nliga

We have hosted the application nliga in order to run this application in our online workstations with Wine or directly.

Quick description about nliga:

A unified framework, NLIGA (Non-Linear Isogeometric Analysis), is developed for mainly solving two and three-dimensional nonlinear problems on the MATLAB platform by using isogeometric analysis (IGA). Nonlinear hyperelastic and elastoplastic materials are primarily considered at this stage. Newton-Raphson method is used to solve the nonlinear governing equations. A series of benchmark examples are performed to validate the procedures. The visualization procedures are also developed to visualize the obtained results including displacements, stresses and numerical errors.

References:
[1] Xiaoxiao Du, Gang Zhao, Wei Wang, Mayi Guo, Ran Zhang, and Jiaming Yang. NLIGA: A MATLAB framework for nonlinear isogeometric analysis. Computer Aided Geometric Design, 2020, 80: 101869.
[2] Xiaoxiao Du, et al. Numerical implementation for isogeometric analysis of thin-walled structures based on a B�zier extraction framework: nligaStruct. Thin-Walled Structures, 2022,180: 109844.

Features:

• Nonlinear hyperelastic problems
• Nonlinear elastoplastic problems
• Hyperelastic materials Mooney-Rivlin, Neo-Hookean, Yeoh, etc
• Plane and solid elastic problems
• Poisson problems
• Plate and shell problems
• Conforming multi-patch problems
• Boundary conditions imposition
• Stress recovery from the Gaussian integration points
• Post-processing of the results distribution
• Nonlinear Kirchhoff-Love shell
• B�zier extraction
• Thin-walled structures
• NURBS and T-splines
• St. Venant-Kirchhoff materials

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