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Online since: November 2023
Authors: Frank Walther, Lars Andree Lingnau
A commercial design is usually based on mechanical material properties and additional safety factors.
Introduction The mechanical properties of industrially used components are significantly influenced by the forming process.
Similarly, there have been no studies of temperature influence or frequency influence affecting fatigue properties of the forward rod extruded components in this context.
Fig. 3. a) Load type-dependent and b) frequency-dependent fatigue properties for a shoulder opening angle of 2a = 30°.
Höppel, Cyclic deformation and fatigue properties 435 of very fine-grained metals and alloys.
Online since: October 2013
Authors: Kimmo Hämäläinen, Irina Turku, Timo Kärki
The properties of the WF/PP-shell composite were highly affected by the WF particle size.
The properties of co-extruded composites are affected by the composition of the layers, the thickness of the outer layer and the manufacturing conditions.
The properties of fibre-reinforced composites in general depend on various factors, such as fibre size, interfacial adhesion between fibre and matrix, stress transfer efficiency through the interface, volume fraction of fibre, aspect ratio of fibre and orientation of fibre [7].
Result and Discussion Tensile properties The effects of different cellulosic fibres in the shell layer on the mechanical properties of the co-extruded composites are summarized in Table 2.
These factors lead to agglomeration through interference of cohesive forces instead of dispersion.
Online since: January 2012
Authors: Zuzanka Trojanová, Peter Palček, D. Blažek, Jakub Porubčan
Introduction Magnesium alloys are attractive for the industry because of their interesting mechanical properties, such low density (2/3 of aluminum density and 1/4 of steel density).
Mg alloys have also excellent internal friction properties (belong to the group of HIDAMET materials).
Heat treatments have a strong impact on the mechanical properties [1, 2].
Mechanical cycling can be performed during the measurements and it is possible to study the changes in the material properties as a function of time.
Conclusions The obtained results lead to conclude that the most important factor affecting the mechanical properties of magnesium alloys are dislocations and their interactions with solute atoms.
Online since: August 2009
Authors: N. Papaka, N. Pongsathornviwa, C. Sripetdee, Chanchai Thongpin, Narongrit Sombatsompop
The Effect of Second Filler on Cure Characteristic and Mechanical Properties of Si-69 treated Precipitate Silica/NR Composite C.
Cure characteristic and mechanical properties of the rubber compound and rubber vulcanizate were affected both by filler-rubber interaction and filler-filler interaction.
[1,6] studied the effect of various types of FA, available in Thailand, on both curing and mechanical properties.
In terms of mechanical properties of the vulcanizates, modulus at 100 % elongation was not much affected by the addition of FA compared to that of fumed silica used as filler.
Particles dispersion, crosslink density and reinforcement effect are the factors governing vulcanizates properties even so the present of fly ash was not much effect mechanical properties the composite.
Online since: April 2015
Authors: N.V. Martyushev, Sergei Yu. Tarasov, Anton Viktorovich Korchmit, Olga S. Kvashnina
Structure and Properties of Multicomponent Tin Leaded Bronzes upon Die-casting Depending on Pouring Temperature Anton V.
This work presents the characteristic properties of powdered materials sintering under conditions of liquid-phase sintering.
The structure and properties of tin bronze casts are affected by a set of technological factors such as pouring temperature (heat content of the melt), heat storage capacity of the mould (cooling rate), rotational speed of a casting mould (in centrifugal casting), rate of pouring the melt into a mould, mould temperature, and some others.
The mechanical properties have been determined by a modern testing machine MIRI-100K with a computerized control and analysis of mechanical parameters [3-6].
Thus, pouring temperature is an important factor affecting the formation of the multicomponent tin leaded bronze (with zinc and nickel content) structure and eventually determining its properties.
Online since: October 2011
Authors: Li Na Yu, Kazutoshi Nishimoto, Masato Sasa, Kenta Ohnishi, Masashi Kameyama, Shinro Hirano, Naoki Chigusa, Kazuyoshi Saida, Masahito Mochizuki
Introduction Pressure vessels are in general fabricated from steels with excellent mechanical properties.
However, the excellent mechanical properties of the base metal will be altered by the thermal cycles imposed by welding processes, and the loss in toughness always occurs in the heat affected zone (HAZ) of the welds [1].
Among these, CGHAZ always has poor mechanical properties due to the increase in hardness and loss of toughness [1,2,5].
Therefore tempering is required to improve the mechanical properties.
Definition and technique of temper bead welding The ASME Boiler and Pressure Vessel code defines temper bead welding as follows: “A weld bead placed at a specific location in or at the surface of a weld for the purpose of affecting the metallurgical properties of the heat affected zone or previously deposited weld metal”.
Online since: October 2007
Authors: Je Sik Shin, Bong Hwan Kim, Sang Mok Lee, B.M. Moon
Therefore, the lifetime of mill balls is the most important factors to determine productivity and efficiency in the pulverization process.
After the adequate alloy design without Mo, the Taguchi and RSM analyses were utilized for obtaining an exact understanding of the effects of heat treatment parameters on the mechanical properties such as hardness and toughness, leading to the optimization of heat treatment.
Taguchi and RSM methods [2], which remarkably reduce the extents of experiments, were applied for statistical and quantitative analysis of the effect of the heat treatment parameters on mechanical properties and for optimization of the parameters.
Destabilization temperature and time, and tempering temperature and time were selected as heat treatment process parameters (factors).
The levels of the factors were selected based on the heat-treating parameters presently adapted at high-Cr white cast iron foundries, as given in Table 1.
Online since: November 2014
Authors: Ling Feng Li, Lu Hui Yan, Yu Wu Zhang
ahaochidehj94@163.com Keywords: concrete; cryogenic temperature; temperature field test; numerical simulation Abstract: The mechanical properties of concrete under cryogenic temperature (-165℃) are affected by the temperature field inside the concrete.
According to the present researches, the mechanical properties of the concrete under cryogenic temperature are not only affected by the moisture content but also by the temperature inside the concrete.
(2) According to heat transfer law, the main factors affecting the temperature field are thermal conductivity (λ) and specific heat capacity (C).
Miura, Mechanical properties of concrete at very low temperatures, Proceedings of 21st Japan Congress on Materials Research (Japan, 1978), The Society of Materials Science: 157-159
Liu: Test research in mechanical properties of concrete under low temperature (M.S.
Online since: April 2014
Authors: Wen Bin Sun, Hong Bao Yong, Qiang Qiang Zhu, Jing Zhao
The performance of the interface between FRP and masonry is one of the key factors affecting the behavior of the strengthened structure.
And the performance of the interface between FRP and masonry is one of the key factors affecting the behavior of the strengthened structure.
GFRP prefabricated material properties were Table 2.
The material properties of the adhesive are shown in Table 3.
Summary The performance of the interface between FRP and masonry is one of the key factors affecting the behavior of the strengthened structure.
Online since: January 2012
Authors: Ping Han, Wan Jiang Wu, Chuang Liu, Jia Yao, Wei Lu
Production Process and Nondestructive Testing of Soybean stalks Particleboard Wei Lu, Jia Yaoa, Ping Han, Wanjiang Wu, Chuang Liu College of Mechanical Engineering, Jiamusi University, Jiamusi, 154007, China a jiahuiyuyao@163.com (corresponding author) Keywords: Soybean stalks particleboard, Orthogonal experiment, NDT(nondestructive testing), Process parameter Abstract: Orthogonal experiment of four factor and three level has been adopted, through the process analysis of the various factors on mechanical properties, the best process conditions of soybean stalks particleboard are chosen as: density is 0.7g/cm3, glue content is 12%, and hot pressing time distribution is 3+4 minutes, hot pressing temperature is 175℃.
In order to use them properly, we must not only grasp their production process, but need to understand its material quality, particularly mechanical properties.
Through the influence factors analysis on the performance, the optimum process parameters was achieved.
Orthogonal experiment was adopted, the factors and levels of experiment were shown in Table 1.
Therefore, the density requirement can meet the standard physical properties requirements was OK, from consideration of economic benefits, 0.7 g/cm3 was the best density of the particleboard.
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