Journal
EXPERIMENTAL MECHANICS
Volume 51, Issue 9, Pages 1441-1452Publisher
SPRINGER
DOI: 10.1007/s11340-011-9477-0
Keywords
Grey-field photoelasticity; Birefringent coating; Pinned joints; Contact stresses; Friction; Pin clearance; Non-linear problems; Airy stress function
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Funding
- US Air Force [FOSR FA9550-05-1-0289]
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Pinned (bolted) joints are an extremely important, but difficult to analyze, structural or mechanical element. They are a class of inverse problems in which the stresses at the pin/hole interface are typically unknown. Moreover, stresses vary non-linearly with applied load. Failures of mechanical or structural systems frequently initiate at connections. Although almost always present, many stress analyses of such mechanical connections ignore friction for simplicity. The stresses are evaluated here in an aluminum connector using a series solution of an Airy stress function, the coefficients being evaluated from known boundary tractions (near, but not including the contact region on the hole) and photoelastically measured data obtained from a bonded birefringent coating. Both friction and pin/hole clearance are accounted for, and individual stresses are evaluated full-field, including on the contact boundary of the hole.
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