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Online since: March 2024
Authors: Andrea Avanzini, Gabriele Baronio, Alberto Signoroni
In [18] experimental and finite element tests on the material properties of a customized wrist orthosis produced with 3D printing were combined.
In this way the computational model provides with the possibility to assign different material properties to bones, joints and soft tissue, while accounting for the exact contact surface.
Literature models often treat the hand as an entire solid, assigning average mechanical properties and with linear elastic laws, not to overload the calculation burden because hyperelasticity can induce longer computational times [22,30].
The values of these material parameters were the same as in [32] and, following [31], the hand was assumed as a homogeneous body assigning the same properties to the remaining soft tissue volume.
In this way, different properties could be assigned to soft tissues and bones, but no contact interactions were needed at this internal interface.
Online since: January 2019
Authors: Daniel Szabó, Martina Jurigová, Ivan Chmúrny
This document deals with the determination of thermal transmission properties of wood-aluminium window with vacuum glazing.
In 2016, during the Coneco and Racioenergia fairs in Incheba Bratislava, wood-aluminium window manufacturer "Mintal Energy VG" was awarded Gold Plaque 2016 for the application of vacuum glazing, for their excellent thermal insulation and acoustic properties (Fig. 1).
These properties were stated by the manufacturer based on the calculation in Window 7 by Canadian Standard NFRC 100-2010.
The linear transmittance,Yg, is mainly affected by the conductivity of the spacer material.
The Ug value corresponds with the heat flow in the middle of the glazing without affecting of the support pillars.
Online since: September 2020
Authors: Khairel Rafezi Ahmad, Khairul Nizar Ismail, Norlia Mohamad Ibrahim, Roshazita Che Amat
Image scanning for binder properties was using cutting samples of prism.
Addition of metakaolin in mix can have a strong effect on fresh and hardened state properties.
Bottom ash concrete properties were improved by addition of metakoalin.
,The Properties of Fresh Concrete, J.
[11] Cheng, An., Effect of Incinerator Bottom Ash Properties on Mechanical and Pore Size of Blended Cement Mortars, Materials and Design. 36 (2012) 859
Online since: June 2008
Authors: Shan Tung Tu
The properties of HAZ would not be much affected by the weld repair and are assumed to be the same as before.
The life can be extended by a factor of 1.84 at a small cost of weld repair.
The material properties of HAZ may govern the life of the weldments.
The properties of the constituent materials of the weldment at 640 oC are taken from the previous literature[9, 10].
It is thus suggested that the attention should be paid to the improvement of HAZ properties in the repair weld [11].
Online since: June 2020
Authors: Abdul Rahim Bahari, Mohd Azmi Yunus, Muhamad Norhisham Abdul Rani, Wan Imaan Izhan Wan Iskandar Mirza, Mohd Azam Shah Aziz Shah
Several factors that influence the simulation include train speed, subgrade stiffness and irregularity angles of track transition as well as the transition pattern.
The mass, spring and damper elements represent the masses, stiffness properties and damping properties of hard and soft tissues.
The modal properties are formulated to derive the physical parameters of the model.
Table 1 shows the properties of the rectangular plate used in the experimental modal analysis.
The properties of the spring is listed in Table 2.
Online since: January 2012
Authors: Feng Wen Zhao, Yong Liu, Yu Mei Ding, Hua Yan, Peng Cheng Xie, Wei Min Yang
Cao electrospun PLA superfine fibers from solution and characterized the mechanical properties of the fibers [2].
The solution electrospun superfine fibers, which have holes in the surface, exhibit low mechanical property compare with melt electrospun fibers.
The low mechanical property limits their utility in some applications.
So many people study the melt electrospinning to get PLA fibers of high mechanical property.
Yang, Orthogonal design study on factors effecting on fibers diameter of melt electrospinning, J.
Online since: May 2016
Authors: Lai Xiao Lu, Zhao Ju Zhu, Jie Sun
Research on the Influence of Tool Wear on Cutting Performance in High-Speed Milling of Difficult-to-Cut Materials Zhaoju Zhu1,a , Jie Sun1,b,* ,Laixiao Lu1,c 1Ministry of Education Key Laboratory of Efficient and Clean Machinery Manufacturing, School of Mechanical Engineering, Shandong University, Jinan250061,China azhuzhaoju0216@163.com, bsunjie@sdu.edu.cn, clulaixiao@163.com Keywords: high-speed milling; difficult-to-cut materials; tool wear; cutting performance Abstract.
Introduction In recent years, with the rapid development of the aerospace, aviation, automotive, military, instrumentation, communications engineering, electronic industry and machinery manufacturing industries, the using of new materials became more and more, and these materials were high mechanical properties, chemical stability, resistance to high temperature and high pressure, can be adapted to a variety of special working environment, they become an important factor to promote technology development in these areas.
Its own characteristics determines difficult machining[5~7], mainly displays in: (1) low thermal conductivity, high cutting temperature, thereby seriously affecting the knives' service life and processing surface quality integrity; (2) the modulus of elasticity is small, the spring-back phenomenon is serious, led to increasing tool wear, cause and aggravate cutting chatter; (3) high chemical activity, tool life is short; (4) small deformation coefficient, the unit cutting force.
It could be seen clearly from the table, with the increase of wear, cutting force was also growing, and the change trend of which was similar in the process of the tool life, which resulted in increased cutting force were the main factors of the increase of the amount of tool wear.
Online since: February 2012
Authors: Li Gang Cai, Guo Ping An, Yong Sheng Zhao, Hong Ke Chu
By comparing with those of the conventional BT toolholder, the BTF toolholder has higher stiffness and outstanding connecting properties.
Generally, the toolholder–spindle connecting performance is affected by many factors, such as rotational speed, material, clamping force, magnitude of interference along the taper shank of the holder.
However, the clamping force is the critical factor for improving the BTF toolholder-spindle connecting performance due to its special structure.
The clamping force is the critical factor in effecting the two parameters.
Vol. 41-2 (1992),p. 637-643 [2] Song Zhang and Xing Ai: Mechanical Science and Technology.
Online since: January 2014
Authors: Ming Jin Zhang
Most of all the bridges are the concrete continuous box girder with long cantilevers and variable section, because of the material properties and the level of technology continues to progress.
More than 90% of the bearing capacity to resist the weight of the beam, and its technical and economic benefits are affected
The solid finite element model considers the vehicle impact factor, impact factors is 0.3 in the solid element.
Mechanical Behavior Analysis and Design Experience of Low-pylon Cable-stayed Bridge[J].
Analysis of mechanical Behavior of an Extradosed Bridge with diagonal Bracings Arranged [J].Bridge Construction,2013,43(2):51-57.
Online since: August 2010
Authors: Ping Bo Wu, Yao Hui Lu, Jing Zeng, Xing Wen Wu
Introduction The welding deformation is the most important factors on welding quality.
However, due to numerous factors involved in welding process, it isn't applicable to predict welding deformation just depending on experiments data, especially for the large structure.
The directed method of thermo-mechanical coupling was taken to simulate welding process in this paper.
The coupling element solid5, the material property which changed with temperature and the bilinear isotropic hardening material model BISO was selected to establish FE model.
It will not only increase the cost but also change the distribution of residual stress, and also will affect fatigue strength and fatigue life of bogie frame.
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