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Isothermal Creep Behavior of 3M™ Scotch-Weld™ EC-2216 B\A in Single Lap Joints

[+] Author Affiliations
Arman Dabiri, Edgar Madril

University of Arizona, Tucson, AZ

Paper No. DETC2016-60376, pp. V006T09A019; 8 pages
doi:10.1115/DETC2016-60376
From:
  • ASME 2016 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference
  • Volume 6: 12th International Conference on Multibody Systems, Nonlinear Dynamics, and Control
  • Charlotte, North Carolina, USA, August 21–24, 2016
  • Conference Sponsors: Design Engineering Division, Computers and Information in Engineering Division
  • ISBN: 978-0-7918-5018-3
  • Copyright © 2016 by ASME

abstract

This paper studies the isothermal creep behavior of the 3M™ Scotch-Weld™ EC-2216 B\A Gray (EC-2216) epoxy in single lap joints subjected to a uniaxial tensile load. The time-independent mechanical properties of EC-2216 such as the Young’s modulus, shear modulus, and bulk modulus have been reported in the literature, but the results are not consistent. However, to the best knowledge of the authors its shear stress-strain constitutive equation has not been obtained yet. Thus, in this paper, we propose the shear stress-strain constitutive equation of the EC-2216 in single lap joints subjected to uniaxial tensile tests at room temperature (24±3°C). First, a viscoelastic model is estimated in short-term experiments within the viscoelastic regime. Second, the creep deformation of the EC-2216 is modeled by different conventional imperial models. Third, different conventional creep rate models are used to estimate the steady state creep rate of the third stage, which mainly indicates the longevity of the material. Moreover, the failure accumulate strain is obtained based on the maximum strain criterion, for different shear stress levels. Finally, the proposed models are compared to the current published data.

Copyright © 2016 by ASME
Topics: Creep

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