3D-NLFEA - Version 1.0.2

Description

Three-Dimensional Non-Linear Finite Element Analysis (3D-NLFEA) is a high-performance program that can solve large problems in a single PC. 3D-NLFEA use SALOME 8.3.0 as the pre-processor and ParaView 5.3.0 as the post-processor. The parallel computation is using Task Parallel Library (TPL) in .Net 4.6.0. To accelerate the computation, some of the return mapping algorithm were accelerated with OPENCL using Cloo.Net library. 3D-NLFEA is now under heavy development and will be the main computer program in our future research. Extension into cluster computing is now underways. 3D-NLFEA support lots of feature as in the commercial software package. 3D-NLFEA has been tested running many hours of simulation starting from a simple to a very complex one.

Created By:

Available Constitutive Model

- Von-Mises, Tresca, Mohr-Coulomb, Drucker-Prager.
- Piscesa et. al. (2017) plasticity model [1]
- Piscesa et. al. (2016) plasticity model [2]
- Papanikolau et. al. (2007) plasticity model [3]
- Bao et. al. (2013) plasticity model [4]
- Mazars et. al. (2016) damage model [5]

Future Development:

- Preparation for multi-scale analysis coupled with chemical processes.

- Scaling-up 3D-NLFEA to cluster computing using Windows Communcation Foundation (WCF)

References:

[1] 2017, B Piscesa, MM Attard, AK Samani, S Tangaramvong, "Plasticity Constitutive Model for Stress-Strain Relationship of Confined Concrete.", ACI Structural Journal 114 (2), 361.
[2] 2016, B Piscesa, MM Attard, AK Samani, "A lateral strain plasticity model for FRP confined concrete.", Composite Structures 158, 160-174.
[3] 2007, VK Papanikolaou, AJ Kappos, "Confinement-sensitive plasticity constitutive model for concrete in triaxial compression.", International Journal of Solids and Structures 44 (21), 7021-7048.
[4] 2013, JQ Bao, X Long, KH Tan, CK Lee, "A new generalized Drucker–Prager flow rule for concrete under compression.", Engineering Structures, 2013.
[5] 2015, J Mazars, F Hamon, S Grange, "A new 3D damage model for concrete under monotonic, cyclic and dynamic loadings.", Materials and Structures 48 (11), 3779-3793.

Nonlinear Method Supported

- Full load control
- Full displacement control
- Load control with arc-length (Riks/Crisfield)
- Load control with orthogonal residual method (Krenk)
- Process Modification (PM) to accelerate the convergence of nonlinear problem (Ray Lawther)
- Innovative Tangent Stiffness Like Projection Method (ITSLPM-Piscesa et. al.) to massively accelerate the covergence
- Initial Stiffness Method (ISM) acceleration. (Dang et. al.)

Advanced Non-Linear Analysis

- Nonlinear buckling analysis
- Interface element (contact, slip and separation)

Other Contributors:

No one at the moment...

Linear Algebra:

3D-NLFEA use several linear algebra library.