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Online since: January 2021
Authors: Sri Wuryanti, Tina Mulya Gantina, Indriyani Indriyani
The heat transfer properties were calculated using the reported empirical formulae [2]. ​​
The obtained data were used to calculate the film temperature and from there the thermodynamic properties namely 𝜌, μ, cp, k, Pr, and later on the Reynold number were determined.
Table 1 Chemical and physical properties of water from literature at film temperature [7].
Journal of Mechanical Science and Technology, 2018. 32 (8): p. 3975–3982
Journal of Mechanical Science and Technology, 2017. 31(7): p. 3317–3328
Online since: September 2007
Authors: Min Jie Wang, Jun Zhong Pang, Chun Zheng Duan
Surface roughness is also an important factor affecting mold service performances.
Table1 lists the most important properties of TiAlN coating.
If the PCR due to error (unknown and uncontrolled factors) is low, 15% or less, then it can be assumed that no important factors are omitted from the experiment.
This shows that some factors are omitted from the experiment.
Thus, this shows that influence of factors V and Rd on static δ is not significant, and influence of factor V is slight.
Online since: August 2015
Authors: John Dear, Jian Guo Lin, Mohamed Mohamed, Zhusheng Shi, Trevor Dean
Strain-based continuum damage mechanics model for predicting FLC of AA5754 under warm forming conditions Mohamed Mohamed1,3a *, Zhusheng Shi1,b, Jianguo Lin1,c , Trevor Dean2,d, John Dear1,e 1Department of Mechanical Engineering, Imperial College London, London, SW7 2AZ, UK 2School of Mechanical Engineering, University of Birmingham, B15 2TT, UK 3School of Mechanical Engineering, Helwan University, Helwan, Egypt ammohamed@imperial.ac.uk, bzhusheng.shi@imperial.ac.uk, cjianguo.lin@imperial.ac.uk, dt.a.dean@bham.ac.uk, ej.dear@imperial.ac.uk Keywords: Aluminium alloys, Warm forming, Forming limit curve (FLC), continuum damage mechanics (CDM) model.
Several factors affect the FLC including sheet thickness [5], temperature [6], strain rate and grain size [7] and strain hardening exponent [8].
In this case, is a correction factor representing the difference between the uniaxial tensile data and cup (formability) test results at .
As the temperature increases, the effects of strain rate on tensile properties and FLC position become more prominent.
Influence of the plastic properties of a material on the forming limit diagram for sheet metal in tension.
Online since: August 2023
Authors: Shinya Kato, Tetsuo Soga, Naoki Kishi, Shunsuke Aiba, Mohd Faizal Achoi
Herein, the effect of anti-solvents on the surface morphology, structural properties and optical properties of CBI films as well as the solar cell performance to identify the suitable anti-solvent for CBI solar cell is described.
It means that the anti-solvents influence the absorption properties of CBI films.
The UV-vis absorption properties of CBI films fabricated with different anti-solvents.
The untreated sample shows poor morphology and low UV absorption properties.
Dai, “Air-stable layered bismuth-based perovskite-like materials: Structures and semiconductor properties”, J.
Online since: September 2011
Authors: Yi Wang Bao, Xiao Gen Liu
On the other hand, the change of the support condition (i.e. the aging of the supporting structure and structural sealants or loosening of the adapting pieces) strongly affects the reliability, capacity of resistance to wind load and earthquake function, airproof and waterproof properties of the glass curtain wall.
It can be seen that the dynamic properties of the glass specimen changes after the bolts is slacked, it is obvious that the natural frequencies decrease as the bolts is slacked.
The exposed frame supported curtain wall glass in mechanical analysis is usually treated as a rectangle plate fixed by elastic clamp at four edges [8-10], the structural stiffness of an elastic clamped rectangle glass should be between the simply supported plate and the clamped rectangle plate.
In fact, the expected natural frequency and stiffness for a curtain wall glass depend on many factors, determining the expected natural frequency of the curtain wall glass and their variation with time are important for estimating the reliability of glass curtains or window glasses.
As an example, in the experimentation above, the mechanical parameters of the glass specimen are: E = 72 GPa, = 0.22, m = 10kg/m2, and the lower limits natural frequency of the glass specimen can be determined by Eq.(1): =1375.3(rad/s) (Hz) The value of 219Hz is the evaluating criterion for risk analysis of this glass, from Fig.4 it can be seen that the corresponding clamping force is 0.53, in other words, when the bolts are slacked 47%, the glass may carry a fall off risk.
Online since: January 2013
Authors: Fu Shun Liu, Min Zhang, Shu Qing Wang
Another widely used mode updating methods are sensentivity-based approaches, seeking to find correction factors for each individual finite element or for each design parameter relating to each finite element.
The sensitivity-based approach has an advantage of identifying parameters that can directly affect the dynamic characteristics of the structure.
Because the difference between measured and analytically predicted modal properties is utilized in a sensitivity-based approach, measured and predicted modes must be pairing and scaling correctly [8].
Damage identification and health monitoring of structural and mechanical systems from changes in their vibration characteristics: A literature review, Los Alamos National Laboratory Rep.
B., A summary review of damage identification methods that examine changes in dynamic properties, Shock and Vibration Digest, 30 (1998), 91-105
Online since: July 2013
Authors: Manas Paliwal, Youn Bae Kang, Elhachmi Essadiqi, In Ho Jung
Many researchers [2-4] have related the formation of secondary phases with the final mechanical properties for Al containing Mg alloys.
The extent of microsegregration directly affects the mechanical properties of the final products and requires post solidification processes like annealing and homogenization before the alloys can be put to commercial application.
Microsegregation Model The model accounts for the important kinetic factors such as solute (Al) back diffusion in Mg (hcp) phase, secondary dendrite arm coarsening, dendrite tip undercooling and eutectic undercooling.
Online since: April 2012
Authors: Jun Xiao, Xu Dan Dang, Shao Jie Shi, Yi Guo
Abroad Marsaco and Partridge studied the out-of-plane tension, shear and compressive properties of X-cor sandwich [4,5].
At home Xu Tian, Yong Li and Jun Xiao trial-produced the X-cor sandwich and researched its molding process and basic mechanical properties [7,8].
The transversal properties of tensile Z-pins are weak.
The hypothesis of the material stiffness degradation rules is that one failure element only affects its own elastic properties and does not affect other elements.
Because of the failure of interface elements, the mechanical properties of the X-cor sandwich decrease slightly.
Online since: July 2015
Authors: Götz T. Gresser, Markus Milwich, Manfred Hammer, Jan Knippers, Martin Uwe Witt
Fiber reinforced plastics, due to their good mechanical properties and simultaneously low density, are very attractive for many uses.
The low density of the materials and the tailored mechanical properties by fiber orientation allows weight savings up to 60% compared with steel and 25% compared with aluminium.
In particular the high energy involved in the production of components as well as the FRPs affects the eco-balance negatively.
Few research projects in the area of the Pultrusion of natural fibre-reinforced plastics use on the one hand often a petrochemical matrix or only partially bio-based matrix and on the other hand the products mostly have a bad fiber-matrix adhesion with unsatisfying mechanical properties.
· Consistent strength: Regenerated fibers possess a consistent strength without quality variations, so that the component weight and the safety factor can be reduced
Online since: April 2022
Authors: Khaled Abou-El-Hossein, Zvikomborero Hweju
It is against such a background that the appropriate combination of factors that influence surface roughness be cautiously determined and controlled during product turning.
Additionally, functional properties such as frictional properties, corrosion resistance, fatigue life and fit of mating surfaces for assembly are all affected by surface finish [1].
Ponce, ChrisTaylor, et al., "Control of deviations and prediction of surface roughness from micro machining of THz waveguides using acoustic emission signals," Mechanical Systems and Signal Processing, vol. 85, pp. 1020-1034, 2017
Chellamalai, "Monitoring of hard turning using acoustic emission signal," Journal of Mechanical Science and Technology, vol. 26, pp. 609–615, 2012
Jun, "A systematic approach to the Kansei factors of tactile sense regarding the surface roughness," Applied Ergonomics, vol. 38, pp. 53-63, 2007
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