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Interface and interconnection stresses in electronic assemblies – A critical review of analytical solutions

Wong, E. H. (author)
Monash University,Nanyang Technological University
Liu, Johan, 1960 (author)
Chalmers tekniska högskola,Chalmers University of Technology
 (creator_code:org_t)
Elsevier BV, 2017
2017
English.
In: Microelectronics and Reliability. - : Elsevier BV. - 0026-2714. ; 79, s. 206-220
  • Research review (peer-reviewed)
Abstract Subject headings
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  • The closed-form solutions for the interfacial stresses in assemblies constituting of two relatively stiff adherends sandwiching a relatively compliant adhesive layer are reviewed. The closed-form solutions are categorised into the “non-free edge solutions” that do not satisfy the nil-shear stress condition at the free edge of the adhesive and the “free edge solutions” that do. Being strength of material solutions, the non-free edge solutions are significantly simpler in form. On the other hand, the solutions tend to grossly underestimate the magnitude of the peeling stress at the free edge. Almost all classical “non-free edge solutions” suffer from two setbacks: (i) assumed ?a = 0, thus severely underestimating the magnitude of the peeling stress; and (ii) neglected the thickness of the adhesive in their formulation of the x-compliance of assemblies and the evaluation of the effective bending strain on adherends; the former leads to overestimation while the latter leads to gross underestimation of the shear stress (and hence, ?a(l)). These are demonstrated in a numerical exercise in which two widely followed “non-free edge solutions” and a simplified “free edge solutions” are benchmarked against the finite element analysis.

Subject headings

TEKNIK OCH TEKNOLOGIER  -- Elektroteknik och elektronik (hsv//swe)
ENGINEERING AND TECHNOLOGY  -- Electrical Engineering, Electronic Engineering, Information Engineering (hsv//eng)

Keyword

Interfacial stresses
Solder joints
Bonded joints
Sandwich assemblies
Closed form
Free edge

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Wong, E. H.
Liu, Johan, 1960
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ENGINEERING AND TECHNOLOGY
ENGINEERING AND ...
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Chalmers University of Technology

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