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Online since: November 2011
Authors: Yan Cong Li, Hui Yong Shan, Shu Huan Li, Xin Song
This method starts design of ring die from the pellet product property, and then gives concise analyses to the concept design and optimization design of ring die; by this design method, the porosity of the ring die and the pellets productivity of this ring die are increased.
The parameters that affect density of pellet are valid length of hole, hole diameter, ratio between the hole diameter and the hole depth (RHD).
The synthetic affect of pressure force and fraction force made the ring die bending.
Fig.6 Relation between stress and elastic modulus Fig.7 Relation between strain and elastic modulus Summary Key factors affect performance of the ring die structure is obtained.
[9] Youbai Xie: China Mechanical Engineering, Vol.11(1-2)(2000), p.26~32 [10] Yancong Li: Journal of Anhui Agricultural Sciences,Vol. 39(13)2011, p.8100~8101
Online since: September 2011
Authors: Zhang Yong Wu, Qing Hui Wang, Xi Wu, Cheng Zhuo Wen, Xian Wang, Jing Tao Wang
This paper in full consideration of the rheological properties of MRF and the structure of the traditional pilot operated relief valve, based on analysis of the key technical problems existing in this type of valve when using MRF instead of mineral oil.
The key technical problems of the pilot operated relief valve for MRF system Due to the special physical and chemical properties of MRF, when we use MRF is as the working medium of hydraulic system, the magnetorheological components in hydraulic system will be designed to face the following key technical problems.
Noise of the hydraulic system is divided into mechanical noise and fluid noise.
Damping force of the MRF valve decide to set the pressure range of the pilot operated relief valve for MRF system, and it influence the properties of the pilot operated relief valve for MRF system and the working efficiency of hydraulic system.
Ji: Chinese journal of mechanical engineering Vol. 16 (2005), p. 1625
Online since: March 2012
Authors: Xue Hui Wang, Can Zhao, Wen Min Chen, Wei Hua Wu
Introduction The Ti-6Al-4V (TC4) α+β titanium alloy are widely used in aerospace industry due to preserve better mechanical property with highly favorable properties such as a high strength-to-weight ratio, good heat treatment capability, low density, good biocompatibility and resistance to corrosion under high temperature conditions [1-3].
The study on the chip formation mechanism not only help to understand the cutting process, but also is helpful for the correct selection of tool geometry angle, cutting speed, feed rate and other related factors, so as to optimize the cutting process in the real production [6].
After workpiece material and its properties are determined, the cutting parameters have important influence on chip shape.
Tool geometric angle is an important parameter which affects the tool cutting property, the changes of geometric angle can affect the tool life.
(In Chinese) [6] Yujun Cai, Chunzheng Duan, Minjie Wang, et al: Journal of Mechanical Strength, 2009, 31(3): 387-390.
Online since: October 2015
Authors: Robert Kočiško, Tibor Kvačkaj, Andrea Kováčová, Michal Zemko
In the simulation, three main factors such as an intersecting angle of Ф = 90°, 100°, 110° a 120°, outer corner angle R (ψ) and inner corner angle (r) were being varied.
INTRODUCTION Ultra-fine grained materials are currently of great interesting due to their unusual mechanical and physical properties [1-5].
Outer corner angle ψ (or outer radius R) is a next parameter significantly affecting the distribution of plastic deformation in a sample.
[8] Matvija, M., Fujda, M., Milkovič, O., Kvačkaj, T., Vojtko, M., Zubko, P., Kočiško, R., The effect of ECAP and subsequent Post-ECAP annealing on the microstructure and mechanical properties of AlSi7Mg0.3 alloy.
Effect of die parameters and material properties in ECAP with parallel channels.
Online since: July 2024
Authors: Haydar Al-Ethari, Shaima'a J. Kareem, Wurood Asaad
The films made of Al2O3 and TiO2 have qualities including high hardness, chemical resistance, thermal stability, and good mechanical properties.
This phase offers enhanced mechanical properties and is commonly used in applications such as thermal barrier coatings.
These structures provide desirable mechanical properties, including high hardness, wear resistance, and thermal stability[27].
It is commonly used as a coating material due to its excellent mechanical and thermal properties.
Mechanical and physical properties of engineering alumina ceramics (Vol. 23).
Online since: April 2016
Authors: Bo Zhu, Xun Cai, Yong Wei Wang, Rong Huan Han, Yong Wei Li, Li Yuan Yu
Polymer has very extensive applicationboth in chemical fields and in daily life,but due to its poor surface hydrophilicity and wear resistance, the further application of polymer materials were limited.In order to improve its surface properties, modification are needed on the surface of the polymer.Polymer surface modification means to operate on the surface of polymer within the scope of nanometer level, and give some new properties on material surface,such as hydrophilicity, scratch resistance, under the premise of without affecting the material ontic properties.
In order to improve their surface activity and bonding property, to surface modification are usually needed.
Discussed the dosage of initiator, reaction temperature, monomer concentration, monomer type and a variety of factors on the influence of process.
Irradiation treatments Crosslinkingin the material surface by irradiation can improve the using temperature, and improve the mechanical properties.Such as F - 30 has lower melting point (230℃~ 250℃), and its mechanical strength is poor in 200℃,by irradiating above the glass transition temperature, we can make the leading effect of irradiation cracking backed up to irradiation cross dominant effect.
Atomic force microscopy probe shock method The smooth and small area on the Nano-sized polymer surface can be formed by using atomic force microscope probe vibration, and it play an important role in the improvement on the properties of polymer micro friction.
Online since: March 2008
Authors: Jean Marie Dubois, V. Fournée, Marie Geneviève Barthés-Labrousse
Those Properties of CMAs We Know Something About V.
Emphasis is put on surface properties.
Very frequently, a distribution of occupancy factors must be considered on top of the atomic positions in order to describe the chemical disorder inherent to the compound.
Mechanical Properties The study of large unit cell CMAs and of quasicrystals under compression stress at high temperature demonstrates an atypical behavior.
However, their poor corrosion resistance above 550°C together with a strong decrease in their mechanical properties at high temperature, are major limiting factors in this type of application.
Online since: July 2011
Authors: Guo Wei Ma, Jing De Li, Hong Yuan Zhou
The current study aims to simulate and discuss with emphasis on factors that affect the energy absorbing performances of graded cellular structures.
Limited researches have been made to investigate the mechanical properties of the cellular materials with density gradient.
Cellular solids: structure and properties, 2nd edition.
Mechanical properties of functionally graded 2-D cellular structures: A finite element simulation.
Philosophical Magazine A: Physics of Condensed Matter, Structure, Defects and Mechanical Properties, 81(12), 2765-2783
Online since: July 2021
Authors: Evgeniy G. Klikin, Svetlana D. Pozhidaeva
The Places of Products Localization and the Influence of this Factor on the Technological Characteristics Svetlana D.
It was found that different variants of product localization of interaction CuO with acids which were implemented in different proportions, prevented the creation of a unified method for producing salts in such systems Introduction The using of metal salts, including carboxylates for creating new promising materials determines the constant interest in these compounds in terms of obtaining and studying their structure and properties [1-6].
In the latter case, suspended particles under the action of mechanical, hydro-mechanical influences enter the volumetric phase.
In general, this factor should be considered significant.
Levine (Eds.), New materials preparation, properties and applications in the aspect of nanotechnology, Publishers Inc., New York, 2020, pp. 189-196.
Online since: August 2011
Authors: Jun Chen Li, Xu Dong Li, Jie Sheng
Therefore, not only from the "organization" perspective, but must "structure, texture and shape" point of understanding of material properties and the microstructure evolution and failure behavior of the deformation [1].
After the judge pi Laguerre unit into which, from the binary file on the hard disk one by one read into this unit and adjacent units of the geometric information of the affected data to the computer memory involved in operations, through operations, generating a new cell where pi and stored data New Group structure array, one by one close to the affected units modified pi the geometric information and data, and then locate the modified new data replace the outdated data in binary file, and finally the new unit will be pi generated data appended to the information data stored Laguerre Geometry the end of the binary file.
For spherical particles with mixed fiber reinforced composite materials, generally use a single reinforcement unit cell model to simulate, since these models are too idealistic, neglected many in fact have a great impact on the performance factors.
These two programs will receive orientation distribution and handling of grain reserve ProDesign software visual interface properties can achieve the second phase crystal orientation of the visualization.
Computer technology to provide digital material for people to manipulate the material microstructure, "samples", according to the computer can "sample" to composite microstructure calculation of the mechanical response and, based on numerical results to predict the microstructure of the material properties, and then guide the design of advanced materials.
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