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Online since: October 2015
Authors: Stefan Gaspar, Jan Pasko
The presented paper deals with the experimental assessment of the impact of increase pressure on the mechanical properties and homogeneity of a die cast.
The castings cast under pressure during solidification are characterized by better mechanical properties and by increased airtightness.
Influence of increase pressure upon the values of mechanical properties Influence of increase pressure changes on mechanical properties study was performed on experimental samples (Fig. 4 - alternator flange castings) and (Fig. 5 - testing bar taken from the gating system appointed for static tensile test).
When the experiment has been carried out constant and variable technological factors have been determined and the impact of these factors on the values of mechanical properties has been observed: Constant technological factors: plunger pressing speed: 2.6 m.s-1, liquid alloy temperature: 705°C, mold temperature: 200°C, pressing chamber diameter: 70 mm and Variable technological factors: increased pressure: 13; 22 and 25 MPa.
Pasko, Influence of technological factors of die casting on mechanical properties of castings from silumin, Lecture Notes in Electrical Engineering 240 (2013) 713-722
Online since: February 2018
Authors: Muralimohan Cheepu, S. Muthukumaran, Devuri Venkateswarulu, Devireddy Krishnaja
The friction stir welding tool is a crucial part of this welding operation accordingly, mechanical properties and microstructural characteristics of the FSW welded materials can be affected by various factors such as welding conditions, material composition, microstructures of the before and after welding, and various geometric parameters of the friction stir welded tool and the substrates [27, 28].
Mechanical Properties.
The joints are heat treated at different conditions to enhance the mechanical properties of the joints.
It has been reported that heat input generation in the welds by the tool shoulder is an important factor in FSW process, and also, the properties of the joints are strongly influenced by this factor.
Lei, Mechanical properties of underwater friction stir welded 2219 aluminum alloy, Trans.
Online since: November 2013
Authors: Pavol Hvizdoš, Sergej Hloch, Peter Monka, Dagmar Jakubéczyová, Ján Kľoc, Ján Balko
Local mechanical properties of various bone cements Pavol Hvizdoš1*, Dagmar Jakubéczyová1, Sergej Hloch2, Ján Kľoc3, Ján Balko1 and Peter Monka2 1Institute of Materials Research, Slovak Acad. of Sciences, Watsonova 47, 04353 Košice, Slovakia 2 Faculty of Manufacturing Technologies, Technical University Košice with a seat in Prešov, Bayerova 1, 080 01 Prešov, Slovakia 3 Faculty of Health Care of Prešov University, Partizánska 1, 080 01 Prešov, Slovakia aphvizdos@imr.saske.sk Keywords: Mechanical properties, bone cement, hardness, elasticity modulus.
Local mechanical properties (nano-hardness, elasticity modulus) of all experimental states were measured by nanoindentation technique and compared.
Although the mechanical properties and exothermic behaviour as well as other factors affecting their overall performance has been examined extensively, the mechanical properties of bone/bone cement interface under load bearing are not fully understood.
However, many studies [6, 7] indicate that in practice elution of antibiotics in blood and body fluids rapidly, within several hours or few days, creates channels and pores within the matrix and compromises the mechanical properties of bone cement.
Vacuum mixing lowered porosity and present doses of antibiotics did not compromise the measured mechanical properties of the freshly made samples.
Online since: November 2005
Authors: Yong Bong Lee, Sung Soo Jung, Doo Hee Lee, Su Hyun Shin
Difference in the mechanical properties observed between both methods is attributed to the presence of a metal disk attached to the non-metallic sample for electromagnetic.
The cantilever beam type specimen is usually used to determine the damping properties of the material.
As a result of the loss factor is also affected.
However, the good agreement of these properties obtained by both methods for the metallic sample ascertains the reliability and advantages of the method.
References [1] ASTM E 756, Standard test method for measuring vibration-damping properties of materials (1998) [2] ISO 6721-1, Plastics - Determination of dynamic mechanical properties, Part 1 - General principles (2001) [3] ISO 6721-3, Plastics - Determination of dynamic mechanical properties, Part 3 - Flexural vibration resonance curve method (1994) [4] M.D.
Online since: November 2012
Authors: Seiji Ban, Jiro Tsuruki, Hiroshi Kono, Yuji Okuda, Hiroyuki Arikawa, Takahito Kanie, Makoto Noda
The results showed that all the four factors statistically affected the bonding strength (p<0.01).
Introduction Zirconia is widely used in biomedical field as a material for prosthetic apparatus because of its excellent mechanical and chemical properties.
Our previous studies suggested that, core-veneer bonding is slightly related to mechanical interlocking and greatly affected by firing temperature of veneering porcelain.
Their contributions show all factors significantly affected bonding strength.
Whereas factor of veneered porcelain shows the lowest.
Online since: November 2021
Authors: Hans De Backer, Anteneh Geremew, Pieter De Winne, Tamene Adugna
The factors that are affecting the property of natural cellulose fiber in fiber-reinforced concrete [3].
The applicability of dispersed fiber in concrete production as a building material improves its entire mechanical properties in concrete [5].
Due to two main factors: Cost and availability, natural fiber-based eco composite materials are more suitable for use than biodegradable polymer materials.
Thus, the corresponding composites provide good mechanical properties.
Kumar, “Study of Mechanical Properties of Bamboo fibers before and after Alkali Treatment,” vol. 13, no. 7, pp.5251-5255, 2018
Online since: June 2012
Authors: Meng Hua Wu, Bin Miao, Wei Ping Jia
The results show that the spindle speed and voltage are mainly two factors to affect cutting depth of the workpiece.
The study applies the orthogonal experimental method to design a set of experiments, analyzes the various parameters which affects the depth of electrolysis mechanical composite cutting, and identifies the key influencing factors to summarize the laws.
When take the factors which affect cutting depth of the workpiece in the NC electrochemical-mechanical composed cutting process into deep consideration, parameters of the experiment are identified as: voltage, Electrolyte pressure, electrolyte temperature, spindle speed and electrolyte concentration.
The experiment is based on the L16 (45) orthogonal table and factors level table is shown in Table 1.
The fluctuations of the data in the figure should be the interferences of other factors.
Online since: December 2010
Authors: Shi Min Zhang, Kai Yu, Zhi Ding, Hao Miao Yang
Xiamen, Fujian, 361006, China azhangsm@zucc.edu.cn, byukai@yahoo.com.cn, cdingz@zucc.edu.cn, dyhm@qq.com Key Words: Flexible Composite Pile Foundation; FEM Analysis; Load; Settlement Abstract: The pile work on the complex properties of three-dimensional finite element analysis has been made by building-up one 4x4 soft pole.
Having studied on the factors which affect the flexibility pole compound foundation settlement factor in foundation, include the level of vertical load, elastic modulus of the pile, cushion thickness and elastic modulus.
The results show that: the impact of soft pile settlement of the factors, the level of vertical load and pile elastic modulus greater impact cushion modulus of elasticity and thickness of the less affected.
Table 1 The target of materials’ physical and mechanical properties Materials involved in the calculations Thickness or length Side resistance limits /kPa End resistance limits /kPa The ultimate bearing capacity of single pile /kN ES c MPa kPa ° Bearing platform 0.5 28000 0.2 Sand cushion 0.3 80 0.3 Flexible pile 10 300 120 0.25 The upper soil 5 28 5 12 15 0.4 The Subsoil 20 10 100 120 19 25 0.3 In the face X = 0 and Y = 0 are the symmetry constraint; direction Z is calculated as 2.5 times the depth of pile length and set to hinge constraint.
In the settlement factors about flexible pile of composite foundation, Vertical load levels and pile elastic modulus have a greater impact, elastic modulus and thickness of cushion have small impact.
Online since: September 2015
Authors: P.V. Venkitakrishnan, K. Thomas Tharian, Aby Isaac, N. Dileep Kumar
Effect of Brazing and Heat treatment cycle on the Mechanical properties of base materials N.
Thus the present work focuses on the effect of the brazing/thermal cycle on mechanical properties and microstructure of the base materials in post braze condition.
This helped in understanding the effect of brazing condition on the changes in mechanical properties of base materials.
Mechanical properties of the two materials in heat treated condition before brazing cycle Material UTS, MPa YS, MPa %El % RA ASTM grain size No.
Since all other effects remains same, grain size is only the major factor affecting the yield strength (YS) of this steel.
Online since: June 2012
Authors: Hong De Wang, Qiang Yang, Wei Cui Ding, Yong Long Gao, Shu Hua Pan
The results show that the reservoir landslide stability affected by the seepage field changes with changing reservoir level is controlled by a variety of factors, including the hydrodynamic pressure, hydrostatic pressure, uplift force, physical and mechanical properties (с, φ value change).
When the water level fluctuates at a lower rate, the pore water pressure, uplift force and physical and mechanical properties are the dominant factors.
Here are the impact factors below [4, 7].
Physico-mechanical properties changes.
But after the stability coefficient reaches the minimum, the change of physical and mechanical properties (с, φ) starts to be the dominant factor instead
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