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Online since: August 2015
Authors: Najmul H. Abid, Anthony N. Palazotto, Mahmood Ettehad, Rashid K. Abu Al-Rub
Whereas, when damage is activated, Figure 2(a) clearly shows that one cannot easily predict the ultimate strength and ductility using the local plasticity-damage model as both properties are mesh-dependent.
Khaleel, "Influence of martensite mechanical properties on failure mode and ductility of dual-phase steels," Metallurgical and Materials Transactions, vol. 40A, pp. 796-810, 2009
Khaleel, "On key factors influencing ductile fractures of dual phase (DP) steels," Materials Science and Engineering A, vol. 526, pp. 140–149, 2009
Priestner, "Influence of ferrite-martensite microstructural morphology on tensile properties of dual-phase steel," Journal of Materials Science, vol. 31, pp. 2091-2095, 1996/01/01 1996
Tekeli, "The effect of martensite volume fraction and particle size on the tensile properties of a surface-carburized AISI 8620 steel with a dual-phase core microstructure," Materials Characterization, vol. 49, pp. 445– 454, 2003.
Online since: September 2003
Authors: Xi Peng Xu, Janusz Konstanty
The potential retentive properties of the matrix are often assessed, as in the case of wear properties, by its yield strength, since to break the hold on a diamond, the yield strength of the matrix has to be exceeded [21].
To meet all the requirements of any given application, a number of factors must be taken into consideration.
Diamond manufacturers provide the toolmakers with a wide range of natural and synthetic grits of varying properties such as mechanical strength, thermal stability and matrix retention characteristics.
Which concentration to use depends on a number of factors.
When selecting the segment composition, the material to be cut and its properties should be considered first.
Online since: December 2016
Authors: Klára Křížová, Rudolf Hela
Strength is the most important mechanical property of the concrete and this property enables it to be resistant against the effects of outer forces.
Strength can’t be considered as a constant value, it is dependent on many factors.
The mechanical properties of UHPC are predominantly determined by the quality of the transition zone between gravel and cement.
Vibration was used for the third compound but during the vibration the incorrect direction of the fine wires occurred, which affected the test results negatively, mostly the mechanical properties of the material.
Effects of Different Types of Steel Fibers on the Mechanical Properties of High Strength Concrete, Advanced Materials Research 1054 (2014) 80-84
Online since: June 2012
Authors: Zhi Guo Liu, Shi Lu Zhang, Zhi Tao Mu, Zeng Jie Cai
Introduction The aircraft aluminum alloy structure has the character of light weight and high strength,but it is sensitive to the local airport environment and easy to corrode under the effect of environment,further more the corrosion position would evolve to crack and propagate with the aircraft fatigue load,this would shorten the aircraft fatigue life[1,2].This corrosion and fatigue procession is affected by many factors,so it can be viewed as a essentially non-linear dynamic system,which suggests that the procession could be analysed by artificial intelligence theory and method.This paper applied artificial neural net method to analyse the corrosion fatigue life of aircraft LY12CZ structure with test data.
Acquisition and disposition of the test data The calendar life of aircraft will last 30 years and the structure material will be influenced by local environment during the service period,so this paper statistically analysed a typical airport environment factors and established accelerated corrosion environment spectrum with the equivalent relation theory to shorten the time of corrosion test.The composition of the environment spectrum is shown as Fig. 1,the dimension of LY12CZ specimen is shown as Fig. 2.
Dealing the Eq. 1 with logarithm,the S-N curve could be depicted as: (N≥5×103) (5) so relationship between the logarithm corrosion fatigue life and the stress level under equivalent corrosion year is linear,the fitting result was shown in Table 4,and the fitting line under equivalent corrosion 3 year was shown as in Fig. 5.As shown in Table 4 and Fig. 5,the linear correlation property between the lgSa and lgN is fine,and the slope parameter is correspondent to document[6].
[2] YANG Yugong,XUE Jingchuan,JIAO Kunfang.DFR Method In Corrosion Fatigue Analysis Of Aircraft Structure[J].Journal of Mechanical Strength, 2004,26(S):52-54
Research On Mechanical Prorerties Of LY12CZ Aluminum Alloy Under Calender Corrosion Environment[J].Journal of Mechanical Strength, 2003,25(2):227-228.
Online since: October 2015
Authors: Janka Mihalčová
This significantly affects the life cycle of oil and, consequently, the lubrication system.
Methods of Assessment of Physicochemical Properties of Oils, Chemické listy 103/5 (2009) 416-418
Kosiba, Research on properties of organic liquids and new test methods for lubricating oils, 1st ed., SPU, Nitra, 2014.
Kuna, Adaptive rejection filter for the drives stabilization of pressure die casting machines, Advances in Mechanical Engineering 6 (2014) 1-10
Kuna, Experimental Study of Correlation of Mechanical Properties of Al-Si Casts Produced by Pressure Die Casting with SiFeMn Content and Their Mutual Mass Relations, Advances in Materials Science and Engineering (2013) 1-7
Online since: March 2010
Authors: Chuan Zhen Huang, Bin Fang, Chong Hai Xu, Han Lian Liu, Sheng Sun
Simulation of Microstructure Evolution Coupled with Fabrication Pressure for Two-Phase Ceramic Tool Materials Chuanzhen Huang1 , Bin Fang 1,2, Chonghai Xu 2, Sheng Sun3 and Hanlian Liu 1 1 Key Laboratory of High Efficiency and Clean Mechanical Manufacture, Ministry of Education, Center for Advanced Jet Engineering Technologies (CaJET), School of Mechanical Engineering, Shandong University, Jinan China, 250061 2 School of Mechanical Engineering, Shandong Institute of Light Industry, Jinan China, 250100 3 School of Material Science and Engineering, Shandong University, Jinan China, 250061 Keywords: Simulation, Hot pressing, Ceramic tool materials, Microstructure Abstract.
Introduction Since many properties of ceramic materials, such as mechanical, electronic, magnetic or chemical, are affected and even dominated by the specific grain structure which is formed during fabrication.
The hot-pressing technology parameters, including fabrication temperature, pressure and duration time, finally govern the mechanical properties of the ceramic tool materials.
However, it is very difficult to optimize the fabrication parameters for the desirable microstructure and mechanical properties by experiments because they are closely related to one another.
It is proper that the maximum fabrication pressure is given 30MPa according to the properties of ceramic powders and the current experimental equipment.
Online since: January 2021
Authors: Asma Ababsa, Hachemi Ben Temam, Abderrahmane Gana, Ouahiba Herzallah
Introduction Electrodeposited nickel coatings are used in a wide range of applications to enhance mechanical properties [1], corrosion [2,3] and wear resistance [4] of the coated components.
The purpose behind the deposition of alloy coatings is attaining the properties which cannot be obtained with pure metal alone.
Alloying with Co enhances the properties of Ni coatings.
The effect of these parameters on the mechanical properties has been dealt with in detail in the literature [12, 13].
William, The properties of Electrodeposited Metals and Alloys, Handbook: Elsevier Publication 1986
Online since: May 2011
Authors: Bao Min Wang, Kai Song
China. (1) Research of the mechanical properties of construction formwork and the concrete mix ratio of construction formwork.
(5) Research of the cracking properties of construction formwork concrete.
Li Peng [17] used the Ansys software to conduct simulation research of the basic physical properties of construction formwork concrete shear walls, showing the reinforcement ratio of hook braces, the reinforcement ratio of vertical distribution and the effects of axial compression on the mechanical properties of the wall.
The China Academy of Building Research conducted a more systematic research of the mechanical properties of Type I and Type II DP formwork concrete shear walls [18].
[19] Yuanhong He: Dipy construction formwork concrete shear wall mechanical properties experimental analysis and design research [D].
Online since: May 2011
Authors: José Ignacio Pérez-Landazábal, Vicente Recarte, Vicente Sánchez-Alarcos
Influence of Long-Range Atomic Order on the Structural and Magnetic Properties of Ni-Mn-Ga Ferromagnetic Shape Memory Alloys V.
In parallel, an exhaustive research for new FSMA showing better magneto-mechanical properties than Ni-Mn-Ga alloys has been also carried out [11].
As mentioned above, such thermal treatments considerably affect the structural and magnetic properties of Ni-Mn-Ga alloys due to the modification of the atomic order.
Likewise, magnetic properties such as the saturation magnetization (MS) of the martensitic phase are also considerably affected by the quenching temperature.
The L21 atomic order variation taking place as a result of the consecution of the post-quench ordering process also affects the structural and magnetic properties of Ni-Mn-Ga alloys.
Online since: September 2012
Authors: Jun Wang, Cui Lian Che, Chuan Zhen Huang, Zhe Lv, Hong Tao Zhu
A 3D simulation on fluid field at the impact zone of abrasive water jet under different impact angles Zhe Lva, Chuanzhen Huangb , Jun Wangc, Hongtao Zhud and Cuilian Chee Center for Advanced Jet Engineering Technologies (CaJET), Key Laboratory of High-efficiency and Clean Mechanical Manufacture (Ministry of Education), School of Mechanical Engineering, Shandong University, Jinan, China, 250061 alzjslyz@126.com, bchuanzhenh@sdu.edu.cn, cjun.wang@unsw.edu.au, dhtzhu@sdu.edu.cn, echecuilian@163.com Keywords: abrasive water jet, simulation, CFD, impact angle Abstract.
Li’s research results [6] show that the incidence angle and water pressure are the main factors affecting the removal rate and surface roughness, which are the most important indicators of polishing performance.
The properties of these materials can be found in the software’s database.
Hence it may be drawn that the incoming jet velocity component perpendicular to the workpiece surface is the main influential factor on the pressure value on the impacted surface.
The maximum pressure value on the impacted surface is decreased as the impact angle varies from 90°, 60° to 25°, depending on which it can be inferred that the perpendicular velocity component of the fluid is the major influential factor of the pressure on the impacted surface.
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