the chapter.


From page 21...
... as a means of determining parameters that can be used to predict the performance of actual practical joints. It is in this third very difficult area that adhesive fracture mechanics holds particular promise.
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From page 22...
... A persuasive argument can be made that failure initiation would likely be related more to large local stresses, local stress variations, and/or flaws than it is to average values of a given stress type. Problems, such as those just outlined, with limiting stress criteria for predicting failure have led engineers and scientists to seek alternative methods that can treat singularities, using parameters obtained from a given test to predict performance of joints with different geometries.
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From page 23...
... and fatigue crack growth. Tests are needed to determine the critical value of the energy release rate GC, the critical stress intensity factor Kc, or the critical value of the J integral Jc (perhaps for each of the loading modes)
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From page 24...
... inspection; thermal inspection methods, including variations in thermal conductivity, thermal emissivity, thermal capacity, or local differences in thermal expansion; acoustic emission; acoustic inspection, such as the coin tap and its related instrumental counterparts like the Fokker Bond Tester Type I; ultrasonic techniques, including throughtransmission, pulse echo techniques, resonance techniques, and spectral analysis; and holographic interference. The current state of the art for locating and determining the size of flaws is quite good and is progressing rapidly.
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From page 25...
... Final Report under contract #N00019-73-C-0163. Watertown, Massachusetts: Materials Research Laboratory, Army Materials and Mechanics Research Center.
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Key Terms

  • experimental techniques
  • adhesive fracture
  • energy release
  • hostile environments
  • stress intensity

  • stress concentrations
  • stress distributions
  • stress field
  • adhesive failure
  • reported average

  • peel tests
  • severe environments
  • release rate
  • computer techniques
  • intensity factor

  • critical value
  • tensile stresses
  • predict performance
  • practical joints
  • actual stress

  • fracture mechanical
  • cohesive fracture
  • critical stress
  • fracture energies
  • local stress

  • shear stress
  • thin adherends
  • normal tangential
  • coin tap
  • base future


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