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Concept
Post processing
multiPlas is a material library which provides the material models for FEM calculations in ANSYS in the field of civil engineering and geotechnics. multiPlas contains efficient, realistic material models for masonry, soil, rock, sand, concrete, reinforced concrete, steel, wood, mortar and stone. The material models are based on elasto-plastic flow criterion with associated and non-associated flow rules. For FEM calculations in ANSYS, multiPlas has an efficient and robust algorithm for the proceeding of single and multi surface plasticity. Special feature of the material models is the interconnection of isotropic and anisotropic yield conditions which can be combined in numerous ways by the user.
Application
Foundation stability
In the ANSYS besides the plastic strain one can output the plastic activities. The plastic activities serve for illustrating which flow condition is active, i.e. violated, in the respective area of the structure. From this one can deduct the type and cause of the load shifting.
The material models are available as well as solid element, shell element or plate element. The successful practical applications of the material models reach from non linear masonry or concrete calculations to stability calculation in soil or joint rock.
Material models
In multiPlas the following material models are included amongst others:
- Tresca (e.g. for steel)
- Mohr-Coulomb, isotropic (e.g. for soil, intact rock, natural stone masonry)
- Mohr-Coulomb Joint Modell, anisotropic (e.g. for seperation planes, joint)
- Mises (e.g. for steel, various metal)
- Drucker-Prager (e.g. for soil, sand)
- Drucker-Prager singular concrete model (e.g. for concrete, ferrow concrete, lime sand brick)
- Ganz (e.g. for masonry)
- Tsai / Wu (e.g. for wooden materials)
- Orthotrophic maximum strain limit (e.g. for wood)
- Nominal tensile stress limit
- Draft models (e.g. for generic refractory materials)
- User defined material model
Phenomena
Using the material models in multiPlas the following phenomena can be accounted for:
- Isotropic / anisotropic elasto plasticity
- Associated / non associated plasticity, scattering of the dilation behaviour
- Hardening and softening, non linear stress and strain behaviour
- Residual strength, tearing, deterioration
- Temperature dependencies
Cracking; plastic deformation
Publications
Schlegel, R.: Nichtlineare Berechnung von Beton und Stahlbetonstrukturen nach DIN 1045-1 mit ANSYS. 23st CAD-FEM Users' Meeting 2005, International Congress on FEM Technology, Bonn, Germany, 2005
Will, J.; Müller, U.: Nachweis von Stauanlagen nach E-DIN 19700 mit ANSYS. 20th CAD-FEM Users Meeting 2002, International Congress on FEM Technology, Friedrichshafen, Germany, 2002
Further Papers can be found in our online library.
Distributors
multiPlas is distributed worldwide. Find a list of our resellers here.
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