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Online since: May 2023
Authors: Ariel Conversion, Jeremias Gonzaga, Aristotle T. Ubando
These FEA studies aim to evaluate the warpage of FOWLP for various manufacturing processes and identify influencing factors.
Materials and Methods Fan-out wafer-level package geometry and material properties.
Table 1 shows all the thermo-mechanical material properties necessary for the FEA simulation in ANSYS software.
Thermo-mechanical properties of FOWLP materials [5].
Dimagiba, Finite element analysis on the factors affecting die crack propagation in BGA under thermo-mechanical loading, Engineering Failure Analysis 116 (2020).
Materials and Methods Fan-out wafer-level package geometry and material properties.
Table 1 shows all the thermo-mechanical material properties necessary for the FEA simulation in ANSYS software.
Thermo-mechanical properties of FOWLP materials [5].
Dimagiba, Finite element analysis on the factors affecting die crack propagation in BGA under thermo-mechanical loading, Engineering Failure Analysis 116 (2020).
Online since: August 2012
Authors: Vicente Amigó, Concepción Tojal, F. Devesa, J.J. Candel
Materials obtained by using of two spacers, have been analyzed in order to value different results in porosity, microstructural and mechanical properties.
One of the most common is in the field of biomedicine, which is well-known to be a biocompatible material with good corrosion properties and appropriate mechanical properties [1].
Mechanical properties and elastic modulus of porous materials has been characterized.
The mechanical properties depend on porosity, decreasing when porosity increases [13].
Ashby: Cellular Solids: Structure and Properties.
One of the most common is in the field of biomedicine, which is well-known to be a biocompatible material with good corrosion properties and appropriate mechanical properties [1].
Mechanical properties and elastic modulus of porous materials has been characterized.
The mechanical properties depend on porosity, decreasing when porosity increases [13].
Ashby: Cellular Solids: Structure and Properties.
Online since: December 2006
Authors: Woon Hyung Baek, Moon Hee Hong, Eun Pyo Kim, Joon Woong Noh, Seong Lee, Sung Ho Lee, Heung Sub Song
This paper focuses on the variations of static and dynamic properties of tungsten heavy
alloy with heat treatment.
Introduction Tungsten heavy alloys consist of strong tungsten particles and ductile matrix phases so that they are useful for the components requiring high densities and mechanical properties, such as counter weight balance, radiation shield and kinetic energy projectile.
Due to composite structure, mechanical properties of tungsten heavy alloys are strongly dependent upon the various factors, especially, impurity level, relative amount and morphology of phase boundaries so-called W/W and W/matrix interfaces.
Since heat treatment is one of the most effective ways to modify those factors, many investigations [1-7] have been focused on improving mechanical properties by heat treatment.
Compared to intensive researches on W/matrix interfaces, there are only a few investigations [8-9] on the relationship between heat treatment and W/W grain boundaries, which affects eventually mechanical properties.
Introduction Tungsten heavy alloys consist of strong tungsten particles and ductile matrix phases so that they are useful for the components requiring high densities and mechanical properties, such as counter weight balance, radiation shield and kinetic energy projectile.
Due to composite structure, mechanical properties of tungsten heavy alloys are strongly dependent upon the various factors, especially, impurity level, relative amount and morphology of phase boundaries so-called W/W and W/matrix interfaces.
Since heat treatment is one of the most effective ways to modify those factors, many investigations [1-7] have been focused on improving mechanical properties by heat treatment.
Compared to intensive researches on W/matrix interfaces, there are only a few investigations [8-9] on the relationship between heat treatment and W/W grain boundaries, which affects eventually mechanical properties.
Online since: April 2012
Authors: Fei Han, Gao Yong Lin, Da Shu Peng, Qian Li, Rui Fen Long, Qing Zhou
By studying the deformation processing and mechanism of 304 austenitic stainless steel sheets which are under the external stress, the influences of internal and external factors on its deformation could be understood, which is also necessary for developing plastic processing to analyze and control the workpiece quality.
And it was important for understanding the material mechanical properties, using them reasonably and exploring its potential applications.
In order to thoroughly discuss the organization, the structure and the properties’ changes of 304 austenitic stainless steel caused by deformation, the following approaches were taken: samples were pre-stretched to different deformation (15%, 25%, 40%, 60%) at the speed of 3mm/min in the LJ-5000A mechanical tensile testing machine, and then unloaded; the taking samples in various conditions for metallographic analysis, transmission electron microscopy and mechanical properties analysis, etc.
Researches on work hardening of 304 austenitic stainless steel sheets Influence of cold working on the properties of 304 austenitic stainless steel.
The influence of pre-processing deformation degree on the mechanical properties of the sample are shown in Fig.2.
And it was important for understanding the material mechanical properties, using them reasonably and exploring its potential applications.
In order to thoroughly discuss the organization, the structure and the properties’ changes of 304 austenitic stainless steel caused by deformation, the following approaches were taken: samples were pre-stretched to different deformation (15%, 25%, 40%, 60%) at the speed of 3mm/min in the LJ-5000A mechanical tensile testing machine, and then unloaded; the taking samples in various conditions for metallographic analysis, transmission electron microscopy and mechanical properties analysis, etc.
Researches on work hardening of 304 austenitic stainless steel sheets Influence of cold working on the properties of 304 austenitic stainless steel.
The influence of pre-processing deformation degree on the mechanical properties of the sample are shown in Fig.2.
Online since: January 2015
Authors: Jing Hai Zhou, Yun Cong Shu, Qing Zhe Lin
Introduction
The main mechanical properties of waste fiber recycled concrete specimens are affected by fiber length, replacement rate of recycled aggregate, the amount of fiber volume and many other factors.
Fig.1 Steel rebar stress cloud Fig.2 Concrete destruction cloud When replacement rate of recycled aggregate is 50% and the eccentricity is 60mm,for specimen Z-60-1, 2, 3 and specimen Z-60-2, 4, 5, the waste fiber length and the amount of waste fiber affect concrete strain of waste fiber recycled concrete column.
Experimental research on mechanical properties of the waste fiber recycled concrete [J] .Concrete 2013, 3); 2-3 [5] ABAQUS Analysis Users Manual ABAQUS Inc , 2006 [6] Wang Li, Deng Sihua.
Fig.1 Steel rebar stress cloud Fig.2 Concrete destruction cloud When replacement rate of recycled aggregate is 50% and the eccentricity is 60mm,for specimen Z-60-1, 2, 3 and specimen Z-60-2, 4, 5, the waste fiber length and the amount of waste fiber affect concrete strain of waste fiber recycled concrete column.
Experimental research on mechanical properties of the waste fiber recycled concrete [J] .Concrete 2013, 3); 2-3 [5] ABAQUS Analysis Users Manual ABAQUS Inc , 2006 [6] Wang Li, Deng Sihua.
Online since: August 2013
Authors: Ľudmila Dulebová, Branislav Duleba, Janusz W. Sikora, František Greškovič
Therefore, the most important properties are selected in terms of shape, size and the accuracy of mouldings and in terms of the size of the production batch.
Required surface properties of forms include surface quality, corrosion resistance, fatigue resistance, wear resistance, the ability to easily remove mouldings, and a reduced tendency to create sediments in the form.
The conditions affecting wear are as follows: § External conditions include the working environment (temperature, pressure, chemical activity),the working medium (flow rate, particle content, hardness, shape and the numbers of particles, and the conditions of impact on surface),and the dynamic loading of functional surface
The material properties of Ultradur B430 G4 (20% of glass filler) are as follows: density 1,45 g/cm3, yield strength 120 MPa, Water Absorption 0.4 %, Melt Flow 20.3 g/10 min.
Summary This paper presents the results of the tribological properties of selected types of tool steels.
Required surface properties of forms include surface quality, corrosion resistance, fatigue resistance, wear resistance, the ability to easily remove mouldings, and a reduced tendency to create sediments in the form.
The conditions affecting wear are as follows: § External conditions include the working environment (temperature, pressure, chemical activity),the working medium (flow rate, particle content, hardness, shape and the numbers of particles, and the conditions of impact on surface),and the dynamic loading of functional surface
The material properties of Ultradur B430 G4 (20% of glass filler) are as follows: density 1,45 g/cm3, yield strength 120 MPa, Water Absorption 0.4 %, Melt Flow 20.3 g/10 min.
Summary This paper presents the results of the tribological properties of selected types of tool steels.
Online since: April 2013
Authors: Guang Hua Yin, Jian Gu, Zuo Xin Liu, Yi Sun, Liang Hao, Pei Fei Cong, Yang Ming
The domestic and foreign scholars had done a lot of research for the study of the use of saline-alkali soil improver, which founded that the Soil amendment can improve soil properties to a certain extent, reduce soil salinity and pH [3-5], but it just played a role on the surface soil, did not prevent the salt gathered a large number to the surface that results from the increase in shallow groundwater, soil evaporation and other factors, which seriously affected the growth and yield of crops, thus weakening the effect of the modifier [6-7].
It becomes one of the major obstacles restricting factors in the area of agricultural development [10].
Factor Effect Analysis The main factor effects analysis The direction of the impact on yield by the two factors can be seen from the positive and negative of time coefficient of the regression equation.
With both the amount of the two factors increased, the trends increased in corn production.
Effects of Soil Combination Amendments of Gypsum and Natural Organic Matter on Chemical and Physical Properties of Salinized Fluvo-aquic Soil and Maize Yield[J].
It becomes one of the major obstacles restricting factors in the area of agricultural development [10].
Factor Effect Analysis The main factor effects analysis The direction of the impact on yield by the two factors can be seen from the positive and negative of time coefficient of the regression equation.
With both the amount of the two factors increased, the trends increased in corn production.
Effects of Soil Combination Amendments of Gypsum and Natural Organic Matter on Chemical and Physical Properties of Salinized Fluvo-aquic Soil and Maize Yield[J].
Online since: June 2010
Authors: Rimantas Stonkus, Mindaugas Kazimieras Leonavičius
Analysis of the microstructure of welded joints, indexes of mechanical properties are
provided and failure mechanism in the area of fatigue and static fracture is analyzed.
Welding efficiency and quality depends on many factors and often welded joint strength and longevity vary from designed.
The structures of materials and welds, as well as their mechanical properties, were determined.
Peculiarities of microstructure influence properties of resistance to the cyclic loading.
A particular intermediate area still exists which depends on various factors.
Welding efficiency and quality depends on many factors and often welded joint strength and longevity vary from designed.
The structures of materials and welds, as well as their mechanical properties, were determined.
Peculiarities of microstructure influence properties of resistance to the cyclic loading.
A particular intermediate area still exists which depends on various factors.
Online since: July 2014
Authors: Xiao Wei Dai, Yu Zhen Xie, Zhao Gang Wang
Practice shows that the type of kernel function, kernel parameters, and penalty factor is one of the key factors affecting the performance of the SVM, so research SVM parameter selection method for support vector machine development has a very important practical significance.
For a given set of observations:, optimal decision function can be constructed in a high -dimensional feature space: (1) Where w and b are regression factors, which can be gained by minimizing the following regularized risk function (2) Among them, control model complexity, C is the penalty factor to control the degree of experience in risk of punishment; is error control function, error control function commonly used linear loss function, quadratic loss function, select a different loss function can be constructed in different forms of support vector machines.
After a given training set and selected kernel function parameters that affect the performance of SVM main penalty factor and nuclear parameters.
Using support vector machine to predict, to select parameters is important, if the parameter is selected unreasonable, it may result in the calculation of under- and over- learning phenomena, which directly affect the prediction accuracy.
Journal of Mechanical Strength, 2008, 30(3):349-353
For a given set of observations:, optimal decision function can be constructed in a high -dimensional feature space: (1) Where w and b are regression factors, which can be gained by minimizing the following regularized risk function (2) Among them, control model complexity, C is the penalty factor to control the degree of experience in risk of punishment; is error control function, error control function commonly used linear loss function, quadratic loss function, select a different loss function can be constructed in different forms of support vector machines.
After a given training set and selected kernel function parameters that affect the performance of SVM main penalty factor and nuclear parameters.
Using support vector machine to predict, to select parameters is important, if the parameter is selected unreasonable, it may result in the calculation of under- and over- learning phenomena, which directly affect the prediction accuracy.
Journal of Mechanical Strength, 2008, 30(3):349-353
Online since: May 2016
Authors: Wang Hui, Pei Quan Guo, Yang Qiao, Jin Tao Niu
When the alloy temperature range of 650-750℃, it also has excellent mechanical properties.
Table 2 and table 3 respectively FGH97 chemical compositions and physical and mechanical properties.
High speed steel tools have good comprehensive mechanical properties, the material hardness is above 63HRC (some even up to 70HRC) by heating treatment.
As actual application, drilling performance just a considered of factor, the more important of factors are cost and economic.
When studying on drilling of Ni-based powder metallurgy superalloys, we may increase αf and 2Φ as empirical formula of drilling factors.
Table 2 and table 3 respectively FGH97 chemical compositions and physical and mechanical properties.
High speed steel tools have good comprehensive mechanical properties, the material hardness is above 63HRC (some even up to 70HRC) by heating treatment.
As actual application, drilling performance just a considered of factor, the more important of factors are cost and economic.
When studying on drilling of Ni-based powder metallurgy superalloys, we may increase αf and 2Φ as empirical formula of drilling factors.