Searched for: +
(1 - 12 of 12)
document
Zhai, X. (author), Wang, Weiming (author), Chen, Falai (author), Wu, J. (author)
Recent years have seen a growing interest in topology optimization of functionally graded microstructures, characterized by an array of microstructures with varying volume fractions. However, microstructures optimized at slightly different volume fractions do not necessarily connect well when placed adjacently. Furthermore, optimization is...
journal article 2024
document
Wang, Junpeng (author), Westermann, Rüdiger (author), Wu, J. (author)
We present a novel dehomogenization approach for the efficient design of high-resolution load-bearing structures. The proposed approach builds upon a streamline-based parametrization of the design domain, using a set of space-filling and evenly spaced streamlines in the two mutually orthogonal direction fields that are obtained from...
journal article 2023
document
Wang, W. (author), van Keulen, A. (author), Wu, J. (author)
Additive manufacturing of metal parts involves phase transformations and high temperature gradients which lead to uneven thermal expansion and contraction, and, consequently, distortion of the fabricated components. The distortion has a great influence on the structural performance and dimensional accuracy, e.g., for assembly. It is therefore...
journal article 2023
document
Garner, E. (author), Wu, J. (author), Zadpoor, A.A. (author)
Recent advances in 3D printable micro-architected materials offer unprecedented possibilities for the development of highly tailored orthopaedic implants. These devices, which are typically made from fully solid materials, significantly alter load transmission to the surrounding bone tissue, potentially leading to interface instability and bone...
journal article 2022
document
Wang, Junpeng (author), Wu, J. (author), Westermann, Rüdiger (author)
The optimization of porous infill structures via local volume constraints has become a popular approach in topology optimization. In some design settings, however, the iterative optimization process converges only slowly, or not at all even after several hundreds or thousands of iterations. This leads to regions in which a distinct binary...
journal article 2022
document
Loos, Shannon (author), Wolk, Sytze van der (author), Graaf, Nina de (author), Hekkert, P.P.M. (author), Wu, J. (author)
Topology optimization is increasingly applied to design consumer products, for which aesthetics plays an important role to consumer acceptance. In industrial design, it is known that preferences or taste judgement obey certain rules or principles. These principles are not directly quantifiable, but can qualitatively predict and explain...
journal article 2022
document
Wu, J. (author), Sigmund, Ole (author), Groen, Jeroen P. (author)
Multi-scale structures, as found in nature (e.g., bone and bamboo), hold the promise of achieving superior performance while being intrinsically lightweight, robust, and multi-functional. Recent years have seen a rapid development in topology optimization approaches for designing multi-scale structures, but the field actually dates back to...
review 2021
document
Zhai, X. (author), Chen, Falai (author), Wu, J. (author)
Handling stress constraints is an important topic in topology optimization. In this paper, we introduce an interpretation of stresses as optimization variables, leading to an augmented Lagrangian formulation. This formulation takes two sets of optimization variables, i.e., an auxiliary stress variable per element, in addition to a density...
journal article 2021
document
Wang, W. (author), Munro, D.P. (author), Wang, C.C. (author), van Keulen, A. (author), Wu, J. (author)
The design of optimal structures and the planning of (additive manufacturing) fabrication sequences have been considered typically as two separate tasks that are performed consecutively. In the light of recent advances in robot-assisted (wire-arc) additive manufacturing which enable addition of material along curved surfaces, we present a...
journal article 2019
document
Groen, J.P. (author), Wu, J. (author), Sigmund, Ole (author)
This paper concerns compliance minimization and projection of coated structures with orthotropic infill material in 2D. The purpose of the work is two-fold. First, we introduce an efficient homogenization-based approach to perform topology optimization of coated structures with orthotropic infill material. The design space is relaxed to allow...
journal article 2019
document
Xia, Y. (author), Wu, Yue (author), Hendriks, M.A.N. (author)
In current optimization methods for free-form shells, the shape and topology are usually optimized separately. These methods are based on the assumption that the shape and topology of a shell influence each other only slightly, but this is not always correct. Moreover, different parameterization models are used in the shape optimization and...
journal article 2019
document
Wu, J. (author), Clausen, Anders (author), Sigmund, Ole (author)
Additively manufactured parts are often composed of two sub-structures, a solid shell forming their exterior and a porous infill occupying the interior. To account for this feature this paper presents a novel method for generating simultaneously optimized shell and infill in the context of minimum compliance topology optimization. Our method...
journal article 2017
Searched for: +
(1 - 12 of 12)