Elastoplastic Calibration

You can do a lot with UniaxialMaterials in OpenSees--springs, fibers, trusses, section aggregators, etc. Although over 130 UniaxialMaterials are available, it's likely that only about a dozen see regular use. So, with all due respect to Concrete23, my favorite regular is HardeningMaterial. It's straight out of Simo and Hughes and was the example material for … Continue reading Elastoplastic Calibration

Uniaxial Multi-Tool

UniaxialMaterial models are the work horses of OpenSees. Originally developed for the truss element, these models have proliferated thanks to fiber section models. However, because they are simply scalar functions, UniaxialMaterial models can be used in several other contexts. The calling function knows the context, not the UniaxialMaterial model--it only provides an output for a … Continue reading Uniaxial Multi-Tool