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Online since: January 2016
Authors: Andrejs Sergejevs, Janis Ozolins, Eriks Gerins, Artis Kromanis
Castings of tin bronzes are widely used in engineering due to good mechanical and casting properties.
Mechanical properties and chemical composition of CuSn5ZnPb2-C.
Mechanical properties and chemical composition of CuSn12-C.
Mechanical properties and chemical composition of CuSn7Zn4Pb7.
Conclusions It was found that the casting velocity does not affect the mechanical properties of the tin bronzes, which contain a small amount of lead as in the case of bronze alloy CuSn12 and bronze alloy CuSn5Zn5Pb2 with a high zinc content.
Online since: February 2012
Authors: Zhong Wei Wu, Lei Shi, Kai Zhao, Zhi Feng Liu
This article proposes a recycling technology of waste thermosetting phenolic resin based on mechanical and physical method, analyzes experimental factors on degradation effect of thermosetting phenolic resin by orthogonal test , and to select the optimal technology parameters.
The orthogonal test program which has a total of nine tests is L9(34) by factors and levels ,and table .1 shows orthogonal head design[5].
Various factors differently affect degradation effect of thermosetting phenolic resin,and the primary and secondary order is A>D>B>C.Speed A has a certain impact on experimental result while feeding particle size D,time B is limited, feeding material weight C hardly has significant impact.
(2)Mechanical and physical effects not only change the physical properties and morphology of thermosetting phenolic resin which material forms new surface and particle becomes tiny,but also change the molecular structure and chemical properties of thermosetting phenolic resin which molecular chain is broken, the activity of functional groups is increased and the cross-linked structures is destroyed .So thermosetting phenolic resin that is degraded restores the ability of a certain reversible plasticity
(3) The primary and secondary order of four factors on degradation effect of thermosetting phenolic resin is A>D>B>C.
Online since: November 2021
Authors: Dawid Szyba
The properties of the material affect the quality of the manufactured product.
Unfortunately, this often leads to disappointment as the device rarely behaves as it was designed to because the material properties of interest are affected by the microstructure of the materials.
Effect of materials properties on engineering design Performance of product is limited by material properties.
Properties of Materials Microstructure influence most of the material properties.
Material Factors Material properties influence design and planning for micro-manufacturing, compared to that in macro-manufacturing, which, for example, is reflected in the following aspects [5]: · Influence of the size effects on mechanical, thermal, electrical and magnetic properties, biocompatibility and chemical compatibility, hydrophile and hydrophobe properties, etc. need to be understood, and some of these may be significantly different, compared to the material behaviors in the macro-scale, · In the consequence to above parameters, mechanisms of material conversion processes (separation, deformation, joining/deposition chemically and physically) will be different or affected, as well as interactions between the materials and processing tools (for tool-based processes), · In hence of the above, selection of the means for enabling material convention processes will be affected, the considerations including effectiveness and efficiency and effects on the material properties of
Online since: October 2015
Authors: Salma Barboura, Jugurtha Meddour, Mohammed Haboussi, Mouhand Said Kachi, Laurent Royon
For this aim, Eshelby [4] based mean-field homogenization models provide a very cost-effective way of predicting the influence of the microstructure (thermo-mechanical properties of each phase; inclusions volume fraction, aspect ratio and orientation) on the overall properties.
Heterogeneities are classified in n families of identical inclusions according to their thermo-mechanical behaviors and their geometrical properties.
Homogenized mechanical properties.
The effective mechanical properties of mortar are weakened by the incorporated PCM particles.
The orientation of MCP particles in the mortar can affect slightly the mechanical and thermal properties.
Online since: March 2013
Authors: Xue Juan Zhang, Liu Yong, Xu Feng
The main factors affecting the quality of electrolytic grinding The quality of electrolytic grinding is mainly determined by two factors: surface roughness and the shape and position errors.
The main factors affection the surface roughness is: (1) the electrolysis factors, which include operating voltage, current density, electrolyte and so on. (2) mechanical factors, which include particle size and hardness of the abrasive, grinding pressure and so on.
Material properties of work piece, machine tool precision and machining parameters also affect the surface roughness factors.
Establishment head parameter model shown in Figure 3; Figure 3 Head parametric model Step 2: Set the material properties of the work piece model.
Conclusion For electrolytic grinding, the main factors affect the quality is the grinding force.
Online since: May 2020
Authors: Li Hua Chai, Zi Yong Chen, Zhi Lei Xiang, Wei Min Ren
Microstructure and Properties of Rapidly Solidified Al-Zn-Mg-Cu Alloy Weimin Rena, Ziyong Chenb*, Zhilei Xiangc, Lihua Chaid College of Materials Science and Engineering, Beijing University of Technology, Beijing 100124, China arwm0102@163.com, b*S201709096@emails.bjut.edu.cn, c2670545227@qq.com, dlhchai@bjut.edu.cn Keywords: Rapid solidification, Al-Zn-Mg-Cu alloy, Microstructure, Mechanical properties Abstract.
Refining grain plays an important role in improving the mechanical properties of aluminum alloys.
The results show that the roller speed was an important parameters affecting the formability of the alloy.
Conclusions (1) A roller speed is an important factor affecting the ability of the fast-setting strip to form a belt.
Effects of Mg and Cu on microstructures and properties of spray-deposited Al-Zn-Mg-Cu alloys [J].
Online since: October 2010
Authors: Qian Zhu, Feng Lan Li
Based on the studies of ordinary concrete, the drying shrinkage are affected by many factors such as cement type and content, water to cement ratio, aggregate type and content, and curing environmental condition et al [1, 2].
The ordinary silicate cement of grade 42.5 with qualified stability and the proto -machine-made sand crushed from limestone are used with properties listed in Table 1 and Table 2.
The crushed limestone in series of 5 mm-10 mm and 10 mm-25 mm is mixed in proportion 1:1 with physical and mechanical properties shown in Table 3.
Table 1 Physical and mechanical properties of cement Grade fineness (%) Water content of standard density (%) Setting time (min) ft (MPa) fc (MPa) Initial Final 3d 28d 3d 28d 42.5 2.8 26.9 257 316 4.7 8.7 23.3 47.7 Table 2 Physical properties of proto-machine-made sand Fineness modulus Apparent density (kg/m3) Methylene blue value (g/kg) Stone powder content (%) 3.19 2740 0.25 5.0 Table 3 Physical and mechanical properties of crushed stone Apparent density (kg/m3) Pile-up density (kg/m3) Crushed index (%) Mud content (%) Content of needle –pieces (%) 2765 1498 8.8 0.5 4.0 Mix Proportion of Concrete.
Analyses of Test Results Shrinkage affected by stone powder content.
Online since: October 2012
Authors: Guo Ping Zhang
Mechanical properties of ECAP materials Strength and plasticity of the ECAP material Among tests of the mechanical properties of ultra-fine grain materials, the tensile test is the most frequently conducted.
General metal and alloy material is difficult to own both of the two mechanical properties,and several ultra-fine grain materials have the mix of these two mechanical properties in materials science research in recent years.
After long-term and a large amount of research, the researchers found that there are a variety of factors which affect the fatigue strength and fatigue life.
The main factors are the following aspects: Firstly, affected by the parts working conditions, these influencing factors mainly are four aspects including load characteristics, load frequency, the service temperature and environmental media ; Secondly, affected by the parts and materials essential factors, these influencing factors mainly are four aspects including chemical composition, metallography microstructure, fiber orientation and internal distribution of defects; Thirdly, affected by the parts-state, these influencing factors mainly are five aspects including the gap effect, surface roughness, parts heat treatment, residual stress and residual strain .
Since there is a variety of factors which affect the materials fatigue properties, there are not an effective methods and techniques to avoid and reduce the hazards of these factors on the material lifetime so far yet.
Online since: June 2012
Authors: Bao Sheng Yang, Shi Hua Song
STUDY ON THE FACTORS AFFECTING THE ANTI-SEISMIC PERFORMANCE OF STEEL REINFORCED HIGH-STRENGTH CONCRETE COLUMNS Baosheng Yang1, a, Shihua Song2 1 Inner Mongolia university of science & technology, China 2 Baotou iron and steel (Group) limited liability company, China ayangbs-tj@126.com Keywords: Steel reinforced high-strength concrete, column, axial load coefficient Abstract.
Axial load coefficient is an important indicator affecting the anti-seismic performance of SRHC column and many domestic scholars have undertaken varying degrees of research on it, but most research are about SRC columns equipped with I-beams and few research are carried out on SRHC column or on SRC columns equipped with cruciform steel bones.
In view of this, this study is focused on the anti-seismic performance of reinforced high strength concrete columns based on test results and it analyzes the effects of factors such as axial load coefficient, volume stirrup rate and the steel reinforced form on the anti-seismic performance of steel reinforced high strength concrete columns.
The experiments under the low cyclic horizontal loads show that, axial load coefficient and steel reinforced form are the decisive factors affecting the anti-seismic performance of steel reinforced high strength concrete columns and the stirrup ratio also have some impact on the performance of steel reinforced concrete columns.
Summary on Studies of the Mechanical Properties of Steel Reinforced Concrete Structures.
Online since: May 2022
Authors: Victor Tochukwu Ibeabuchi, Clifford Ugochukwu Nwoji, Chizoo Esonye
The reduction in the mechanical properties (compressive strength) of structural concrete after an exposure to high temperatures has been studied since the last century.
Pillai, Mechanical properties and durability performance of concretes with Limestone Calcined Clay Cement (LC3 ).
Lee , Mechanical Properties of Concrete depending on Cooling Conditions After High Temperature Heating.
Mechanical properties of concrete composites subject to elevated temperature.
Song, Impact of high-temperature-water cooling damage on the mechanical properties of concrete.
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