@article{MTMT:34669219, title = {Improved stochastic subset optimization method for structural design optimization}, url = {https://m2.mtmt.hu/api/publication/34669219}, author = {Khalid, Mohd Aman and Bansal, Sahil}, doi = {10.1016/j.advengsoft.2023.103568}, journal-iso = {ADV ENG SOFTW}, journal = {ADVANCES IN ENGINEERING SOFTWARE}, volume = {188}, unique-id = {34669219}, issn = {0965-9978}, keywords = {STOCHASTIC SIMULATION; Stochastic optimization; Voronoi tessellation; Optimization under uncertainty; Stochastic subset optimization}, year = {2024}, eissn = {1873-5339} } @article{MTMT:34644980, title = {SMT 2.0: A Surrogate Modeling Toolbox with a focus on hierarchical and mixed variables Gaussian processes}, url = {https://m2.mtmt.hu/api/publication/34644980}, author = {Saves, Paul and Lafage, Remi and Bartoli, Nathalie and Diouane, Youssef and Bussemaker, Jasper and Lefebvre, Thierry and Hwang, John T. and Morlier, Joseph and Martins, Joaquim R. R. A.}, doi = {10.1016/j.advengsoft.2023.103571}, journal-iso = {ADV ENG SOFTW}, journal = {ADVANCES IN ENGINEERING SOFTWARE}, volume = {188}, unique-id = {34644980}, issn = {0965-9978}, keywords = {Gaussian process; kriging; surrogate modeling; Hierarchical problems; Hierarchical and mixed-categorical inputs; Meta variables}, year = {2024}, eissn = {1873-5339}, orcid-numbers = {Diouane, Youssef/0000-0002-6609-7330} } @article{MTMT:34608942, title = {Topology optimization of Shell-Infill structures with enhanced edge-detection and coating thickness control}, url = {https://m2.mtmt.hu/api/publication/34608942}, author = {Postigo, Jose A. and Garaigordobil, Alain and Ansola, Ruben and Canales, Javier}, doi = {10.1016/j.advengsoft.2023.103587}, journal-iso = {ADV ENG SOFTW}, journal = {ADVANCES IN ENGINEERING SOFTWARE}, volume = {189}, unique-id = {34608942}, issn = {0965-9978}, abstract = {Topology optimization is a valuable tool in additive manufacturing, but its application requires careful consideration of various constraints to refine the optimization outcome. In additive manufacturing, components often consist of two distinct regions: a solid shell forming the exterior and a porous infill occupying the interior. This work introduces a novel approach based on the SIMP (Solid Isotropic Material with Penalization) method, aiming to optimize both the shell and infill concurrently. The proposed method incorporates a series of filtering processes that effectively separate the structure into two phases: the shell and the infill. This separation allows for precise control over the desired coating thickness by employing the SUSAN edge -detector method and introducing a new parameter designed for explicit thickness control. Additionally, a new constraint based on the structural skeleton has been introduced to ensure the preservation of a minimum length scale.}, keywords = {COATING; Topology optimization; Minimum length scale; Shell-infill}, year = {2024}, eissn = {1873-5339}, orcid-numbers = {Ansola, Ruben/0000-0001-6405-4006} } @article{MTMT:34581550, title = {Topology optimization for energy absorption of quasi-brittle structures undergoing dynamic fractures}, url = {https://m2.mtmt.hu/api/publication/34581550}, author = {Wu, Yi and Li, Pengfei and Li, Qiqi and Liu, Bo}, doi = {10.1016/j.advengsoft.2023.103567}, journal-iso = {ADV ENG SOFTW}, journal = {ADVANCES IN ENGINEERING SOFTWARE}, volume = {187}, unique-id = {34581550}, issn = {0965-9978}, abstract = {In this paper, we introduce a topology optimization approach aimed at improving the energy absorption of quasi-brittle structures under impact loading. Our method focuses on incorporating dynamic fracture behavior throughout the impact process to maximize the energy acting on the structure. To achieve this, we integrate a dynamic phase field method into density-based topology optimization, enabling us to simulate the initiation and propagation of complex dynamic fractures. The optimization formulation aims to maximize the absorbed energy over a specified period while adhering to material volume and compliance constraints. Sensitivity analysis was originally provided to accelerate computations and optimization. Several numerical examples show that the incorporation of dynamic fracture effects leads to superior energy absorption of the optimized structure compared to static strategies or neglecting the fracture process. Moreover, the proposed scheme facilitates tailored designs for different impact loading rates.}, keywords = {DYNAMICS; Energy absorption; Topology optimization; SIMP; Fracture phase-field method}, year = {2024}, eissn = {1873-5339} } @article{MTMT:34579598, title = {Advanced elasto-plastic topology optimization of steel beams under elevated temperatures}, url = {https://m2.mtmt.hu/api/publication/34579598}, author = {Habashneh, Muayad and Cucuzza, Raffaele and Domaneschi, Marco and Movahedi Rad, Majid}, doi = {10.1016/j.advengsoft.2024.103596}, journal-iso = {ADV ENG SOFTW}, journal = {ADVANCES IN ENGINEERING SOFTWARE}, volume = {190}, unique-id = {34579598}, issn = {0965-9978}, year = {2024}, eissn = {1873-5339} } @article{MTMT:34523794, title = {Design of the multiphase material structures with mass, stiffness, stress, and dynamic criteria via a modified ordered SIMP topology optimization}, url = {https://m2.mtmt.hu/api/publication/34523794}, author = {Nguyen, M.-N. and Lee, D.}, doi = {10.1016/j.advengsoft.2023.103592}, journal-iso = {ADV ENG SOFTW}, journal = {ADVANCES IN ENGINEERING SOFTWARE}, volume = {189}, unique-id = {34523794}, issn = {0965-9978}, abstract = {This paper, a multi-material topology optimization method (MMTO) is presented for two-dimensional structures using modified ordered solid isotropic material with penalization (SIMP) under multiple constraints such as mass, stiffness, frequency, and stress. The element density is obtained by a density filtering and the Heaviside approximation, which are combined to avoid gray elements and numerical issues of stress. Effective improvement of multiphase material topology optimization was performed including the criteria for stiffness, stress, and free vibration. P-norm stress aggregation is employed to calculate the maximum von Mises stress and sensitivity of von Mises stress is formulated by the adjoint method. The natural frequency and stress constraints are solved simultaneously to enhance the stability and reduce the stress concentration of the optimized structures, which are not much covered in the literature. The multi-mode phenomenon in the eigenfrequency problem is treated by the simply proposed technique. Results indicate that the multi-material designs with multi-constraints can be illustrated and optimized effectively. The optimized topologies, for stress minimization, indicate that the maximum stress can be significantly reduced compared with compliance minimization. The maximum von Mises stress of the topological results considering the maximum stiffness with natural frequency and mass constraints is higher than that maximum stiffness with only mass constraints, which indicates that the optimized structure created considering the eigenvalues is safer. The proposed approach can obtain a reasonable result that effectively controls the stress level and reduces the stress concentration at the high stress regions of multi-phase material structures with multi-constraints. Benchmark numerical examples are presented to confirm the effectiveness of the presented method. © 2024 Elsevier Ltd}, keywords = {Numerical methods; TOPOLOGY; Multi-objective optimization; composite materials; Natural frequencies; eigenvalues and eigenfunctions; STIFFNESS; Stress concentration; Multiobjective optimization; Shape optimization; Compliance constraints; Compliance constraints; Stress constraints; Stress constraints; Multiphase materials; Natural frequency; cost constraints; cost constraints; Lightweight; Lightweight; Topology optimisation; multi-material topology optimization; multi-material topology optimization; Multi-objectives optimization; Multi materials; Ordered interpolation; Ordered interpolation}, year = {2024}, eissn = {1873-5339} } @article{MTMT:34522673, title = {Optimal topologies considering fatigue with reliability constraint}, url = {https://m2.mtmt.hu/api/publication/34522673}, author = {Tauzowski, Piotr and Błachowski, Bartłomiej and Lógó, János}, doi = {10.1016/j.advengsoft.2023.103590}, journal-iso = {ADV ENG SOFTW}, journal = {ADVANCES IN ENGINEERING SOFTWARE}, volume = {189}, unique-id = {34522673}, issn = {0965-9978}, year = {2024}, eissn = {1873-5339}, orcid-numbers = {Lógó, János/0000-0003-0432-7193} } @article{MTMT:34670131, title = {Scatter search for capacitated minimum spanning tree}, url = {https://m2.mtmt.hu/api/publication/34670131}, author = {Rego, Cesar and Mathew, Frank}, doi = {10.1016/j.advengsoft.2023.103555}, journal-iso = {ADV ENG SOFTW}, journal = {ADVANCES IN ENGINEERING SOFTWARE}, volume = {186}, unique-id = {34670131}, issn = {0965-9978}, keywords = {Scatter search; Capacitated minimum spanning tree; Oscillating neighborhoods}, year = {2023}, eissn = {1873-5339} } @article{MTMT:34608933, title = {An adaptive B-spline representation of topology optimization design for Additive Manufacturing}, url = {https://m2.mtmt.hu/api/publication/34608933}, author = {Khan, Imran and Ullah, Baseer and Siraj-ul-Islam, Zahur and Ullah, Zahur and Khan, Wajid}, doi = {10.1016/j.advengsoft.2023.103552}, journal-iso = {ADV ENG SOFTW}, journal = {ADVANCES IN ENGINEERING SOFTWARE}, volume = {186}, unique-id = {34608933}, issn = {0965-9978}, abstract = {Topology optimization is a renowned structural optimization approach used to compute the optimal topol-ogy for the enhancement of structural performance. It has been in common practice in different engineering fields such as automobile and aerospace. However, there still exist gaps between topology optimization and its engineering operations, which considerably impedes topology optimization's applications. One of these gaps is how to make (especially finite element-based) topology optimization results machine-readable, which means, how to transform these into computer-aided design (CAD) models, which are ready-to-use models for manufacturing. In the proposed work the authors adopted a unique methodology that plugs the gap between topology optimization and manufacturing. This methodology seamlessly integrates the structural analysis tool, boundary description tool and standard CAD geometry representation; equipped with the Hausdorff distance approach for 3D printing/additive manufacturing of optimal structures. Initially, we extract the skeleton of the optimal design (in the form of a points cloud) using the level set method, followed by an interpolation technique with shape preservation property, the extracted skeleton is made dense. Incorporating the shape and curvature information of the data set, an adaptive B-spline approximation is devised for fitting a smooth curve through the points cloud. This approach interprets topology optimization results as a parametric CAD model with minimum possible control points and minimum approximation error. The CAD-based optimal designs are then used for additive manufacturing. The numerical results exhibit in detail the validity and accuracy of the proposed method.}, keywords = {Standard deviation; B-spline; CAM; Topology optimization; Additive manufacturing; Element free Galerkin method; Shape index; Hausdorff error}, year = {2023}, eissn = {1873-5339} } @article{MTMT:34573190, title = {Performances analysis of parallel asynchronous and synchronous algorithms on cloud architecture for PDE}, url = {https://m2.mtmt.hu/api/publication/34573190}, author = {Rahhali, M. A. and Garcia, T. and Spiteri, P.}, doi = {10.1016/j.advengsoft.2023.103550}, journal-iso = {ADV ENG SOFTW}, journal = {ADVANCES IN ENGINEERING SOFTWARE}, volume = {186}, unique-id = {34573190}, issn = {0965-9978}, abstract = {In order to solve discretized stationary linear or non linear diffusion and convection-diffusion problems, the present paper deals with a comparison between the performances of parallel iterative synchronous or asynchronous algorithms implemented on a Cloud computing architecture with several sizes of the algebraic systems to be solved. The parallel algorithms are briefly and intuitively presented and analysis of their behavior is recalled. In particular, criteria of convergence are recalled and estimates of convergence speed are given. Implementation on cloud architectures are briefly described. Finally, for each kind of problem, the performance of the target algorithms on cloud architectures are analyzed.}, keywords = {COMMUNICATION; convergence; Parallel computing; TERMINATION; Cloud computing; High performance computing; CRITERION; Computer Science, Interdisciplinary Applications; Computer Science, Software Engineering; asynchronous iterations; Asynchronous algorithms}, year = {2023}, eissn = {1873-5339} }