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Rate dependent response of modified polystyrene to multiaxial loading
Author(s) -
Walker D. A.,
Roberts L. R.
Publication year - 1965
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.760050317
Subject(s) - materials science , polystyrene , expanded polystyrene , toughness , stiffness , composite material , brittleness , fabrication , natural rubber , strain rate , service life , range (aeronautics) , polymer , medicine , alternative medicine , pathology
Abstract The balance of engineering properties of rubber‐modified polystyrene make it attractive for many applications, but it is difficult for the design engineer to relate laboratory data to service requirements because of differences in strain rates, temperatures, etc. Data are presented which show how the toughness and stiffness of an appliance‐grade, impact polystyrene vary with impact velocity (or loading rate), temperature, fabrication method, and pigment level. The ability to survive multi‐axial impact loads is strongly dependent on loading rate; a maximum in energy‐absorbing ability was observed in the range 500–2000 in./in./min, where the failure mechanism changed from ductile to brittle.