Verification and Validation of a Generalized Orthotropic Material Model MAT213 Implemented in LS-DYNA

2018 ◽  
Author(s):  
LOUKHAM SHYAMSUNDER ◽  
BILAL KHALED ◽  
NATHAN HOLT ◽  
CANIO HOFFARTH ◽  
SUBRAMANIAM RAJAN ◽  
...  
Keyword(s):  
Orthotropic Material ◽  
Material Model ◽  
Verification And Validation

Analysis of Buffering Properties of Honeycomb Material

2012 ◽  
Vol 482-484 ◽  
pp. 1146-1149
Author(s):  
Ming Bo Yang ◽  
Jin Bao Chen ◽  
Fei Deng ◽  
Meng Chen
Keyword(s):  
Theoretical Analysis ◽  
Material Properties ◽  
Orthotropic Material ◽  
Soil Mechanics ◽  
Material Model ◽  
Lunar Soil ◽  
Equivalent Material ◽  
User Material Model ◽  
Honeycomb Material ◽  
Equivalent Material Properties

The buffering properties of honeycomb material are analyzed in the presented work. Theoretical analysis based on energy method is first presented, the buffering process of honeycomb material can be divided into three phases, honeycomb material can be equivalent to orthotropic material and the equivalent material properties are given. Being good at soil mechanics, Abaqus can simulate lunar soil very well. Using a constitutive model for honeycomb material, which is a built-in user material model, the presented work developed a honeycomb material simulation model and verified with a practical example. Now we can analysis the entire landing buffer process in Abaqus, which is a complement to existing analysis processes.

scholarly journals Inverse Calculation of Timber-CFRP Composite Beams Using Finite Element Analysis

2020 ◽  
Author(s):  
Khaled Saad ◽  
András Lengyel
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Material Properties ◽  
Orthotropic Material ◽  
Material Model ◽  
Flexural Behavior ◽  
Fiber Reinforced Polymers ◽  
Element Analysis ◽  
Linear Elastic ◽  
Timber Beams

This study focuses on the flexural behavior of timber beams externally reinforced using carbon fiber-reinforced polymers (CFRP). Linear and non-linear finite element analysis were proposed and validated by experimental tests carried out on 44 timber beams to inversely determine the material properties of the timber and the CFRP. All the beams have the same geometrical properties and were loaded under four points bending. In this paper the general commercial software ANSYS was used, and three- and two-dimensional numerical models were evaluated for their ability to describe the behavior of the solid timber beams. The linear elastic orthotropic material model was assumed for the timber beams in the linear range and the 3D nonlinear rate-independent generalized anisotropic Hill potential model was assumed to describe the nonlinear behavior of the material. As for the CFRP, a linear elastic orthotropic material model was introduced for the fibers and a linear elastic isotropic model for the epoxy resin. No mechanical model was introduced to describe the interaction between the timber and the CFRP since failure occurred in the tensile zone of the wood. Simulated and measured load-mid-span deflection responses were compared and the material properties for timber-CFRP were numerically determined.

A new nonlinear polyconvex orthotropic material model for the robust simulation of technical fabrics in civil engineering applications at large strains – Validation with large-scale experiment/Ein neues polykonvexes orthotropes Materialmodell zur robusten Simulation von Textilmembranen im Bauingenieur- wesen unter Berücksichtigung großer Deformationen – Validierung anhand eines Großbauteilversuchs

Bauingenieur ◽  
2019 ◽  
Vol 94 (12) ◽  
pp. 488-497
Author(s):  
Mehran Motevalli ◽  
Jörg Uhlemann ◽  
Natalie Stranghöner ◽  
Daniel Balzani
Keyword(s):  
Nonlinear Model ◽  
Orthotropic Material ◽  
Large Scale ◽  
Real Life ◽  
Material Model ◽  
Woven Fabric ◽  
Model Parameters ◽  
Elastic Model ◽  
Engineering Applications ◽  
Strain Paths

Abstract A polyconvex orthotropic material model is proposed for the simulation of tensile membrane structures. The notion of anisotropic metric tensors is employed in the formulation of the polyconvex orthotropic term which allows for the description of the interaction of the warp and fill yarns. The model is adjusted to the stress-strain paths of uni- and biaxial tensile tests of a woven fabric and the results are compared with the linear elastic model. The lateral contraction in the uniaxial loading case is taken into account to also capture the strong crosswise interactions. An increased number of load cycles is considered in the experiments to reach a saturated elastic state of the material. A new method is proposed enabling in principle the identification of unique (linear) stiffness parameters by previously identifying the (nonlinear) model parameters. Eventually, the proposed nonlinear model contains only 4 material parameters to be identified for the individual membrane material. Moreover, a new large-scale experimental setting is presented which allows for the validation of the proposed model response in real-life engineering applications. The numerical robustness of the model is tested in an advanced simulation of a large roof structure under application of realistic boundary conditions.

Trabecular bone adaptation with an orthotropic material model

2002 ◽  
Vol 35 (2) ◽  
pp. 247-256 ◽  
Author(s):  
Zev Miller ◽  
Moshe B. Fuchs ◽  
Mircea Arcan
Keyword(s):  
Trabecular Bone ◽  
Orthotropic Material ◽  
Material Model ◽  
Bone Adaptation

Mixed Finite Element for Geometrically Nonlinear Orthotropic Shallow Shells of Revolution

2014 ◽  
Vol 919-921 ◽  
pp. 1299-1302 ◽  
Author(s):  
Leonid U. Stupishin ◽  
Konstantin E. Nikitin
Keyword(s):  
Finite Element ◽  
Numerical Method ◽  
Orthotropic Material ◽  
Mixed Finite Element ◽  
Material Model ◽  
Element Formulation ◽  
Geometrically Nonlinear ◽  
Shells Of Revolution ◽  
Test Task ◽  
Shallow Shells

A numerical method for mixed finite-element formulation shallow shells of revolution is developed. Orthotropic material model is considered. Final equations are derived by the Galerkin’s method. Results of solution of test task are represented. Results precision and convergence are analyzed.

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