Review of Analysis Model on Three-Dimensional Braided Composites

2014 ◽  
Vol 607 ◽  
pp. 881-885
Author(s):  
Hai Yan Chen ◽  
Gao Feng Wei ◽  
Yan Xu
Keyword(s):  
Numerical Model ◽  
Mechanical Performance ◽  
Three Dimensional ◽  
Single Step ◽  
Analysis Model ◽  
Micro Structure ◽  
Braided Composites ◽  
Reinforced Fiber

Because reinforced-fiber has characteristic of single step forming in three-dimensional braided composites, analysis of mechanical performance is very different from laminates. This paper proceeds from the micro-structure of 3-D braided composites, some review and research are presented detailedly, and the several model’s merit and demerit are analyzed, which can conduct dynamicists to choose reasonable numerical model. The mechanical performance can be predicted accurately, and the next research can be guided using above analysis.

scholarly journals Three-Dimensional Printing of Proteinaceous Structures by Aqueous Solvent-Directed Molecular Assembly

2019 ◽  
Author(s):  
Xuan Mu ◽  
Yu Wang ◽  
Chengchen Guo ◽  
Yamin Li ◽  
Shengjie Ling ◽  
...  
Keyword(s):  
3D Printing ◽  
Mechanical Performance ◽  
De Novo ◽  
Three Dimensional ◽  
Small Diameter ◽  
Molecular Assembly ◽  
Single Step ◽  
Ambient Conditions ◽  
Aqueous Solvent ◽  
Functional Components

<p>Hierarchical molecular assembly directed by cell-regulated aqueous solvent is a fundamental strategy for manufacturing various proteinaceous structures that are of intense interest for nanotechnology, sustainable manufacturing and regenerative medicine. However, to translate the natural strategy into advanced digital manufacturing like three-dimensional (3D) printing remains a tremendous technical and theoretical challenge. This work presents a 3D printing technique of a particular protein, silk fibroin, by rationally designing an<i> de novo </i>aqueous salt bath capable of directing the hierarchical assembly of the protein molecules. This technique, conducted under aqueous and ambient conditions, results in 3D proteinaceous architectures characterized by intrinsic biocompatibility/biodegradability and remarkable mechanical performance. The versatility of this method is shown in a diversity of 3D shapes and a range of functional components integrated into the 3D prints. Exceptional manufacturing capability and one promising application is exemplified by the single-step construction of perfusable microfluidic chips, also an analogy of small-diameter vascular grafts, which eliminates the use of supporting or sacrificial materials owing to optimized crosslinking dynamics and compartmentalized printing parameters. The 3D shaping capability of the protein material can benefit a multitude of biomedical devices, from drug delivery to surgical implants to tissue scaffolds.</p>

Prediction for Strength of 3D Braided Composites Based on Helix Geometry Model

2013 ◽  
Vol 387 ◽  
pp. 64-67
Author(s):  
Li Li Jiang ◽  
Xi Bin Wei ◽  
Xun Liu ◽  
Tao Zeng
Keyword(s):  
Numerical Model ◽  
Cross Section ◽  
Present Model ◽  
Experimental Results ◽  
Micro Structure ◽  
Braided Composites ◽  
Geometry Model ◽  
3D Braided Composites ◽  
Braiding Angle ◽  
Helix Geometry

A numerical model capable of calculating the strength of 3D braided composites is developed, based on the micro-structure of 3D four-directional braided composites and the assumption of the braiding yarn with a helix configuration and ellipse cross-section. The strength of 3D braided composites have been predicted through a finite multiphase element method (FMEM). Comparison was conducted for those from the present model and experiment. The results are in good agreements with the experimental results in the previous literature. The influences of braiding angle on the strength are also studied.

scholarly journals Three-Dimensional Printing of Proteinaceous Structures by Aqueous Solvent-Directed Molecular Assembly

2019 ◽  
Author(s):  
Xuan Mu ◽  
Yu Wang ◽  
Chengchen Guo ◽  
Yamin Li ◽  
Shengjie Ling ◽  
...  
Keyword(s):  
3D Printing ◽  
Mechanical Performance ◽  
De Novo ◽  
Three Dimensional ◽  
Small Diameter ◽  
Molecular Assembly ◽  
Single Step ◽  
Ambient Conditions ◽  
Aqueous Solvent ◽  
Functional Components

<p>Hierarchical molecular assembly directed by cell-regulated aqueous solvent is a fundamental strategy for manufacturing various proteinaceous structures that are of intense interest for nanotechnology, sustainable manufacturing and regenerative medicine. However, to translate the natural strategy into advanced digital manufacturing like three-dimensional (3D) printing remains a tremendous technical and theoretical challenge. This work presents a 3D printing technique of a particular protein, silk fibroin, by rationally designing an<i> de novo </i>aqueous salt bath capable of directing the hierarchical assembly of the protein molecules. This technique, conducted under aqueous and ambient conditions, results in 3D proteinaceous architectures characterized by intrinsic biocompatibility/biodegradability and remarkable mechanical performance. The versatility of this method is shown in a diversity of 3D shapes and a range of functional components integrated into the 3D prints. Exceptional manufacturing capability and one promising application is exemplified by the single-step construction of perfusable microfluidic chips, also an analogy of small-diameter vascular grafts, which eliminates the use of supporting or sacrificial materials owing to optimized crosslinking dynamics and compartmentalized printing parameters. The 3D shaping capability of the protein material can benefit a multitude of biomedical devices, from drug delivery to surgical implants to tissue scaffolds.</p>

Numerical investigation on the effect of tow tension on the geometry of three-dimensional orthogonally woven fabric

2018 ◽  
Vol 89 (18) ◽  
pp. 3779-3791 ◽  
Author(s):  
Zhiping Ying ◽  
Xudong Hu ◽  
Xiaoying Cheng ◽  
Zhenyu Wu
Keyword(s):  
Numerical Model ◽  
Numerical Investigation ◽  
Cross Section ◽  
Mechanical Performance ◽  
Three Dimensional ◽  
Transverse Force ◽  
Woven Fabric ◽  
Textile Composite ◽  
A Chain ◽  
Good Agreement

The fabric geometry determines the mechanical performance of a textile composite. This paper investigates the effect of tow tension on the fabric geometry during the weaving process. A numerical model at the fiber scale was established by representing the fiber as a chain of truss elements connected by fully flexible hinges and having strong tensile modules. Fabric samples were woven on a homemade loom under different tension configurations to verify the numerical model. The model results with respect to the tow cross-section and path are in good agreement with observations of the homemade fabric sample. The tow cross-section deformation is the consequence of fiber rearrangement due to the transverse force originating from Z-binder tension. It is also found that the crimps of weft tows are different to those of warp tows. For weft tows, appreciable crimping is found in the regions of intercrossing with the Z-binder tow. Meanwhile, fibers undulate at the edges and remain straight in the middle of warp tows.

High temperature compressive behavior of three-dimensional five-directional braided composites

2018 ◽  
Vol 60 (7-8) ◽  
pp. 772-776 ◽  
Author(s):  
Jiayi Liu ◽  
Junmeng Zhou ◽  
Yu Wang ◽  
Jie Mei ◽  
Jialin Liu
Keyword(s):  
High Temperature ◽  
Three Dimensional ◽  
Compressive Behavior ◽  
Braided Composites

A THREE-DIMENSIONAL NUMERICAL MODEL FOR SELECTIVE WITHDRAWAL IN COASTAL AREA

2018 ◽  
Vol 74 (5) ◽  
pp. I_571-I_576
Author(s):  
Yasuo NIIDA ◽  
Norikazu NAKASHIKI ◽  
Takaki TSUBONO ◽  
Shin’ichi SAKAI ◽  
Teruhisa OKADA
Keyword(s):  
Numerical Model ◽  
Coastal Area ◽  
Three Dimensional ◽  
Selective Withdrawal

scholarly journals Blowing and drifting snow in Alpine terrain: numerical simulation and related field measurements

1998 ◽  
Vol 26 ◽  
pp. 174-178 ◽  
Author(s):  
Peter Gauer
Keyword(s):  
Numerical Simulation ◽  
Numerical Model ◽  
Three Dimensional ◽  
Field Measurements ◽  
Blowing Snow ◽  
Related Field ◽  
Drifting Snow ◽  
Physically Based ◽  
Snow Transport

A physically based numerical model of drifting and blowing snow in three-dimensional terrain is developed. The model includes snow transport by saltation and suspension. As an example, a numerical simulation for an Alpine ridge is presented and compared with field measurements.

Modeling and experimental verification on directivity of an electret cell array loudspeaker

2012 ◽  
Vol 24 (3) ◽  
pp. 326-333 ◽  
Author(s):  
Yu-Chi Chen ◽  
Wen-Ching Ko ◽  
Han-Lung Chen ◽  
Hsu-Ching Liao ◽  
Wen-Jong Wu ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Three Dimensional ◽  
Digital Control System ◽  
Analysis Model ◽  
Cell Array ◽  
Element Analysis ◽  
Finite Element Analysis Model ◽  
The Finite Element Analysis ◽  
Directivity Characteristics

We propose a model to give us a method to investigate the characteristic three-dimensional directivity in an arbitrarily configured flexible electret-based loudspeaker. In recent years, novel electret loudspeakers have attracted much interest due to their being lightweight, paper thin, and possessing excellent mid- to high-frequency responses. Increasing or decreasing the directivity of an electret loudspeaker makes it excellent for adoption to many applications, especially for directing sound to a particular area or specific audio location. Herein, we detail a novel electret loudspeaker that possesses various directivities and is based on various structures of spacers instead of having to use multichannel amplifiers and a complicated digital control system. In order to study the directivity of an electret loudspeaker based on an array structure which can be adopted for various applications, the horizontal and vertical polar directivity characteristics as a function of frequency were simulated by a finite-element analysis model. To validate the finite-element analysis model, the beam pattern of the electret loudspeaker was measured in an anechoic room. Both the simulated and experimental results are detailed in this article to validate the various assertions related to the directivity of electret cell-based smart speakers.

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