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Failure modes for polycarbonate under clearance‐fit pin‐loading
Author(s) -
Naik R. A.,
Prabhakaran R.
Publication year - 1987
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.760272206
Subject(s) - failure mode and effects analysis , materials science , buckling , tension (geology) , polycarbonate , von mises yield criterion , structural engineering , composite material , finite element method , cleavage (geology) , stress (linguistics) , compression (physics) , engineering , linguistics , philosophy , fracture (geology)
The failure modes and failure sequences for polycarbonate specimens loaded by a clearance‐fit pin were investigated. Specimens were tested in various configurations to produce failures by different engineering failure modes. Photographs of the isochromatic fringe patterns were taken at different levels of damage development to examine the failure modes. A finite element stress analysis was used to explain the observed failure onset modes. Damage onset predictions were made based on a modified von Mises criterion. Failures involving net‐tension damage initiated in the net‐tension mode and failed ultimately in the same mode. Cleavage failures were observed for specimens with very small end‐distances. Bearing failures were preceded by damage onset in a net‐tension mode. Certain large‐hole specimens failed in a buckling failure mode.