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In‐plane compression of constrained preforms
Author(s) -
Norman David A.,
Kim JaeHo,
Robertson Richard B.
Publication year - 2001
Publication title -
polymer composites
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.577
H-Index - 82
eISSN - 1548-0569
pISSN - 0272-8397
DOI - 10.1002/pc.10546
Subject(s) - fixture , materials science , clamping , composite material , compression (physics) , buckling , deformation (meteorology) , mold , stress (linguistics) , structural engineering , mechanical engineering , engineering , linguistics , philosophy
Preforms constructed from a plain‐weave, glass fabric were compressed in‐plane within a fixture that mimicked the constraints of a closed mold. Typically, a gap was left between the bottom of the preform and the floor of the fixture; upon Initial compression, the preform slid within the fixture, which allowed the friction between the preform and the fixture wall to be measured. The preform began to compress as it contacted the floor of the fixture. The deformation was proportional to the applied stress until a critical stress was reached. Above this stress, the preform sustained damage in the form if localized buckling and a corresponding decrease in mechanical integrity. The in‐plane compressive behavior varied with system parameters, such as preform geometry, fabric orientation, and clamping stress and was shown to be strongly dependent on friction of the preform against the fixture wall. A model was developed to describe the contribution of preform friction with the fixture wall to the in‐plane compressive behavior of constrained preforms.