摘要
By replacing a medium with reinforcing components oriented and distributed uniformly in a mul- ti-dimensional space,a constitutive model is constructed.The components are extended/compressed compatibly with the strain and the resultant of load exerted on them to balance the stress.Their load-elongation relation can be determined from a conventional material test.Each component undergoes different elongation history depending on its own orientation during deformation,so that the model can simulate elasto-plastic behavior of materials un- der polyaxial loading conditions.The incremental constitutive matrix bas been derived for application in numeri- cal analysis and a yield criterion is also introduced.A few subsequent yield surfaces have been predicted and com- pared with experiments.
By replacing a medium with reinforcing components oriented and distributed uniformly in a mul- ti-dimensional space,a constitutive model is constructed.The components are extended/compressed compatibly with the strain and the resultant of load exerted on them to balance the stress.Their load-elongation relation can be determined from a conventional material test.Each component undergoes different elongation history depending on its own orientation during deformation,so that the model can simulate elasto-plastic behavior of materials un- der polyaxial loading conditions.The incremental constitutive matrix bas been derived for application in numeri- cal analysis and a yield criterion is also introduced.A few subsequent yield surfaces have been predicted and com- pared with experiments.
