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Online since: December 2012
Authors: Cui Xin Chen, Hui Fen Peng, Pu Zhao, Yuan Yuan Li, Liang Yan
Aimed at improving mechanical properties of high strength low alloy steel welds, oxides with high melting point and high stability were added into steel liquid.
The presence of inclusions may degrade some of the material properties for high strength low alloy steel welds.
However, an innovative concept has arisen recently in which non-metallic inclusions can be utilized to enhance the properties of steel products.
So, large attention has been paid on the effect of inclusion on welds mechanical performance.
A great quantity of fine and interlocked acicular ferrite can be obtained in weld metal which make the harmful inclusion become a favorable factor to improve microstructure and propertied of steel weld.
The presence of inclusions may degrade some of the material properties for high strength low alloy steel welds.
However, an innovative concept has arisen recently in which non-metallic inclusions can be utilized to enhance the properties of steel products.
So, large attention has been paid on the effect of inclusion on welds mechanical performance.
A great quantity of fine and interlocked acicular ferrite can be obtained in weld metal which make the harmful inclusion become a favorable factor to improve microstructure and propertied of steel weld.
Online since: July 2008
Authors: Zheng Mao Yang, Shashi Bhushan Kumar, Jens P. Tronskar
For FFS assessment the tensile and J R-curve data from a pre-strained
pipeline material, API 5L X65 were obtained in the laboratory to study the influences of the large
plastic strain on the material properties and the fracture resistance of the pipeline girth welds.
In this paper, material tests of the buckled pipeline was performed to study the influence of the large plastic bending strain on the material properties, and nonlinear finite element (FEM) analysis was performed to study the local stress distribution around the buckles or wrinkles.
The material properties of the pipe with such a large plastic strain will be drastically changed, and therefore the fracture resistance capacity of the pipe is expected to be decreased, especially when the damage is located at the seam or girth welds as shown in Fig. 3.
sea bed Girth weld Wrinkle profile R Material Tests of the Buckled Pipe In order to understand the influence of the local buckling or wrinkle bends on the material properties, the tensile and J-R curve tests were performed in the material technology laboratory of DNV Singapore.
According to this stress condition and the material properties of the 20% pre-strained specimens obtained from the tests, the buckled pipeline was assessed as per BS7910: 2005 [3], the critical flaw sizes were plotted in Fig. 8.
In this paper, material tests of the buckled pipeline was performed to study the influence of the large plastic bending strain on the material properties, and nonlinear finite element (FEM) analysis was performed to study the local stress distribution around the buckles or wrinkles.
The material properties of the pipe with such a large plastic strain will be drastically changed, and therefore the fracture resistance capacity of the pipe is expected to be decreased, especially when the damage is located at the seam or girth welds as shown in Fig. 3.
sea bed Girth weld Wrinkle profile R Material Tests of the Buckled Pipe In order to understand the influence of the local buckling or wrinkle bends on the material properties, the tensile and J-R curve tests were performed in the material technology laboratory of DNV Singapore.
According to this stress condition and the material properties of the 20% pre-strained specimens obtained from the tests, the buckled pipeline was assessed as per BS7910: 2005 [3], the critical flaw sizes were plotted in Fig. 8.
Hot Deformation Behavior of Multi-Size Al2O3 Particles Dispersion Strengthened Copper Base Composite
Online since: July 2013
Authors: Bao Hong Tian, Yong Liu, Yi Zhang, Xue Rui Yang
Introduction
It is well known that Cu-Al2O3 composites have excellent comprehensive properties, such as high recrystallization temperature and high microstructure stability, high yield strength and tensile strength, high softening and creep resistance to elevated temperature and high electrical and thermal conductivities etc.
In Fig. 1 the mechanical adding micron-sized Al2O3 particles distribute inhomogeneously in the Al2O3/Cu composite matrix in dark angular shape.
The materials activation energy can reflect a degree of difficulty of the atomic arrangement, which was affected by the metal material nature, deformation temperature, and strain rate factors etc.
In Fig. 1 the mechanical adding micron-sized Al2O3 particles distribute inhomogeneously in the Al2O3/Cu composite matrix in dark angular shape.
The materials activation energy can reflect a degree of difficulty of the atomic arrangement, which was affected by the metal material nature, deformation temperature, and strain rate factors etc.
Online since: February 2024
Authors: Yu Min Huang, Siang Sian Lin, Chen Yuan Chung
With regard to mechanical properties, it has high tensile strength and high abrasion resistance.
Material The material used in this study is the Elastollan® 1185A TPU from BASF Corporation, which has the properties of elastomer at room temperature and plasticizing properties of plastic at high temperature.
Experimental process parameters Factors Value MWCNT (wt% ) 0.3 SCF (wt%) 0.6 GCP pressure (bar) GCP holding time (s) 15 8 Table 2.
The consequence further affects the process stability and mechanical properties of the material.
Luo, Cell morphology and mechanical properties of microcellular mucell® injection molded polyetherimide and polyetherimide/fillers composite foams, Journal of Applied Polymer Science 130 (2013) 4171-4181
Material The material used in this study is the Elastollan® 1185A TPU from BASF Corporation, which has the properties of elastomer at room temperature and plasticizing properties of plastic at high temperature.
Experimental process parameters Factors Value MWCNT (wt% ) 0.3 SCF (wt%) 0.6 GCP pressure (bar) GCP holding time (s) 15 8 Table 2.
The consequence further affects the process stability and mechanical properties of the material.
Luo, Cell morphology and mechanical properties of microcellular mucell® injection molded polyetherimide and polyetherimide/fillers composite foams, Journal of Applied Polymer Science 130 (2013) 4171-4181
Online since: October 2015
Authors: Peter Šmeringai, Marcel Fedák, Miroslav Rimár, Štefan Kuna
Introduction
In recent years, have been increased attempts at application of various actuators using drives with better properties.
Positioning of the manipulator is significantly affected by the characteristics of actuator arising from its basic structural arrangement.
Static characteristics of artificial muscles Fundamentals of pneumatic actuator operation are to convert pneumatic energy into mechanical energy.
Pandová, Progressive Technology Diagnostic and Factors Affecting to Machinability, Applied Mechanics and Materials 616 (2014) 183-190
Rimár et al, Adaptive Rejection Filter for the Drives Stabilization of Pressure Die Casting Machines, Advances in Mechanical Engineering 6 (2014) 1-10.
Positioning of the manipulator is significantly affected by the characteristics of actuator arising from its basic structural arrangement.
Static characteristics of artificial muscles Fundamentals of pneumatic actuator operation are to convert pneumatic energy into mechanical energy.
Pandová, Progressive Technology Diagnostic and Factors Affecting to Machinability, Applied Mechanics and Materials 616 (2014) 183-190
Rimár et al, Adaptive Rejection Filter for the Drives Stabilization of Pressure Die Casting Machines, Advances in Mechanical Engineering 6 (2014) 1-10.
Online since: March 2023
Authors: Muhammad Hasan Basri, Jalaluddin Jalaluddin, Rustan Tarakka, Muhammad Anis Ilahi Rahmadhani, Muhammad Syahid
Poros Malino KM. 6 Bontomarannu Gowa, 92171, Indonesia
2Department of Mechanical Engineering, Hasanuddin University, Jl.
The solar water heating system (SWHS) design is built-in lower operating temperatures, fewer mechanical components, and is easy to fabricate.
Recent developments in the thermo-economic performance of the SWHS include collector design, modification of the thermo-physical properties of heat transfer fluids, integrated thermal energy storage, and flat plate solar collector (FPSC) hybrid systems.
The increase in the design factor and the convective heat transfer coefficient between the fluid and the absorber material is the most desirable factor to improve the overall performance of the solar collector.
However, the influence of fluid flow velocity also affects the increase of the outlet water temperature.
The solar water heating system (SWHS) design is built-in lower operating temperatures, fewer mechanical components, and is easy to fabricate.
Recent developments in the thermo-economic performance of the SWHS include collector design, modification of the thermo-physical properties of heat transfer fluids, integrated thermal energy storage, and flat plate solar collector (FPSC) hybrid systems.
The increase in the design factor and the convective heat transfer coefficient between the fluid and the absorber material is the most desirable factor to improve the overall performance of the solar collector.
However, the influence of fluid flow velocity also affects the increase of the outlet water temperature.
Online since: October 2007
Authors: Anthony D. Rollett, Abhijit P. Brahme, C.G. Roberts
Other properties such as corrosion resistance are being related quantitatively to
microstructure.
Grain boundary properties, such as energy and mobility, can then be associated with the misorientation.
The nodes in the interior of grains are also updated but with numerical factors to ensure that they do not significantly affect the motion of the interfaces.
Current opinion generally holds that both factors are important but that texture is often determined early in the recrystallization process, commonly referred to as oriented nucleation.
In over-simplified terms, mechanical properties are generally well described by average values over a microstructure, whereas the recrystallization process is sensitive to extreme values of distributions of misorientation, orientation gradients, stored energy and other factors.
Grain boundary properties, such as energy and mobility, can then be associated with the misorientation.
The nodes in the interior of grains are also updated but with numerical factors to ensure that they do not significantly affect the motion of the interfaces.
Current opinion generally holds that both factors are important but that texture is often determined early in the recrystallization process, commonly referred to as oriented nucleation.
In over-simplified terms, mechanical properties are generally well described by average values over a microstructure, whereas the recrystallization process is sensitive to extreme values of distributions of misorientation, orientation gradients, stored energy and other factors.
Online since: June 2012
Authors: Yu Yang, Xing Guo, Tao Xu, Shu Dong Yang
In order to reduce calculation scale and accelerate computing speed, chamfer and other characteristics that have less influence on mechanical property are omitted.
Material properties of the key parts.
Material properties of the nut, piston and output shaft are shown in Table 2.
The total efficiency of the actuator is consisted of mechanical efficiency and volumetric efficiency: the mechanical efficiency relates to the multi-start thread transmission efficiency and other mechanical friction losses, and the volumetric efficiency relates to inner leakage losses and outer leakage losses [5].
The multi-start thread transmission efficiency is the main factor that affects total efficiency.
Material properties of the key parts.
Material properties of the nut, piston and output shaft are shown in Table 2.
The total efficiency of the actuator is consisted of mechanical efficiency and volumetric efficiency: the mechanical efficiency relates to the multi-start thread transmission efficiency and other mechanical friction losses, and the volumetric efficiency relates to inner leakage losses and outer leakage losses [5].
The multi-start thread transmission efficiency is the main factor that affects total efficiency.
Online since: March 2022
Authors: Muhammad Naqiuddin Mohd Warid, Norhidayah Abdul Hassan, Ramadhansyah Putra Jaya, Khairil Azman Masri, Zaid Hazim Al-Saffar, Nicole Liew Siaw Ing, Ng Cui Ming
These types of distress occur in various ways on the pavement, and many factors impact their type and mechanisms.
In pavement, these types of distress can occur in different forms and consist of several factors that affected the mechanisms.
Table 6 shows the bitumen properties results.
Bitumen Properties Results Properties Result Requirement values Penetration 66.17mm 60mm – 70mm Softening Point 53.6°C 49°C - 56°C Stability.
Tests for mechanical and physical properties of aggregates.
In pavement, these types of distress can occur in different forms and consist of several factors that affected the mechanisms.
Table 6 shows the bitumen properties results.
Bitumen Properties Results Properties Result Requirement values Penetration 66.17mm 60mm – 70mm Softening Point 53.6°C 49°C - 56°C Stability.
Tests for mechanical and physical properties of aggregates.
Online since: May 2021
Authors: Saja A. Moosa, Akram R. Jabur, Emad S. Al-Hassani
Preparation and Physical Properties of PCL-Metoprolol Tartrate Electospun Nanofibers as Drug Delivery System
Saja A.
The preparation processes, morphology, chemical structure thermal properties were evaluated.
Water/ oil emulsion electrospinning process basically have been affected by the properties of emulsions, include stability, viscosity and conductivity of emulsions[5].
Ramakrishna, emulsion electrospinning of polycaprolactone: influence of the surfactant type towards the scaffolds properties, J.
Jabur, Improving the mechanical properties of (chitosan /polyurethane) electrospun blend scaffold used for skin regeneration, AIP Conference Proceedings 2123, (2019) 020042.
The preparation processes, morphology, chemical structure thermal properties were evaluated.
Water/ oil emulsion electrospinning process basically have been affected by the properties of emulsions, include stability, viscosity and conductivity of emulsions[5].
Ramakrishna, emulsion electrospinning of polycaprolactone: influence of the surfactant type towards the scaffolds properties, J.
Jabur, Improving the mechanical properties of (chitosan /polyurethane) electrospun blend scaffold used for skin regeneration, AIP Conference Proceedings 2123, (2019) 020042.