• FreeTO is an open-source code for 3D topology optimization and post-processing in Matlab.
• FreeTO is compatible with several popular Matlab codes for topology optimization.
• FreeTO employs SEMDOT and SIMP and performs better with the ...

Topology optimization has revolutionized the design of structures for various applications, particularly with the advancement of additive manufacturing. However, existing open-source codes for topology optimization have limitations, such as ...

Deployable rib-mesh reflector antennas, known for their ultralight nature and high deployment-to-stowage ratio, have been attracting attention from both the aerospace industry and academia. Form finding is a critical step in determining the ...

• FEM techniques for form finding of tensile cable-membrane structures are detailed.
• Elastic deformation of supporting frames is included in the form finding procedure.
• Benchmark cases are solved to validate the accuracy of the ...

• A novel geometric smoothing method can improve the quality of polyhedral meshes.
• Inverted elements in polyhedral meshes can be eliminated and mesh untangling is achieved.
• The method involves element transformation and stitching ...

Mesh smoothing is a critical technique for enhancing mesh quality. Recently, polyhedral meshes have gained prominence in Computational Fluid Dynamics (CFD), with orthogonality being a common metric for evaluating these meshes. This paper ...

In industrial numerical simulations, efficiently generating high-quality tetrahedral meshes remains a significant challenge. Advances in high-performance computing have made parallelization a practical approach to improving the quality of large-...

• Use atomic operations to maintain topological correctness and parallel efficiency.
• Use axis-aligned decomposition to reduce task overlap in parallel optimization.
• Create a multithreaded memory model to reduce synchronization and ...

• A new parameterized method for modeling orthotropic steel deck (OSD) is presented.
• Two Abaqus plugins are developed via Abaqus graphical user interface based on Python.
• In the presented plugins, all modeling processes in Abaqus are ...

This paper presents a new parameterized method for establishing OSD models and analyzing WRS, and two plugins are developed based on the graphical user interface (GUI) of Abaqus. This parameterized method addresses the extremely high cost of ...

• Developing a high-order curvilinear mesh generation software, Gridder-HO, with commonly used element types support and capable of elevating up to P3 order.
• Utilizing concurrent hash table, thread pool, and ADT data structure for ...

The advancement in high-order computational methods is reshaping the landscape of mesh generation in Computational Fluid Dynamics (CFD), steering the focus towards curvilinear mesh techniques to meet the escalating accuracy demands. Gridder-HO, ...

This paper presents a novel algebraic workflow for topological voxelization of spatial objects, construction of voxel connectivity graphs & hyper-graphs, and derivation of partial differential and multiple integral operators. Discretization of ...

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• A methodology for topological voxelization and derivation of differential operators.
• A graph construction method from voxel stencils extendable to irregular complexes.
• New results in spectral graph theory: namely the derivation of ...

• Analyze concrete crack shapes in dataset and adapt YOLO-based model accordingly.
• Propose two multiple branch-shaped blocks to optimize the model's performance.
• Employ depthwise separable convolutions to reduce the model size.
• ...

Deep learning algorithms have been employed for real-time concrete crack detection. However, many algorithms are not specifically tailored for this purpose. Moreover, their lightweight iterations are generally optimized at the macro-model level, ...

• A novel multi-material topology optimization using Nitsche-type isogeometric analysis is proposed.
• The proposed method can be applied in design domains that are composed of multiple conforming or non-conforming NURBS patches.
• ...

In design optimization of structures, design domains are often described by multiple non-uniform rational B-spline (NURBS) patches. To perform multi-material topological design in such design domains, an effective Nitsche-based multi-material ...

In this work, a novel method is proposed to design light-weight infill structure based on polyhedral cells for 3D printing, which satisfies the self-supporting, manufacturability and structural strength. To achieve self-supporting, specified ...

• A parametric polyhedral cell with adjustable filling rate is proposed.
• A strategy for arrays of cell centroids in 3D space is proposed.
• The infill structure supports both itself and overhanging surface of the model.
• An ...

Topology optimization is a renowned structural optimization approach used to compute the optimal topology for the enhancement of structural performance. It has been in common practice in different engineering fields such as automobile and ...

• High accuracy structural response evaluation through Element free Galerkin method for structural evolution.
• Conversion of topology optimization results into parametric CAD model through a new Hausdorff distance and standard deviation ...

This paper presents a novel methodology for robust Finite Element (FE) mesh generation of Discrete Fracture Matrix (DFM) models. The method can handle the complete multi-dimensional domain from the tridimensional porous rock matrix, through ...

• Meshing methodology for DFM models preserving initial coarse mesh.
• Robust conformal meshes for porous media, fractures, and fracture intersections.
• Non-manifold constraints eliminated by extending or truncating fracture surfaces.

Topology optimization has seen increased interest with the rise of additive manufacturing (AM) as a fabrication method, because of its ability to exploit the geometric complexity that AM offers. However, AM still imposes some geometric ...

• The cumulative sum flood fill approach is introduced in topology optimization.
• The approach works as a filter and successfully eliminates enclosed voids.
• Direct control can be achieved over the amount, location, and size of access ...

This paper proposes a new topology optimization method to obtain super-resolution images without increasing mesh refinement by using various methods. For traditional process, low-resolution (LR) images are fed into the Solid Isotropic ...

• Topology optimization method is proposed using super-resolution image reconstruction.

• Constructing a novel combined cubic generalized Ball (CCG-Ball, for short) surfaces.

The construction and shape optimization of complex shape-adjustable surfaces is a crucial and intractable technique in Computer Aided geometric Design (CAGD), which has a wide range of application value in many product designs and ...

• A method of design for ball Said-Ball (BSB) curve is proposed.
• The geometrical ...

The representation method of curves and surfaces is an essential tool in industrial design, while a ball curve with adjustable thickness has its advantages in representing freedom tubular objects. By combing the Said-Ball basic ...

• An enhanced strategy for adaptive Cartesian grid generation is proposed.
• A rapid Cartesian-triangle intersection determination method is developed.
• The efficiency of Cartesian grid generation for complex 3D geometry is assessed.

This article presents an enhanced strategy for generating Cartesian grids for arbitrary complex three-dimensional (3D) geometry. It addresses the major challenges, including data structures managing surface triangles and Cartesian cells, ...

One of the factors responsible for the mechanical strength of objects manufactured by thermoplastic extrusion 3D printers is the adhesion between adjacent material beads in the same layer. This, in turn, depends on the time lapsed ...

• Strength of a 3D printed part depends on good bonding between infill rasters.
• ...

• The neutral layer offset was obtained by SD-BEM.
• Compared with FEM, experiment ...

The medium and thick plate was developed in modern industrial production. In the production process, the shape defects occurred easily and it could be straightened generally by flattening machine. However, due to the offset ...

• Generation of digital images of Voronoi, Laguerre and Johnson-Mehl tessellations.

This article presents an algorithm to compute digital images of Voronoi, Johnson-Mehl or Laguerre diagrams of a set of punctual sites, in a domain of a Euclidean space of any dimension. The principle of the algorithm is, in a first ...