Journal ArticleDOI
Topology optimization of lightweight structures with application to bone scaffolds and 3d printed shoes for diabetics
TLDR
In this paper , an automatic complex topology lightweight structure generation method (ACTLSGM) is presented to automatically generate 3D models of lightweight truss structures with a boundary surface of any shape.Abstract:
An automatic complex topology lightweight structure generation method (ACTLSGM) is presented to automatically generate 3D models of lightweight truss structures with a boundary surface of any shape. The core idea of the ACTLSGM is to use the PIMesh, a mesh generation algorithm developed by the authors, to generate node distributions inside the object representing the boundary surface of the target complex topology structures; raw lightweight truss structures are then generated based on the node distributions; the resulting lightweight truss structure is then created by adjusting the radius of the raw truss structures using an optimization algorithm based on finite element truss analysis. The finite element analysis-based optimization algorithm can ensure the resulting structures satisfy the design requirements on stress distributions or stiffness. Three demos, including a lightweight structure for a cantilever beam, a femur bone scaffold, and a 3D shoe sole model with adaptive stiffness that can be used to adjust foot pressure distributions for patients with diabetic foot problems, are generated to demonstrate the performance of the ACTLSGM. The ACTLSGM is not limited to generating 3D models of medical devices, but can be applied in many other fields, including 3D printing infills and other fields where customized lightweight structures are required.read more
Citations
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Design for Additive Manufacturing: Recent Innovations and Future Directions
TL;DR: In this paper , a review of additive manufacturing research is presented in the context of Fabrication, Generation, and Assessment phases that bridge the gap between additive manufacturing capabilities and design innovations, including materials, processes, and constraints for building systems with specified properties and functions.
Journal ArticleDOI
Parametric topology optimization approach for sustainable development of customized orthotic appliances using additive manufacturing
Ashwani Kumar,Deepak Chhabra +1 more
TL;DR: In this article , a hybrid approach was used to solve the physics of a mallet trauma, transforming existing geometry into an efficacious splint design capable of delivering improved recovery outcomes.
Journal ArticleDOI
Tailoring the Microarchitectures of 3D Printed Bone-like Scaffolds for Tissue Engineering Applications
E. L. De Zenobi,Miriam Merco,Federico Mochi,J. Ruspi,Raffaella Pecci,Rodolfo Marchese,Annalisa Convertino,Antonella Lisi,Costantino Del Gaudio,Mario Ledda +9 more
TL;DR: In this paper, polylactic acid scaffolds were printed resembling trabecular bone microarchitecture in order to deal with morphologically biomimetic features to potentially enhance the biological outcome.
References
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Journal ArticleDOI
A simple evolutionary procedure for structural optimization
Yi Min Xie,Grant P. Steven +1 more
TL;DR: In this paper, a simple evolutionary procedure is proposed for shape and layout optimization of structures, where low stressed material is progressively eliminated from the structure during the evolution process, and various examples are presented to illustrate the optimum structural shapes and layouts achieved by this procedure.
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Topology optimization approaches: A comparative review
Ole Sigmund,Kurt Maute +1 more
TL;DR: An overview, comparison and critical review of the different approaches to topology optimization, their strengths, weaknesses, similarities and dissimilarities and suggests guidelines for future research.
Journal ArticleDOI
Topology Optimization in Aircraft and Aerospace Structures Design
TL;DR: In this article, a survey of recent advances of topology optimization techniques applied in aircraft and aerospace structures design is presented, including standard material layout for airframe structures, layout design of stiffener ribs for aircraft panels, multi-component layout design for aerospace structural systems, and multi-fasteners design for assembled aircraft structures.
Journal ArticleDOI
Design and properties of 3D scaffolds for bone tissue engineering.
TL;DR: The entire novel process that can be followed to design graded porous implants, whatever its external shape and geometry, but internally tuned to the exact histomorphometric indices needed to match natural human tissues microstructures and, consequently, their mechanical and fluid properties, among others are shown.
Journal ArticleDOI
Build-to-last: strength to weight 3D printed objects
Lin Lu,Andrei Sharf,Haisen Zhao,Wei Yuan,Qingnan Fan,Xuelin Chen,Yann Savoye,Changhe Tu,Daniel Cohen-Or,Baoquan Chen +9 more
TL;DR: This paper introduces a hollowing optimization algorithm based on the concept of honeycomb-cells structure to reduce the material cost and weight of a given object while providing a durable printed model that is resistant to impact and external forces.