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Online since: February 2014
Authors: Parinya Srisattayakul, Charnnarong Saikaew, Anurat Wisitsoraat, Naphatara Intanon
It was found that the three coating factors affected the elastic modulus of the MoN coating on upper hooks.
In addition, mechanical, physical, and chemical properties of molybdenum nitrides are typically important for wear resistance, crack resistance, and corrosion resistance [4].
The elastic modulus (or Young’s modulus: E) is a material property which describes the elasticity or stiffness of a material.
Interaction effect plots of elastic modulus Since all sputtering factors and interactions between two factors were statistically significant at the significance level of 0.05, interactions were typically used to determine the optimal operating condition of the significant factors [8].
Since the interaction effect between the factors of operating pressure and Ar/N2 was higher than the other two interaction effects (see Table 2), the interaction effect plot between the two factors (operating pressure and Ar/N2) then was used to determine the optimal operating condition of the significant factors.
Online since: August 2011
Authors: Wei Li Tian, Dong Dong Wang, Cheng Qi Wang
Experimental Study on Influential Factors of Adiabatic Temperature Rise for Mass Concrete Dongdong Wang1,a, Weili Tian2,b and Chengqi Wang3,c 1,3Shanghai Third Harbour Engineering Science & Technology Research Institute Co., Ltd.
The results reflect that binder is the main factor affecting adiabatic temperature rise, mineral admixtures such as fly ash can significantly reduce the rate and amount of heat development, large quantity substitution of slag in concrete can relieve the concentrative heat liberation, the retarded superplasticizer can prolong the exothermic process effectively and high placing temperature has adverse effect on temperature control of mass concrete.
It is essential to know the thermal properties of concrete to deal with any problems caused by temperature.
Physical and mechanical properties of cement and mineral admixtures are shown in Table 2 and Table 3.
Experimental results indicate that the composition and content of binder in per cubic concrete are the main factors influencing adiabatic temperature rise of concrete.
Online since: March 2013
Authors: Trithos Kamsuwan, Taweechai Amornsakchai, Toemsak Srikhirin
The type, geometry, distribution, orientation and volumetric concentration of fibers in the matrix are factors that affect the mechanical behavior of the composites [1].
Experimental Physical and mechanical properties: Characterization of the behavior of the cement mortar was performed through measurements of properties of this product in the hardened state.
It involved the determination of mechanical properties (compression, tension, flexure and toughness).
This section describes the mechanical properties of FRC designed to evaluate effects of fiber and fiber type on mechanical properties of FRC.
The test results showed that HDPE fibers had increased toughness indices and residual strength factors.
Online since: July 2015
Authors: A.K.M. Mohiuddin, Meftah Hrairi, M. Eshteyah, M.S. Dawood
Furthermore, the size of the tools and friction coefficient are some of the major factors that influence the clinching joint [3].
In our basic model, the materials used are as follows: Steel 201 sheets & Aluminum 5052-H34 both with same thickness of 1.2 mm (punch and die side) – the mechanical properties are shown in Table 1.
Table 1: Mechanical properties for Steel 201 and Al 5052 Material: Steel 201 Al 5052-H34 Mass Density ton/mm3 7.7503 e-9 2.689e-9 Young’s Modulus 1.972 e5 MPa 7.0327e4 Poisson’s Ratio 0.29 0.33 Yield Stress 309.79 MPa 203.27 The true stress-strain curve for these materials can be approximated by using the power law: material was modeled to be isotropic.
The clinching process parameters need to be optimized to get more thickness in the bottom of the joints without affecting the other parameters, and this is achieved not only by optimization but also by obtaining an accurate experimental data for the material behavior and properties in order to reach the maximum strength and the highest quality of the joint.
There is some discrepancy between the two curves due to the mesh size difference and the material properties and behavior.
Online since: December 2009
Authors: Hassan Farhangi, S. Alipour
They showed that the mechanical properties of actual corroded specimens correspond well with that of the artificially pitted specimens.
Accordingly it was concluded that the mechanical properties of pitted sections can be predicted using artificially pitted specimens [5, 8].
Hp D Experimental Methods Low carbon steel plates were used in this study as a structural material to simulate the effects of corrosion pits on mechanical properties.
It is clear that the introductions of first few pits and their growth to larger depths could be very detrimental to the mechanical properties of structural alloys.
Pilkey: Peterson`s Stress Concentration Factors (John Wiley & Sons Inc., Canada 1997).
Online since: May 2007
Authors: Mitsuo Niinomi, Goroh Itoh, Qing Zhou
The mechanical properties of three alloys including two β and one α+β are presented, particularly the characteristic of β alloy differing from that of α+β alloy.
In this paper, the mechanical properties of these two β alloys are presented comparing with that of α+β alloy.
Mechanical properties Mechanical properties are listed in Table 1.
Superplastic characteristics are also affected by the other factors like temperature, strain rate, initial grain size etc.
Conclusion The mechanical properties of two β titanium alloys have been compared with α+β alloy.
Online since: June 2022
Authors: Zhi Yong Tan, Jie Bing Wang, Fan Fu Meng, Cong Xu
The current situation of preparation and mechanical properties of typical rivet joints on C/SiC composites is summarized.
This results in the randomness on mechanical properties of the connecting unit.
The failure of (a) and (b) belong to the global damage mode, but the latter should take the bonding force between rivet and connecting plate, the material properties and the factors of instability failure mode into consideration.
The mechanical influencing factors and characteristics are analyzed preliminarily.
The key characteristics of different defects, stress concentration and other factors affecting the connection are obtained by calculation and simulation, and can be verified by the actual test.
Online since: March 2013
Authors: Józef Błachnio, Artur Kułaszka
The paper outlines initial results of investigations, carried out with use of the active thermography, how the temperature affects onto thermophysical properties demonstrated by superalloys used for construction of gas turbines.
These investigations enabled to find out variations of thermophysical properties of these superalloys as a function of temperature.
Operation of gas turbines is always associated with occurrence of failures that may happen to their components [1], in particular to the blades that are the most exposed to various detrimental factors.
The material grains expand by more than 50% (Fig. 3) that adversely affects mechanical properties of the alloy.
The detected growth, merging (coagulation) and corrugation of particles within the γ’ phase substantially affects deterioration of heat resistance properties demonstrated by the alloy.
Online since: September 2013
Authors: Peng Zhang, Ji Xiang Gao, Xiao Bing Dai
Review of Mechanical Properties and Durability of Concrete Containing Nano-particles Jixiang Gao1, a, Peng Zhang1, b and Xiaobing Dai1, c 1College of Water Conservancy and Environment Engineering, Zhengzhou University, Zhengzhou, Henan, 450001, China agaojixiang2010@163.com, bzhangpeng8002@163.com, cdaixiaobing2010@163.com Keywords: Concrete, Nano-particles, Mechanical properties, Durability.
In order to in-depth understand the characteristic of the concrete containing nano-particles and promote the application of the concrete containing nano-particles in practical engineering, a series of research works on the mechanical properties and durability of the concrete containing nano-particles were summarized based on the current study results.
Study of Mechanical Properties of Concrete Containing Nano Particles Study results have shown that the volcanic activity of SiO2 (NS) is far higher than that of silicon powder.
Study of Anti-freezing Performance of Concrete Containing Nano Particles In the cold region, freezing and thawing cycle is one of the important factors that affect the durability of concrete.
Conclusions From the above-mentioned related research results on the properties of the concrete containing nano-particles, it can be concluded that the addition of nano mineral powder (nano-SiO2, nano-CaCO3) in concrete has significant improvement on the strength and durability performance of the concrete.
Online since: October 2013
Authors: Xu Sheng Gan, Hao Lin Cui, Ya Rong Wu
It directly concerns the evaluation results of safety state for flight mechanical properties of flight systems, and even touches the safety management and decision-making[1][2].
In addition, in the evaluation process of these methods, each factor weights usually has been pre-determined, however, these weights are affected by many factors, and is a process of dynamic development, the pre-determined weights is clearly contrary to the fact.
Human is one of the important factors in human-machine-environment system.
Environment refers to collection of various external conditions affecting and restricting the flight safety.
These factors include: nature environment, space environment, service environment and social environment.
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