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Online since: July 2014
Authors: Xue Feng Wu, Teng Fei Gao, Bo Wen Zhao, He Rong Cao
During the process, the temperature is a key factor.
However, the workpiece will be ablation due to excessive cutting area temperature, affecting surface quality of the workpiece.
The initial condition at time t = 0 is given by (2) GH4169 is used to carry out the experiment and simulation with size 50×5×30mm,which has stable structure property and excellent mechanical properties.
However, the workpiece will be ablation due to excessive cutting area temperature, affecting surface quality of the workpiece.
The initial condition at time t = 0 is given by (2) GH4169 is used to carry out the experiment and simulation with size 50×5×30mm,which has stable structure property and excellent mechanical properties.
Online since: April 2023
Authors: Marcel Rose M. Mabida, Mervin L. Mamza, Kenneth John G. Solis, Showna Lee T. Sales
Widiasanti, “Mechanical properties of normal concrete for local road pavement using plastic waste substitution as coarse aggregate,” IOP Conf.
Nassiri, “Pervious concrete mixture optimization, physical, and mechanical properties and pavement design: A review,” J.
Maallem, “The use of plastic waste as fine aggregate in the self-compacting mortars: Effect on physical and mechanical properties,” Constr.
Romdon, “Mechanical properties of polypropylene plastic waste usage and high-density polyethylene in concrete,” 2019, doi: 10.1088/1757-899X/620/1/012034
Hazem Abdellatif, “Mechanical and Physical Properties of PP and HDPE,” Eng.
Nassiri, “Pervious concrete mixture optimization, physical, and mechanical properties and pavement design: A review,” J.
Maallem, “The use of plastic waste as fine aggregate in the self-compacting mortars: Effect on physical and mechanical properties,” Constr.
Romdon, “Mechanical properties of polypropylene plastic waste usage and high-density polyethylene in concrete,” 2019, doi: 10.1088/1757-899X/620/1/012034
Hazem Abdellatif, “Mechanical and Physical Properties of PP and HDPE,” Eng.
Online since: June 2025
Authors: Yao Dong Gu, Zhi Feng Zhou, Da Tao Xu, Mei Zi Wang, Hui Yu Zhou, Yu Wei Liu
The variation in running strike patterns is one of the significant factors influencing the loading rate of the plantar fascia during running.
Table 2 enumerates the material properties of each part.
Material properties of the components in the finite element model.
In other words, one of the factors in the incidence of PFs is HV severity.
Zahouani, In vivo measurements of the elastic mechanical properties of human skin by indentation tests, Medical engineering & physics. 30 (2008) 599-606 [26] J.
Table 2 enumerates the material properties of each part.
Material properties of the components in the finite element model.
In other words, one of the factors in the incidence of PFs is HV severity.
Zahouani, In vivo measurements of the elastic mechanical properties of human skin by indentation tests, Medical engineering & physics. 30 (2008) 599-606 [26] J.
Online since: March 2008
Authors: Gerard Mesmacque, Ran Guo, En Qiang Lin, Rui Chun Duan, Abdelwaheb Amrouche
In these assemblies the stress field is
complex and a number of parameters, including effect of the geometrical discontinuities, contact
between elements, tightening, material properties and applied load must be considered.
Fretting is the degradation of near-surface material that arises from a triple interaction among wear, corrosion and fatigue phenomena [2], often observed in nominally-clamped mechanical assemblies subjected to oscillatory loads or vibratory excitation.
In this case, the initiation of the fretting fatigue crack is affected by a number of factors, such as the shear stresses τrθ, contact normal force, contact friction, etc.
However, such an increase in fretting fatigue life cannot be observed because fretting fatigue is also affected by the contacting pressure, which accelerates the surface damage of the material [2]
Normally, the second factor is more important than the first.
Fretting is the degradation of near-surface material that arises from a triple interaction among wear, corrosion and fatigue phenomena [2], often observed in nominally-clamped mechanical assemblies subjected to oscillatory loads or vibratory excitation.
In this case, the initiation of the fretting fatigue crack is affected by a number of factors, such as the shear stresses τrθ, contact normal force, contact friction, etc.
However, such an increase in fretting fatigue life cannot be observed because fretting fatigue is also affected by the contacting pressure, which accelerates the surface damage of the material [2]
Normally, the second factor is more important than the first.
Online since: December 2013
Authors: André J. Souza, Flávio J. Lorini, Guilherme Cortelini Rosa
Lorini 1,c
1 Federal University of Rio Grande do Sul (UFRGS), Mechanical Engineering Department (DEMEC), Porto Alegre, RS, Brazil.
The roughness surface generated through turning process is affected by the conditions of machine-tool, workpiece, tool clamping and mainly by feed rate f [mm/rev] and nose radius rε [mm] of the cutting tool.
In general, surface integrity can be divided into two aspects: the external topography of surfaces (surface finish); and the microstructure, mechanical properties and residual stresses of internal subsurface layers [6].
There are some factors that may contribute to generate roughness, such as: grooves generated by the tool nose; burr generation on the workpiece during the cutting operation; bits of the built-up edge in the machined surface; geometric shape of the chip breaker on the tool edge [3].
Dissertation, Mechanical Engineering Department, Georgia Institute of Technology, 2006, 170p
The roughness surface generated through turning process is affected by the conditions of machine-tool, workpiece, tool clamping and mainly by feed rate f [mm/rev] and nose radius rε [mm] of the cutting tool.
In general, surface integrity can be divided into two aspects: the external topography of surfaces (surface finish); and the microstructure, mechanical properties and residual stresses of internal subsurface layers [6].
There are some factors that may contribute to generate roughness, such as: grooves generated by the tool nose; burr generation on the workpiece during the cutting operation; bits of the built-up edge in the machined surface; geometric shape of the chip breaker on the tool edge [3].
Dissertation, Mechanical Engineering Department, Georgia Institute of Technology, 2006, 170p
Online since: December 2012
Authors: Ming Xie, Ji Ming Zhang, Yong Tai Chen, Man Men Liu, Yun Feng Yang, Sai Bei Wang, You Cai Yang
Its performance directly affects the safety running for switch apparatus, playing an important role in the service life of electrical appliance as well as reliability and security.
Contact erosion, according to its reason of formation can be divided into mechanical erosion, chemical corrosion and electrical erosion.
Usually, the erosion of anode or cathode contacts is different because of the two contactor material’s different physical properties, or the different amount of the input arc energy and heat-flow density when the circuit turn on or turn off.
Contacts surface morphology, under the influence of many factors, such as mechanical impact, arcing and electron or ion bombardment, are bound to change.
Project(No.u0837601) supported by the National Nature Science Foundation of China References [1] Zhou Maoxiang , Low Voltage Electrical Design Manual, Mechanical Industry Press, Beijing, 1992
Contact erosion, according to its reason of formation can be divided into mechanical erosion, chemical corrosion and electrical erosion.
Usually, the erosion of anode or cathode contacts is different because of the two contactor material’s different physical properties, or the different amount of the input arc energy and heat-flow density when the circuit turn on or turn off.
Contacts surface morphology, under the influence of many factors, such as mechanical impact, arcing and electron or ion bombardment, are bound to change.
Project(No.u0837601) supported by the National Nature Science Foundation of China References [1] Zhou Maoxiang , Low Voltage Electrical Design Manual, Mechanical Industry Press, Beijing, 1992
Online since: August 2011
Authors: M.R.M. Aliha, Mahdi Rezaei
At each increment, the direction of fracture initiation for the tip of growing crack was determined using the fracture parameters (i.e. stress intensity factors and T-stress) based on the modified maximum tangential stress (MMTS) criterion.
KI, KIl, T) and rc are known. rc is assumed constant material property representing the size of damage zone ahead of the crack tip.
(4) where YI ,YII and T* are the geometry factors that are functions of specimen geometry and loading condition.
Table 1 presents the numerical values of geometry factors for pure mode II condition of the tested CCCD and DLSP specimens (extracted from [6,7] for a/R = 0.3 and a/w = 0.3).
Geometry factors and the fracture initiation angles of the tested CCCD and DLSP specimens subjected to pure mode II loading.
KI, KIl, T) and rc are known. rc is assumed constant material property representing the size of damage zone ahead of the crack tip.
(4) where YI ,YII and T* are the geometry factors that are functions of specimen geometry and loading condition.
Table 1 presents the numerical values of geometry factors for pure mode II condition of the tested CCCD and DLSP specimens (extracted from [6,7] for a/R = 0.3 and a/w = 0.3).
Geometry factors and the fracture initiation angles of the tested CCCD and DLSP specimens subjected to pure mode II loading.
Online since: July 2011
Authors: Xin Gui Tang, Shu Juan Kuang, Nan Ding, Yan Ping Jiang, Qiu Xiang Liu, Tie Dong Cheng
Ferroelectric, dielectric and pyroelectric properties of highly c-axis -oriented nanostructured (Pb,Sr)(Zr,Ti)O3 thin films
T.D.
Furthermore, an isovalent A-site doping can also affect those properties.
However, a few papers focused on their structure, ferroelectric, dielectric and pyroelectric properties.
The (001)-orientation characteristics of grains, dielectric properties, ferroelectric and pyroelectric properties of the (Pb0.92Sr0.08)(Zr0.65Ti0.35)O3 thin films on Pt/Ti/SiO2/Si substrates are also reported.
As we know, ferroelectric thin films with orientation always exhibit excellent properties because it could be polarized in one direction. e.g., PZT, higher values of remanent polarization and piezoelectric properties were found than those of polycrystalline one [13,14].
Furthermore, an isovalent A-site doping can also affect those properties.
However, a few papers focused on their structure, ferroelectric, dielectric and pyroelectric properties.
The (001)-orientation characteristics of grains, dielectric properties, ferroelectric and pyroelectric properties of the (Pb0.92Sr0.08)(Zr0.65Ti0.35)O3 thin films on Pt/Ti/SiO2/Si substrates are also reported.
As we know, ferroelectric thin films with orientation always exhibit excellent properties because it could be polarized in one direction. e.g., PZT, higher values of remanent polarization and piezoelectric properties were found than those of polycrystalline one [13,14].
Online since: January 2011
Authors: Ru Ting Xia
Most of the mechanical energy used to form the chip becomes heat, which generates high temperatures in the cutting region.
High cutting temperature, which adversely affects tool life, dimensional and form deviation, surface integrity of the product.
Most of these steels have much better mechanical properties at high temperatures.
Shape of cutting tools, particularly the tools angles, and tool material are very important factors.
Boothroyed: Lubrication action of cutting fluids Journal of Mechanical Engineering Science Vol.7 (1) (1965), pp.67–81 [6] M.
High cutting temperature, which adversely affects tool life, dimensional and form deviation, surface integrity of the product.
Most of these steels have much better mechanical properties at high temperatures.
Shape of cutting tools, particularly the tools angles, and tool material are very important factors.
Boothroyed: Lubrication action of cutting fluids Journal of Mechanical Engineering Science Vol.7 (1) (1965), pp.67–81 [6] M.
Online since: December 2006
Authors: Heoung Jae Chun, Joon Hyung Byun, Choong Hee Yi
Damage Identification by Embedded Piezoceramic Sensors
In the Composite Plate
Heoung-Jae Chun 1, a, Choong-Hee Yi 2, b, Joon-Hyung Byun 3, c
1
School of Mechanical Engineering, Yonsei University
134, Shinchon-dong, Seodaemun-gu, Seoul, 120-749, Korea
2
School of Mechanical Engineering, Yonsei University
134, Shinchon-dong, Seodaemun-gu, Seoul, 120-749, Korea
3Korea Institute of Machinery and Materials
66, Sangnam-Dong, Changwon, Kyungnam, 641-010, Korea
a
hjchun@yonsie.ac.kr, bsephirot@yonsei.ac.kr , cbjh1673@kmail.kimm.re.kr
Keywords: Embedded piezoceramic sensor, damage detection, Lamb
Abstract.
The embedded structural health monitoring system is envisioned to be an important factor of future structural systems.
The vibration patterns and dispersive properties through thickness are not identical for each mode.
It shows the present of delamination or impact damage strongly affects the Lamb wave propagation.
The embedded structural health monitoring system is envisioned to be an important factor of future structural systems.
The vibration patterns and dispersive properties through thickness are not identical for each mode.
It shows the present of delamination or impact damage strongly affects the Lamb wave propagation.