Two-belt continuous line bucket system: Its concept design and fundamental bucket motion experiments

The patterning of electrospun fibers is a key technology applicable to various fields. This study reports a novel focused patterning method for electrospun nanofibers that uses a cylindrical dielectric guide. The finite elements method (FEM) was used to analyze the electric field focusing phenomenon and ground its explanation in established theory. The horizontal and vertical electric field strengths in the simulation are shown to be key factors in determining the spatial distribution of nanofibers. The experimental results demonstrate a relationship between the size of the cylindrical dielectric guide and that of the electrospun area accumulated in the collector. By concentrating the electric field, we were able to fabricate a pattern of less than 6 mm. The demonstration of continuous line and square patterning shows that the electrospun area can be well controlled. This novel patterning method can be used in a variety of applications, such as sensors, biomedical devices, batteries, and composites.

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A modular design method based on TRIZ and AD and its application to cutter changing robot

Advances in Mechanical Engineering ◽

10.1177/16878140211034369 ◽

2021 ◽

Vol 13 (7) ◽

pp. 168781402110343

Author(s):

Mei Yang ◽

Yimin Xia ◽

Lianhui Jia ◽

Dujuan Wang ◽

Zhiyong Ji

Keyword(s):

Modular Design ◽

Design Method ◽

Idea Generation ◽

Design Parameters ◽

Problem Analysis ◽

Concept Design ◽

Functional Requirements ◽

Shield Tunneling ◽

Structural Hierarchy ◽

And Performance

Modular design, Axiomatic design (AD) and Theory of inventive problem solving (TRIZ) have been increasingly popularized in concept design of modern mechanical product. Each method has their own advantages and drawbacks. The benefit of modular design is reducing the product design period, and AD has the capability of problem analysis, while TRIZ’s expertise is innovative idea generation. According to the complementarity of these three approaches, an innovative and systematic methodology is proposed to design big complex mechanical system. Firstly, the module partition is executed based on scenario decomposition. Then, the behavior attributes of modules are listed to find the design contradiction, including motion form, spatial constraints, and performance requirements. TRIZ tools are employed to deal with the contradictions between behavior attributes. The decomposition and mapping of functional requirements and design parameters are carried out to construct the structural hierarchy of each module. Then, modules are integrated considering the connections between each other. Finally, the operation steps in application scenario are designed in temporal and spatial dimensions. Design of cutter changing robot for shield tunneling machine is taken as an example to validate the feasibility and effectiveness of the proposed method.

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Sustainable concept design including economic, environment and inherent safety criteria: Process intensification-reactive pressure swing distillation

Journal of Cleaner Production ◽

10.1016/j.jclepro.2021.127852 ◽

2021 ◽

pp. 127852

Author(s):

Jiaxing Zhu ◽

Lin Hao ◽

Hongyuan Wei

Keyword(s):

Process Intensification ◽

Economic Environment ◽

Inherent Safety ◽

Concept Design ◽

Pressure Swing ◽

Pressure Swing Distillation

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Analysis Concept Design of Corn Raw Materials Suppliers in the Animal Feed Industry using Analytical Hierarchy Process (AHP) Method

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/1003/1/012159 ◽

2020 ◽

Vol 1003 ◽

pp. 012159

Author(s):

Monica ◽

A C Sembiring

Keyword(s):

Analytical Hierarchy Process ◽

Animal Feed ◽

Raw Materials ◽

Concept Design ◽

Ahp Method ◽

Feed Industry ◽

Hierarchy Process ◽

Analysis Concept

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Methodology for the Concept Design of Locally Reinforced Composites

Applied Sciences ◽

10.3390/app11167246 ◽

2021 ◽

Vol 11 (16) ◽

pp. 7246

Author(s):

Julius Moritz Berges ◽

Georg Jacobs ◽

Sebastian Stein ◽

Jonathan Sprehe

Keyword(s):

Cost Estimation ◽

Structural Design ◽

Early Stage ◽

Parameter Study ◽

Great Effort ◽

Concept Design ◽

Cost Weight ◽

Reinforced Plastics ◽

Fiber Reinforced Plastics ◽

The Cost

Locally load-optimized fiber-based composites, the so-called tailored textiles (TT), offer the potential to reduce weight and cost compared to conventional fiber-reinforced plastics (FRP). However, the design of TT has a higher complexity compared to FRP. Current approaches, focusing on solving this complexity for multiple objectives (cost, weight, stiffness), require great effort and calculation time, which makes them unsuitable for serial applications. Therefore, in this paper, an approach for the efficient creation of simplified TT concept designs is presented. By combining simplified models for structural design and cost estimation, the most promising concepts, regarding the cost, weight, and stiffness of TT parts, can be identified. By performing a parameter study, the cost, weight, and stiffness optima of a sample part compared to a conventional FRP component can be determined. The cost and weight were reduced by 30% for the same stiffness. Applying this approach at an early stage of product development reduces the initial complexity of the subsequent detailed engineering design, e.g., by applying methods from the state of the art.

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