Publicacións

@article{villalba_multipatch_2025,

title = {Multipatch IGA for stress-constrained minimum weight structural topology optimization},

author = {Diego Villalba and José París-López and Iván Couceiro-Aguiar and Fermín Navarrina-Martínez},

url = {https://doi.org/10.1080/0305215X.2024.2436994},

doi = {10.1080/0305215X.2024.2436994},

issn = {0305-215X},

year  = {2025},

date = {2025-11-01},

urldate = {2025-11-01},

journal = {Engineering Optimization},

volume = {57},

number = {11},

pages = {3401–3424},

publisher = {Taylor & Francis},

abstract = {In this article, an isogeometric analysis (IGA) formulation with various patches (multipatch approach) is proposed to solve the structural topology optimization (STO) problem. The multipatch formulation enables the solution of STO problems with geometries not equivalent to rectangles by using IGA. For this purpose, a minimum weight with stress constraints (MWSC) problem is stated. A quadratic B-splines basis defined for each patch is used to model the material distribution. The structural analysis is computed with IGA. The introduction of all of the stress constraints in the formulation of the problem is made with an overweight constraint (OC). Finally, the multipatch approach is validated with the solution of some benchmark problems.},

note = {_eprint: https://doi.org/10.1080/0305215X.2024.2436994},

keywords = {isogeometric analysi, multipatch approach, overweight approach, stress constraints, Structural topology optimization},

pubstate = {published},

tppubtype = {article}

}

@article{villalba_isogeometric_2024,

title = {Isogeometric topology optimization of structures using the overweight approach},

author = {Diego Villalba and José París-López and Iván Couceiro-Aguiar and Fermín Navarrina-Martínez},

url = {https://doi.org/10.1007/s00158-024-03782-2},

doi = {10.1007/s00158-024-03782-2},

issn = {1615-1488},

year  = {2024},

date = {2024-05-01},

urldate = {2024-05-01},

journal = {Structural and Multidisciplinary Optimization},

volume = {67},

number = {5},

pages = {84},

abstract = {In this paper, a 2D isogeometric formulation of the material distribution for structural topology optimization considering minimum weight and local stress constraints using the overweight approach is proposed. The aim of this isogeometric formulation is to provide solutions with high spatial definition using a lower number of design variables in comparison with the formulations previously developed to define the material layout. Despite of this, an important number of local stress constraints has to be considered in the solution of the problem. For this purpose, an Overweight Constraint is used to consider all of them. The structural analysis is performed by means of the Isogeometric Analysis (IGA) and the distribution of material is modeled by means of quadratic B-splines. Moreover, the optimization is addressed by means of the Sequential Linear Programming algorithm (SLP) that is driven by the information provided by a full first-order sensitivity analysis extension of the IGA formulation. Finally, the proposed formulation is tested by means of some benchmark problems, and the results show that the isogeometric formulation provides solutions with high spatial definition. A comparison with a Finite Element Method (FEM) topology optimization formulation is included.},

keywords = {Aggregation techniques, Isogeometric analysis, overweight approach, stress constraints, Structural topology optimization},

pubstate = {published},

tppubtype = {article}

}