| Abstract: | Plasticine rheology has been investigated in plane strain compression and stress relaxation tests. Constant strain rate tests indicate Reiner-Rivlin fluid characteristics or alternatively the deformation properties of plasticine may be described by a constitutive flow law of the type e = K σN where N= 6–9. This relationship was found for the three types of plasticine studied. Relaxation data indicate complex behaviour with probable structure changes during deformation. Under plane strain conditions at 25°C inhomogeneous flow characterized by ductile shears often occurs at high strains in all three types of plasticine. These effects were not apparent during 45°C tests. The application of plasticine analogues to simulate rock structures is discussed. |
