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Online since: November 2025
Authors: Denis Andrei Predu, Cristian State
These factors can significantly impact the functionality and operational lifespan of critical components, such as control buttons and switches.
Categories of Equipment Failures This is the most prevalent cause of equipment failure, affecting all types of machinery.
Numerous studies have investigated the influence of TPU powder on the mechanical properties of printed items.
This segment imparts elasticity and elastomeric properties to the TPU.
Mechanical Properties of Additively Manufactured Thermoplastic Polyurethane (TPU) Material Affected by Various Processing Parameters
Online since: December 2011
Authors: Zhi Quan Zhao, Gui Min Zhang, Wen Qin Bai, Jian Bin Zhuang, Ming Lei Ding, Wei Qiang Wang, De Dong Hu
Because of its inherent surface effect, small size effect and quantum effect, it has special optical properties, thermal properties, magnetic properties and mechanical properties which had been widely used in various industrial fields.
Because of its inherent surface effect, small size effect and quantum effect, it has special optical properties, thermal properties, magnetic properties and mechanical properties which had been widely used in various industrial fields.
Supercritical fluid possesses a lot of unique properties.
Changes of pressure mainly affected solute concentration in supercritical solution, thus affecting particle shape and size produced by the process of the expansion of supercritical fluid.
Temperature changes caused density changes in SCF, thus affecting the solubility of the SCF.
Online since: March 2007
Authors: Jong Ho Kim, Do Kyung Kim, Seung Hwan Jo
It was revealed that the surface modification of nano particles significantly affected sintering behaviors and resulting physical properties.
In consideration of this, the effects of preparation conditions on surface states such as aggregation property and surface adsorbed organic molecules and subsequent sintering behavior are very crucial to the optimization of the properties of ceramic materials.
Also, the effect of the fuel to nitrate ratio on powder properties and consequent sintering behavior was inspected in glycine nitrate combustion process.
Finally, it can be concluded that the surface condition is a very important factor in affecting the sintering behavior of nano particles in comparison to micron-sized particles.
Thus, the effective control of the surface state of nano particles is needed to maximize the sintering properties of GDC nano particles.
Online since: July 2014
Authors: Rong Feng Li, Wen Jie Peng, Li Yu, Dong Liu, Huan Xue
The residual stress not only affects the performance of corrosion, cracking and fatigue strength, but also has a huge impact on the physical and mechanical properties of materials, which can greatly break the strength of the structure.
Mechanical methods contain stress releasing and stress superposing methods.
The mechanical property of deposited metal is with Rel=470MPa.
The linear relationship between residual stress and strain increment relates with the steel material, surface condition, ball diameter, the strain gage size, distance between strain gage and ball center, impact energy, static pressure and other factors.
The calibrating plate should full anneal to erase the internal stress, and the material property change should be avoided in this process.
Online since: July 2011
Authors: Vu Thua Nguyen, Michael Lee, Gary Savage, Hallvard Gustav Fjær, Dag Mortensen, John F. Grandfield, Sébastien Dablement
The air gap formation due to metal shrinkage and mould deformation is the main factor which determines the heat extraction.
Operators of these machines are concerned with producing rod with the required properties, without defects and achieving good wheel and belt life.
Material properties Aluminium alloy 1350 was modelled.
The fluid properties published in [7] were applied.
The mechanical properties were taken from [8].The wheel and belt properties are given in Table 1.
Online since: February 2012
Authors: Zhong Jin Wang, Zhan Jun Liu, Yao Wang, Tie Jun Gao
Influences of buckling and wrinkling as well as viscous medium properties in necking process on the forming process is analyzed by finite element method.
The viscous medium with mechanical properties meeting formula (1) was divided into solid element.
The finite element analysis model Table 1 Mechanical properties of 1Cr18Ni9Ti yield strength σs (MPa) tensile strength σb (MPa) elastic modulus E (GPa) percentage elongation δ (%) strength factor K (MPa) hardening exponent n 206 539 200 40 980 0.34 Deformation Process Analysis The finite element analysis results of the changes of the B-B section geometrical shape of the tube blank and the pressure field of viscous medium in the viscous-medium outer-pressure necking process are shown in Fig. 3.
a) Before buckling b) Buckling and wrinkling c) Wrinkles were eliminated Fig. 3.The geometrical shape of the tube blank and the pressure field distribution of viscous medium in the necking process(m=0.3) The Influence Of Medium Properties On The Necking Process 1) The influence of medium properties on the buckling process The non-uniform pressure distribution of viscous medium is an important affecting factor on delaying the buckling of the tube blank and eliminating wrinkles, while it is mainly attributed to the rate-sensitivity, so viscous media with different rate-sensitivity are chosen to perform finite element analysis of the necking process.
Journal mechanical engineering science.
Online since: September 2013
Authors: Anna Marzo, Giuseppe Marghella, Maurizio Indirli
Most of the damages affecting ancient buildings are substantially due to the lack of connection between the perimeter walls and to the presence of heavy roofing with a rigid r.c. wall plate, often result of the traditional timber roofs replacement during restoration interventions.
Timber members have been investigated carrying out an in-depth visual survey and some non-destructive tests, in order to record useful information about defects, damages and decay situations, in addition to a preliminary evaluation of the mechanical properties of the structure.
Fig. 7. 3D views of the structural model In order to evaluate the bearing capacity of the structural system under the Ultimate Limit State and the seismic conditions, proper elements mechanical properties and load conditions have been considered.
Table 1: Load analysis Non Structural Dead Load (G2) Completion part Thickness [cm] Load [kN/m2] Planks 4 0.24 Tiles 2 0.40 Live load (Q1) Maintenance 0.50 Snow load (Q2) 1.60 The assumed mechanical properties are summarised in Table 2, where: γ is the mean value of wood density, E0 and E90 are the longitudinal and transversal moduli of elasticity; G0,90 and G90 are, respectively, the shear moduli in the parallel-perpendicular to grain planes and in transversal planes.
Table 2: Timber mechanical properties [9, 11] Species γ E0 E90 G0,90 G90 [kg/m3] [N/mm2] [N/mm2] Poplar 470 7000 464 438 156 Results.
Online since: August 2019
Authors: Ramesh Rajguru, Hari Vasudevan, Moeiz Shaikh, Arsalan Shaikh
Sanghvi College of Engineering, Mumbai, India 3UG students, Department of Mechanical Engineering, Dwarkadas J.
It can be processed in exorbitant temperatures; because they constitute properties, such as great strength, sturdy corrosion resistance and exceptional thermal stability, S.Hanasaki [1].
The experiments were performed based on Design of Experiments (DOE), L9 orthogonal array with 3 factors and 3 levels.
It was observed that the feed and the cutting speed were significant cutting parameters for affecting the surface roughness and the feed and depth of cut were the significant cutting parameters for affecting the material removal rate.
Control factors and their levels Designation Process parameters Units Levels 1 2 3 4 A Cutting Speed m/min 70 90 110 130 B Feed rate mm/rev 0.125 0.2 0.275 0.35 C depth of cut mm 0.2 0.4 0.6 0.8 2.3 Experimental Details The process of dry turning was done on Smarturn CNC lathe with Fanuc CNC control system.
Online since: August 2021
Authors: Ali Abbas Kadhem, Hayder Abbas Al-Yousefi, Qusay A. Jabal
IWP admixture properties are shown in table 3.
Table 7 shows the results obtained from experimental work, mechanical properties given in this table include tensile strength, compressive strength, and flexural strength.
Mechanical properties for all mixes in the study.
Mahdi, Mechanical properties of waste aggregate steel fiber reinforced concrete modified with waterproof admixture, international journal of civil engineering and technology, November 2018, vol.9, issue11, pp. 948-959
Mezher, Some Mechanical Properties of waste marble aggregate concrete reinforced with local steel pins as steel fibers, international journal of civil engineering and technology, January 2019, vol.10, issue 1, pp. 105-111.
Online since: July 2006
Authors: Farshid Pahlevani, J. Yaokawa, Koichi Anzai
In this study the different factor of this method was optimized by micro-structural investigation on the Al-A356 alloy.
Introduction If a metal alloy is conventionally cooled down in to the semi-solid state without mechanical agitation, the primary phase solidifies with a dendritic structure.
Porosity and segregation are the most common defects that affected the mechanical properties of castings.
Today semi-solid metal (SSM) has established itself as a scientifically sound and commercially viable technology for production of metallic component with high integrity, improved mechanical properties, complex shape, and tight dimensional control [1, 2].
Different factors would affect on the shape and size of solid particles: 1- BN spray coating because of its nucleation site and easily separation of nuclei, and also control the heat transfer through cup's wall was the best coating. 2- 40cm height of pouring make suitable turbulence in the melt and continuity in melt flow. 3- 50sec pouring duration not only make high enough turbulence but also the duration of turbulence will be acceptable. 4- 700°C pouring temperature also was the best pouring temperature with nucleation and viscosity (turbulence on the melt) approaches.
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