A Novel Design Framework for Structures/Materials with Enhanced Mechanical Performances

Published on Mar 19, 2018
· DOI :10.20944/PREPRINTS201803.0163.V1
Jie Liu12
Estimated H-index: 12
Xiaonan Fan2
Estimated H-index: 2
+ 3 AuthorsGang Zhao3
Estimated H-index: 3
#1Anikó Csébfalvi (PTE: University of Pécs)H-Index: 6
#2János Lógó (BME: Budapest University of Technology and Economics)H-Index: 11
Abstract Uncertainty is an important consideration in topology optimization to produce robust and reliable solutions. There are several possibilities to take into account the uncertainty in the topology optimization of continuum structures. In this paper, we assume that the only source of uncertainty is the variability of the applied load directions. Most models in this area apply parametric statistical tools to describe the directional uncertainty of the applied loads to produce robust structur...
7 CitationsSource
#1Adhi Anindyajati (USYD: University of Sydney)H-Index: 3
#2Philip Boughton (USYD: University of Sydney)H-Index: 12
Last. Andrew J. Ruys (USYD: University of Sydney)H-Index: 23
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Electrospun fibres have gained broad interest in biomedical applications, including tissue engineering scaffolds, due to their potential in mimicking extracellular matrix and producing structures favourable for cell and tissue growth. The development of scaffolds often involves multivariate production parameters and multiple output characteristics to define product quality. In this study on electrospinning of polycaprolactone (PCL), response surface methodology (RSM) was applied to investigate t...
11 CitationsSource
#1Joanne Ee Mei Teoh (NTU: Nanyang Technological University)H-Index: 5
#2Jia An (NTU: Nanyang Technological University)H-Index: 25
Last. Yong Liu (NTU: Nanyang Technological University)H-Index: 86
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In 4D printing research, different types of complex structure folding and unfolding have been investigated. However, research on cross-folding of origami structures (defined as a folding structure with at least two overlapping folds) has not been reported. This research focuses on the investigation of cross-folding structures using multi-material components along different axes and different horizontal hinge thickness with single homogeneous material. Tensile tests were conducted to determine th...
24 CitationsSource
#1Lei Wang (Beihang University)H-Index: 14
#2Liu Dongliang (Beihang University)H-Index: 4
Last. Zhiping Qiu (Beihang University)H-Index: 32
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Abstract A new non-probabilistic reliability-based topology optimization (NRBTO) method for detailed design of continuum structures is proposed in this paper, in which the unknown but bounded (UBB) uncertainties existing in material and external loads are considered simultaneously. Based on the interval set-theoretic model, traditional displacement constraint is transformed into the non-probabilistic reliability format, in which a novel measuring index, namely, the optimization feature distance ...
75 CitationsSource
#1Lise Noël (University of Liège)H-Index: 5
#2Pierre Duysinx (University of Liège)H-Index: 21
The present paper investigates the tailoring of bimaterial microstructures minimizing their local stress field exploiting shape optimization. The problem formulation relies on the extended finite element method (XFEM) combined with a level set representation of the geometry, to deal with complex microstructures and handle large shape modifications while working on fixed meshes. The homogenization theory, allowing extracting the behavior of periodic materials built from the repetition of a repres...
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Additive manufacturing or 3D printing is a rapidly developing technology that has revolutionized the manufacturing sector. In this paper, a review of various manufacturing methods is presented and selected features are compared. Some examples requiring features on the micron-scale are presented.
120 CitationsSource
#1Jihong Zhu (NPU: Northwestern Polytechnical University)H-Index: 23
#2Weihong Zhang (NPU: Northwestern Polytechnical University)H-Index: 61
Last. Liang Xia (NPU: Northwestern Polytechnical University)H-Index: 22
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Topology optimization has become an effective tool for least-weight and performance design, especially in aeronautics and aerospace engineering. The purpose of this paper is to survey recent advances of topology optimization techniques applied in aircraft and aerospace structures design. This paper firstly reviews several existing applications: (1) standard material layout design for airframe structures, (2) layout design of stiffener ribs for aircraft panels, (3) multi-component layout design f...
346 CitationsSource
#1Alok Sutradhar (OSU: Ohio State University)H-Index: 15
#2Jaejong Park (OSU: Ohio State University)H-Index: 6
Last. Glaucio H. Paulino (Georgia Institute of Technology)H-Index: 78
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Large craniofacial defects require efficient bone replacements which should not only provide good aesthetics but also possess stable structural function. The proposed work uses a novel multiresolution topology optimization method to achieve the task. Using a compliance minimization objective, patient-specific bone replacement shapes can be designed for different clinical cases that ensure revival of efficient load transfer mechanisms in the mid-face. In this work, four clinical cases are introdu...
63 CitationsSource
Advanced manufacturing processes provide a tremendous opportunity to fabricate materials with precisely defined architectures. To fully leverage these capabilities, however, materials architectures must be optimally designed according to the target application, base material used, and specifics of the fabrication process. Computational topology optimization offers a systematic, mathematically driven framework for navigating this new design challenge. The design problem is posed and solved formal...
117 CitationsSource
#1Yang Yang (HKU: University of Hong Kong)H-Index: 12
#2Yonghua Chen (HKU: University of Hong Kong)H-Index: 24
Last. Yingtian Li (HKU: University of Hong Kong)H-Index: 11
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This article presents a novel method of shape memory polymer (SMP) processing for additive manufacturing, in particular, fused-deposition modeling (FDM). Critical extrusion process parameters have been experimented to determine an appropriate set of parameter values so that good-quality SMP filament could be made for FDM. In the FDM process, effects of different printing parameters such as extruder temperature and scanning speed on object printing quality are also studied. In all the process stu...
152 CitationsSource
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