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Online since: March 2025
Authors: Sandra Mayang Dika Ridwan, Muhammad Ihsan Mukrim, Rustan Tarakka, Nasaruddin Salam
At 10%, the f value ranges from 0.0005004 to 0.0011364, where the experimental friction factor tends to be lower than the theoretical friction factor.
Introduction Fluid flow is known to have several flow properties, both static and dynamic, making it very interesting subject to study.
The density concentration refers to the number of solid particles dissolved in the liquid phase Changes in density concentration can affect the properties of two-phase fluid flow.
The effect of liquid viscosity on changes in density concentration, liquid viscosity is one of the important factors that influences changes in density concentration in two-phase fluid flow.
This can be explained by the nature of density as a factor that influences fluid flow properties, especially in the context of liquid-solid multiphase flow.
Online since: May 2010
Authors: M. Ashraf Imam, Ralph W. Bruce, Arne W. Fliflet, Chad Stephenson, Hugo E. Huey
Conventional methods for sintering and melting of titanium powder are costly, as they are energy intensive and require high vacuum, 10 -6 Torr or better, since titanium acts as a getter for oxygen at high temperature, adversely affecting mechanical properties.
For decades, titanium usage was only where critical to meet very high quality, tolerances, reliability, purity, structural integrity and other factors because of the high cost of the manufacturing process which was typically a vacuum arc re-melting (VAR) process.
Prior to beginning processing the chamber was pumped down to a pressure of about a millitorr using a mechanical pump followed by a sorption pump.
in the titanium powder compact limited the densification of the sintered material but did not affect the melted material provided it was held above the melting point long enough for the gas to escape.
Online since: January 2016
Authors: Pichitchai Butnoi, Ploypailin Yongsiri, Nuttapon Pisitpipathsin, Puttapon Pengpad, Patamas Bintachitt, Pratthana Intawin, Kamonpan Pengpat
gkamonpan.p@cmu.ac.th Keywords: Ferroelectric properties, PZT, BCZT Abstract.
BCZT ceramic system which presents a high dielectric and high mechanical properties [5-6] with low Curie temperature (TC ~ 120 °C).
The ferroelectric properties were measured using a Sawyer Tower circuit.
This can affect to the decrease in remanent polarization (Pr).
Physical and Ferroelectric properties of (1-x)PZT- xBCZT ceramics.
Online since: November 2017
Authors: Subrata Chatterjee, Gopinath Thirunavukarasu, Sukumar Kundu
These will adversely affect the service properties of the joints, and are the main reasons why dissimilar-metal joining is normally far more complex than similar-metal joining in many respects.
Room-temperature mechanical properties and 3.
Room-temperature mechanical properties of the base metals (TiA and SS) were presented in Table 2.
Tensile Properties Assessment Fig. 6.
Mechanical properties increased continuously till 850 °C and then dropped together drastically at 875 °C.
Online since: December 2012
Authors: Bin Tian, Xiao Chun Lu, Gang Xu, Yan Fu Qin
Influence factors in the durability of concrete, in addition to chlorine salt corrosion, frost damage is an important factor of affecting the durability of concrete construction.
The study about mechanical properties of concrete frost resistance Dalian University of Technology has been some progress, a large number of test studies made by using triaxial test machine developed by Dalian University of Technology, on the basis of biaxial test of ordinary concrete ,they create a simple easy to use concrete failure criteria by studying characteristics of biaxial failure envelope and the trend of stress-strain curved, which make calculation model similar to actual engineering stress state, and thus be able to provide the test basis and more analysis methods for the design and durability analysis of this kind of structure.
For the current research about mechanical properties of concrete after freeze-thaw cycles, are all on the premise of a large number of test specimen as the specimen were damaged, on the study about mechanical properties of concrete after freeze-thaw cycles, many scholars regard freeze-thaw cycles of concrete as the process of fatigue damage, and lead damage variable point of view in the damage mechanics to analyze the failure criterion of concrete.
Because of material properties of concrete are complicated variable, and the multiaxial strength and deformation have great differences with the difference of multiaxial stress state.
(In Chinese) [10] Yu Maohong: submitted to Int J of Mechanical Seienee, Vol, (25)(1983), p.71
Online since: October 2010
Authors: Mohammad Reza Shabgard, Keivan Amini, Babak Sadizadeh, Hamid Pourziaie
With respect to application and properties of AISIH13 tool steel, electrical discharge machining is well known method for its machining.
Electrical discharge machining (EDM) is known to be applicable for conductive material regardless of their physical and mechanical properties [1,2].
Also the values of R2 (Table 6) confirm that the relationships between the independent factors and responses can adequately be explained by models.
These values show that the relationships between the independent factors and responses can adequately be explained by models.
The pulse-on time is the most important factor affecting TWR in both the EDM and the US-EDM processes. 6.
Online since: November 2014
Authors: Ojo Kurdi, Saziana binti Samat, Mohd Azam bin Mohd Adnan, Muhammad Ilham bin Khalit, Zahirrudin bin Idris, Muhammad Nazir bin Mohammed Khalid, Ian Yulianti, Ridzuan bin Marawi
Introduction Designing a pressure vessel for extremely high pressure condition is quite complicated and required detail consideration in many aspects including permissible stress level, definition of operation, failures criteria, material properties.
The location of damage affects different modes of vibration differently.
The most important factor affecting the cost of the pressure vessel is the maximum pressure at which the system is designed to operate.
Therefore, a vessel with this thickness is safe if the safety factor is 1.
Our gratitude also goes to the CSM Laboratory and Vibration Laboratory, Faculty of Mechanical Engineering, Universiti Teknologi Malaysia for providing facilities and software package.
Online since: June 2025
Authors: Nicola Menga, Marco Ceglie, Guido Violano, Luciano Afferrante
Moreover, surfaces in many real-world applications are not “nominally” flat but instead exhibit an infinite variety of geometries with macroscopic curvature and roughness characteristics affecting interfacial phenomena, such as wettability [12].
Here, we develop a finite element (FE) model to examine the impact of nonlinearities arising from geometric factors, material rheology, and contact and friction characteristics.
Both frictionless and friction contact conditions are considered in the simulation in order to capture the role of interfacial shear stresses in affecting the contact behavior.
International Journal of Mechanical Sciences, 267, 108982
“Friction in rough contacts of linear viscoelastic surfaces with anisotropic statistical properties”, European Physical Journal E, 42, 1-8
Online since: November 2012
Authors: Qin Wang, Long Di Cheng, Jian Yong Yu, Xiao Jiang
This research is a comparative study of the physical properties of akund/cotton material and pure cotton material.
Results show that the enhanced structure of akund/cotton compact yarn typically results in a lower hairiness and improved mechanical properties.
The comparison of properties between cotton, kapok and akund is shown in Table 1[6].
Basic properties of yarns.
Form and dimension of the spinning triangle affects not only the yarn structure, but also the surface properties.
Online since: April 2014
Authors: Bao Xing Zhou, Yue Xia Zhang, Ru Niu Fang
As the performance of the accelerometer circuitry is affected by temperature, a readout system is introduced for compensating the temperature drift and the non-linearity of this piezoresistive accelerometer by using the MAX1452 processor.
And LTCC multilayer technology allows realize different structures for sensor applications, Screen printed and piezoresistor materials can be used to sense the mechanical deformations in MEMS structures.
What’s more, LTCC sensors have good performance in high temperature or corrosive environment because of it has good chemical properties and high temperature stability.
Fig. 1 LTCC-accelerometer structure We select thick film resistors (ESL3414) as piezoresistors for this accelerometer, Because ESL3414 Series high gauge factor resistor pastes are specifically designed for piezoresistive applications on LTCC substrates [4].
The performance of accelerometer will be affected by temperature changes, causing shifts in the zero-load output or offset voltage.
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