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Online since: December 2025
Authors: Belgacem Jellali, Abdelkader Ahmadi, Mohamed Larbi Kadri
Its physico-mechanical and chemical properties are summarized in Table 1 and Table 2, respectively.
Speci- mens that are too small relative to the size of the aggregates can introduce deviations in the results, affecting the validity of the conclusions drawn.
This is crucial for its use in critical construction projects, where accurate mechanical properties are fundamental to structural safety and performance.
; Are both compositional factors relevant, or does one dominate?
Additionally, a notable improvement in mechanical properties is observed between 28 and 90 days of curing.
Online since: June 2008
Authors: Qing Li, Wei Li, Chaiy Rungsiyakull, Richard Appleyard, Michael Swain
Osseointegration that was defined as "direct structural and functional connection between ordered living bone and the surface of a load-bearing implant" [1] becomes one of the most critical factors to determine the clinical success of implantation.
Bone signifies a living tissue constantly regulating itself in response to mechanical loads by adapting its internal morphology and properties for accommodating the fundamental loading environment.
The corresponding properties such as Young's modulus and Poisson ratio were determined from values obtained from the literature [2].
More importantly, the study revealed that the particle size of fully porous coating also appreciably affected the remodeling capability by assessing the minimum effective strain (MES).
[10] Carter, D.R., Mechanical Loading Histories and Cortical Bone Remodeling.
Online since: December 2007
Authors: Hong Tsu Young, Wei Yen Lin
3D Micro-scale Profile Measuring System Hong-Tsu Young1, a and Wei Yen Lin 2,b 1 Professor, Department of Mechanical Engineering, National Taiwan University 2 PhD Candidate, Department of Mechanical Engineering, National Taiwan University a hyoung@ntu.edu.tw, bd93522009@ntu.edu.tw Keywords: 3D non-contact Measurement, Image Processing, Focus Algorithm.
The properties of images were enhanced by image processing techniques including discrete Gaussian filtering, histogram equalization and high-boost filtering.
Specifications of video capture card Manufacturer Euresys Type PICOLO Working Voltage 1V Image Input RS170 PCI 32 bits, 33 MHz Analysis of measuring precisions In this research, we analyzed 3 factors which affect the precisions of the measurement: Roughness, Algorithm and stability.
Fig.9 Distribution of focus degree with roughness Fig.10 Focus Degree and different algorithm Stable Factor.We used a white rectangle with one of its corner located on a specified pixel.
During the measuring process, some factors, like insufficient strength of light source, and vibration, were found leading to poor-quality (much noise or vague features) images.
Online since: December 2013
Authors: Liang Dong, Chao Yu Zhou, Cheng Xin Lin, Si Ying Chen
Single factor experiment was used in this study.
Nowadays laser welding is widely used because of its advantages such as high power density, deep penetration, high-precision, adaptability, small heat-affected zone and residual stress.
Zeng, Study on microstructure and mechanical properties of 304 stainless steel joints by TIG, laser and laser-TIG hybrid welding, Opt Laser Eng. 48 (2010) 512-517
Zhang, Residual stress, micro-hardness and tensile properties of ANSI 304 stainless steel thick sheet by fiber laser welding,  Mat Sci Eng A-Struct. 561 (2013) 136-144
Zhong, Effects of laser shock processing with different shocked paths on mechanical properties of laser welded ANSI 304 stainless steel joint, Mat Sci Eng A-Struct. 528 (2011) 4652- 4657.
Online since: August 2019
Authors: Yanina Andriievska, Svetlana Romanenko
After reviewing the many reinforcement schemes, their inadequacies include the impossibility of efficiently unloading the compressed zone of the beam concrete, which significantly affects the stiffness and bearing capacity.
As a result of the experiments, the physical and mechanical properties of concrete and reinforcement are discovered and, based on the obtained results, their final class is determined.
Introduction The main task of construction is providing buildings with the property to remain operable throughout the entire life cycle.
The level of bearing capacity, both of individual structures and buildings as a whole, depends on many factors.
To obtain real physical and mechanical characteristics of materials, samples of reinforcement are selected and concrete samples are formed.
Online since: October 2010
Authors: Li Fa Han, Sheng Guan Qu, Shou Yan Zhong, Chun Xiao Xie
Frictional Characteristics of Tool and Material in Turning Particulate Reinforced Iron-based Composites Lifa HAN 1,a, Shengguan QU 2,b, Shouyan ZHONG1,c , Chunxiao XIE1,d 1 College of Mechanical Engineering, Dongguan University of Technology, Dongguan, China 2 College of Mechanical Engineering, South China University of Technology, Guangzhou, China a tonyhan98@21cn.com , b Qusg@scut.edu.cn, cszhongy@263.net, dchun-xiao@163.com Keywords: Friction, Iron-based composites, Turning, Coated carbide tool Abstract.
Although iron-based composites have many excellent properties, the machining of such materials faces serious challenges[7-9].
Due to the influence of reinforcing particulates, pores and oxide impurities in matrix, serious tool wear will happen in short period of time, which causes adverse affect on machining quality.
As the frictional status between tool and workpiece materials strongly affects the tool wear, sequentially affects the machining accuracy and surface integrity, therefore, the frictional characteristics of cutting tool and workpiece should be paid great attention in machining iron-based composites.
Among these two contributing factors, the scraping of hard particulates on the tool is dominant, thus, the average tool-chip friction coefficient (µav) increases with the increase in NbC mass fraction.
Online since: January 2009
Authors: Andrzej Kotnarowski
Selective Transfer Phenomenon in Copper-Steel Tribological Systems Andrzej Kotnarowski1, a 1 Department of Mechanical Engineering, Radom Technical University al.
In this layer, the elastic-plastic deformations generated during friction process act under the principle of a diffusion-vacancy mechanism, don not affecting deeper zones of cooperating elements surface layers.
To identify real factors influencing µ (p) characteristics subsequent investigations should be carried out concerning mainly surface layer composition.
Marczak: Garkunov effect in mechanical engineering.
Kotnarowski: Influence of differences in copper chemical content o its tribological properties.
Online since: September 2015
Authors: Akira Ueno, Shoichi Kikuchi, Taku Miura, Takayuki Sakakibara, Takanori Kuno, Tatsuo Sakai
In order to realize the long-term durability of those mechanical structures, fatigue properties of the respective components should be clarified in very high cycle regime.
Mechanical properties of respective series are shown in Table 2.
Mechanical properties Fig. 1 Shape and dimensions of fatigue specimen polishing, shot-peening and electrochemical-polishing pre-treated with shot-peening.
Referring to both S-N diagrams, it is indicated that hardness, residual stress and surface roughness do not affect significantly the S-N properties of SWOSC-V steel in the very high cycle regime.
Peterson, Stress Concentration Design Factors, John Wiley & Sons, Inc., New York, (1962), p.50
Online since: September 2019
Authors: Veronika Păltânea, Horia Gavrila, Veronica Manescu Paltanea, Iosif Vasile Nemoianu
Some other important additional properties of the non-oriented silicon iron alloys (FeSi NO) are high electrical resistivity, increased through coating operation (e.g., using varnish, oxide surface, enamel, or non-metallic substances as phosphate), corrosion resistance, very good blanking and weldability properties, mechanical strength and a constant thickness, all over the steel sheet plane.
The geometrical and material properties are provided in Table 1.
Properties and geometrical dimensions of the investigated samples.
In order to analyze the magnetic properties, the loss separation theory was applied.
These factors lead to a decrease of the first anisotropy constant and of the saturation magnetic polarization as well as to an increase of the electrical resistivity [1].
Online since: January 2014
Authors: Shuang Liang, Ming Gao, Shao Jun Wang, Lian Zhen Zhang
In fact, economic, technology and the different practical conditions is difficult to be the architect master, so the local construction technical level, economic conditions and other factors should be the design variables controllable architect design.
Impact factor for assembling building products have assembly units, assembly process and assembly resources and so on.
There are many internal factors, Such as material properties, scale, quantity and installation program.
As a symbol of a space object, the tower structure is a complex matrix composed of many invisible base of intrinsic factors.
Journal of Mechanical Design.1999(3):26~28
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