CP1 07.indb
نویسندگان
چکیده
Bulk properties of open cell polyurethane foam are studied in a hydrostatic compression experiment under strain control. A linear region of behaviour is observed in the stress-strain curve, followed by a non-monotonic region corresponding to a negative incremental bulk modulus. The bulk modulus in the linear region is in reasonable agreement with the value calculated from compressional Young’s modulus and Poisson’s ratio. The linear region of behaviour in hydrostatic compression corresponds to less than half the axial strain range observed in axial compression.
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