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Online since: December 2013
Authors: Jie Zhu, Yue Ming Zhang, Zhi Cheng Tao, Nan Wei Xu, Li Qun Wang, Xiao Lin Zhu
Their surface properties were characterized by contact angles, surface energies and XPS.
It has been envisaged for a long time as an attractive approach to obtain novel products encompassing suitable biodegradable and mechanical properties by changing the ratios of aliphatic units to aromatic ones [8, 9].
Low-temperature plasma treatment is regarded as a green and effective one for modifying the surface properties or introducing desired chemical groups at the surface of a material without affecting its bulk properties [25].
PBT-co-PBS/PEG is selected as the substrate because it is an elastomeric material which has the good properties on swelling, degradability and mechanical strength.
These properties make it suitable as the scaffold for the artificial soft tissues, such as the glands, blood vessels and derma [13].
It has been envisaged for a long time as an attractive approach to obtain novel products encompassing suitable biodegradable and mechanical properties by changing the ratios of aliphatic units to aromatic ones [8, 9].
Low-temperature plasma treatment is regarded as a green and effective one for modifying the surface properties or introducing desired chemical groups at the surface of a material without affecting its bulk properties [25].
PBT-co-PBS/PEG is selected as the substrate because it is an elastomeric material which has the good properties on swelling, degradability and mechanical strength.
These properties make it suitable as the scaffold for the artificial soft tissues, such as the glands, blood vessels and derma [13].
Online since: January 2014
Authors: Niwat Anuwongnukroh, Surachai Dechkunakorn, Peerapong Tua-Ngam
This solubility allows alloying with many of the elements to modify both the mechanical properties and the transformation properties of the system(21-22).
This study cannot imitate all factors in the oral cavity and had limitations such as temperature, quality and quantity of saliva, plaque, protein, physiological and chemical properties of food and liquids, and oral health conditions that affect the corrosion of Ni from the simulated orthodontic appliance.
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials. 10th ed.
Mechanical properties of several NiTi alloy wires in three-point bending tests.
Structure and properties of TiN coatings.
This study cannot imitate all factors in the oral cavity and had limitations such as temperature, quality and quantity of saliva, plaque, protein, physiological and chemical properties of food and liquids, and oral health conditions that affect the corrosion of Ni from the simulated orthodontic appliance.
Properties and Selection: Nonferrous Alloys and Special-Purpose Materials. 10th ed.
Mechanical properties of several NiTi alloy wires in three-point bending tests.
Structure and properties of TiN coatings.
Online since: May 2014
Authors: Ya Lun Hu, Zhong Xu, Meng Lei Zhu, Jun Xiao, Xing Zhen Wang
The drag-reduction of a turbulent flow over a compliant surface causes a variety of fluid-structure interactions which have been actively studied for five decades [6], but actually speaking, related experimental and theoretical work has not provided a definitive answer to the question of how surface comply with a flow state affecting turbulent drag.
Before the explanation, let’s give a review on how a dolphin skin works when swimming at flow field with different flow properties.
The challenge is of course to find a specific material with the right physical properties to achieve the desired goal [10].
(2) In order to develop a kind of compliant material with desired properties, the deformation and displacement magnitude of the surface is needed.
Fig.4 The counter gram Another factor responsible for drag-reduction can be concluded as the laminar-turbulent transition.
Before the explanation, let’s give a review on how a dolphin skin works when swimming at flow field with different flow properties.
The challenge is of course to find a specific material with the right physical properties to achieve the desired goal [10].
(2) In order to develop a kind of compliant material with desired properties, the deformation and displacement magnitude of the surface is needed.
Fig.4 The counter gram Another factor responsible for drag-reduction can be concluded as the laminar-turbulent transition.
Online since: April 2019
Authors: Vidhura Mahendra
Properties of Rosin
Methods for improving rosin production and its properties.
The morphology, structure, thermal, and mechanical properties of the RWPU/CNs nano-composites are investigated.
Flexural and dynamic mechanical properties of the cured resins are determined using three-point bending test and dynamic mechanical analysis (DMA).
Thermal stability, tensile and dynamic mechanical properties of the cured epoxies is investigated.
Some physical and mechanical properties of rosin–copper treated wood is examined.
The morphology, structure, thermal, and mechanical properties of the RWPU/CNs nano-composites are investigated.
Flexural and dynamic mechanical properties of the cured resins are determined using three-point bending test and dynamic mechanical analysis (DMA).
Thermal stability, tensile and dynamic mechanical properties of the cured epoxies is investigated.
Some physical and mechanical properties of rosin–copper treated wood is examined.
Online since: July 2011
Authors: Da Gui Huang, Wen Jie Wu, Zheng Dong
As a new diagnostic method, the research of the diagnostic accuracy, effectiveness and influencing factors of SVM is not enough [6].
To facilitate the diagnosis and the diagnostic accuracy of the factors affecting the comparison, as shown in Table 1 using 8 kinds of failure modes (M5 ~ M0, MV, and B1) constitute a JT9D engine failure sample, as the training samples; the same time Two nearly complete collection of relevant samples of TA40 and CL16 failure measured by superimposed noise is used as a validation of tested samples.
The failure of the samples in Table 1, the variance with the very poor law and standardized methods such as normalized, standardized way to examine the samples and correlation to the classification rate and the diagnostic accuracy of affect.
This shows that the normalized range method can change some of the samples of fully related to the distance between two properties, it is very close to almost merge, which is contributing to the hyperplane distance intervals and the classification based on SVM, not the two distinguish the fault into the same category as the main reason.
Mechanical Science and Technology, 2008, 22(2): 213-220
To facilitate the diagnosis and the diagnostic accuracy of the factors affecting the comparison, as shown in Table 1 using 8 kinds of failure modes (M5 ~ M0, MV, and B1) constitute a JT9D engine failure sample, as the training samples; the same time Two nearly complete collection of relevant samples of TA40 and CL16 failure measured by superimposed noise is used as a validation of tested samples.
The failure of the samples in Table 1, the variance with the very poor law and standardized methods such as normalized, standardized way to examine the samples and correlation to the classification rate and the diagnostic accuracy of affect.
This shows that the normalized range method can change some of the samples of fully related to the distance between two properties, it is very close to almost merge, which is contributing to the hyperplane distance intervals and the classification based on SVM, not the two distinguish the fault into the same category as the main reason.
Mechanical Science and Technology, 2008, 22(2): 213-220
Online since: May 2013
Authors: A. P. Kulkarni, S. K. Choudhury, Satish Chinchanikar
Kulkarni3, c
1Ph.D scholar, Mechanical Engineering Department, Indian Institute of Technology, Kanpur, India
2 Professor, Mechanical Engineering Department, Indian Institute of Technology, Kanpur, India
3 Associate professor, Mechanical Engineering Department, Vishwakarma Institute of Information Technology, Pune, India
asatish@iitk.ac.in, bchoudhry@iitk.ac.in, capk_31173@rediffmail.com
Keywords: Interface temperature, Tool-work thermocouple, hardened steel, Turning, Coated inserts.
Experimental observations indicate that the interface temperature is higher for harder work material and get affected mostly by cutting speed followed by feed.
Introduction Heat generated in machining operation is an important factor in addressing metal cutting issues like dimensional accuracy, surface integrity and tool life.
Interface temperature was observed to be more influenced by thermal properties of the workpiece and tool coating.
Brandao, Turning hardened steel using coated carbide at high cutting speeds, Journal of Brazilian Society of Mechanical Science and Engineering 30(2) (2008) 104-109
Experimental observations indicate that the interface temperature is higher for harder work material and get affected mostly by cutting speed followed by feed.
Introduction Heat generated in machining operation is an important factor in addressing metal cutting issues like dimensional accuracy, surface integrity and tool life.
Interface temperature was observed to be more influenced by thermal properties of the workpiece and tool coating.
Brandao, Turning hardened steel using coated carbide at high cutting speeds, Journal of Brazilian Society of Mechanical Science and Engineering 30(2) (2008) 104-109
Online since: December 2025
Authors: Afsar Husain, Sanan Husain Khan, Shaima Alhosani
Khan3,c
1Department of Mechanical and Aerospace Engineering, Collage of Engineering, UAE University, Al Ain, UAE
2Department of Mechanical and Aerospace Engineering, Collage of Engineering, UAE University, Al Ain, UAE
3Department of Mechanical and Aerospace Engineering, Collage of Engineering, UAE University, Al Ain, UAE
a201401162@uaeu.ac.ae, b700040474@uaeu.ac.ae, c shkhan@uaeu.ac.ae
Keywords: projectile geometry, impact mechanics, finite element analysis, ABAQUS, aluminum plates, penetration dynamics, nose shape effects.
Prior experimental work suggests that double blunt-nosed projectiles may require more time and energy to perforate aluminum targets compared to single-nose projectiles, affecting the ballistic limit [8, 12].
The research examines key factors such as residual velocity, energy absorption, deformation, and failure patterns to improve the understanding of projectile penetration, contributing to the design of stronger, lightweight protective materials for aerospace and defense applications.
The target plate, a deformable structure, had a diameter of 255 mm and a thickness of 0.82 mm, incorporating aluminum material properties.
This study considers the aluminum alloy 2024-T3 as the target material, with its properties shown in Table 1 below.
Prior experimental work suggests that double blunt-nosed projectiles may require more time and energy to perforate aluminum targets compared to single-nose projectiles, affecting the ballistic limit [8, 12].
The research examines key factors such as residual velocity, energy absorption, deformation, and failure patterns to improve the understanding of projectile penetration, contributing to the design of stronger, lightweight protective materials for aerospace and defense applications.
The target plate, a deformable structure, had a diameter of 255 mm and a thickness of 0.82 mm, incorporating aluminum material properties.
This study considers the aluminum alloy 2024-T3 as the target material, with its properties shown in Table 1 below.
Online since: October 2010
Authors: Chi Fu Yang, Jun Wei Han, Shu Tao Zheng, Peter O. Ogbobe
Mechanical and Electrical Engineering, Harbin Institute of Technology, Harbin, China, 150001
Email: ycf1008@163.com
Keywords: parallel machine tool, hydraulic system, feedback linearization, path tracking.
Moreover, most of these controllers demand some calculations of system dynamics, which may affect the property of real time for actual system.
Thereby, the dynamic model of mechanical system is briefly described for parallel machine tool.
Control Design Under the assumption of known dynamics structure, system geometric and inertia properties, and the perfectly repeating of desired load force.
Hence, a factor matrix can be utilized as (11) (12) where and are positive real values corresponding to sensitivity thresholds.
Moreover, most of these controllers demand some calculations of system dynamics, which may affect the property of real time for actual system.
Thereby, the dynamic model of mechanical system is briefly described for parallel machine tool.
Control Design Under the assumption of known dynamics structure, system geometric and inertia properties, and the perfectly repeating of desired load force.
Hence, a factor matrix can be utilized as (11) (12) where and are positive real values corresponding to sensitivity thresholds.
Online since: September 2016
Authors: Lu Kuan Qi, Yi Zhou Yang
Steel Corrosion affects severely on the life and durability of RC structures.
By comparing mechanical property of different concrete material models provided in Ls-dyna, the applicability of concrete models are examined, regularity of crack development, plastic deformation ability and ultimate flexural capacity of local corroded RC beams are analyzed.
Geometrical details of RC beam subjected to local corrosion and material properties of concrete and rebars are tabulated in Tables 1 and 2.
It can be concluded that MAT159 (CSC)model predicts bending, tension and compression properties of concrete during the three point bending test, UUT and UUC tests, so that MAT159 model is chosen as the concrete model in the present research.
The effects of the high corrosion rates induced pitting corrosion and the deterioration of mechanical property of concrete on the ultimate capacity and plastic deformation capacity of corroded RC member are currently under investigation.
By comparing mechanical property of different concrete material models provided in Ls-dyna, the applicability of concrete models are examined, regularity of crack development, plastic deformation ability and ultimate flexural capacity of local corroded RC beams are analyzed.
Geometrical details of RC beam subjected to local corrosion and material properties of concrete and rebars are tabulated in Tables 1 and 2.
It can be concluded that MAT159 (CSC)model predicts bending, tension and compression properties of concrete during the three point bending test, UUT and UUC tests, so that MAT159 model is chosen as the concrete model in the present research.
The effects of the high corrosion rates induced pitting corrosion and the deterioration of mechanical property of concrete on the ultimate capacity and plastic deformation capacity of corroded RC member are currently under investigation.
Online since: January 2010
Authors: Roberto Montanari, Nadia Ucciardello
In fcc metals only one slip system is present and, as schematically displayed by fig. 1, the SFE is
the main factor which determines the deformation structures.
Dislocation density, stored energy, mechanical properties increase with increasing shock pressure and pulse duration.
Mechanical twins are also generated in both Cu and Ni; for Ni higher SFE they are more difficult to form in Ni than in Cu.
The proportionality factor depends on the temperature and gives the probability that an intersection can generate an embryo.
Piero Plini of the Department of Mechanical Engineering for the assistance in shock load tests.
Dislocation density, stored energy, mechanical properties increase with increasing shock pressure and pulse duration.
Mechanical twins are also generated in both Cu and Ni; for Ni higher SFE they are more difficult to form in Ni than in Cu.
The proportionality factor depends on the temperature and gives the probability that an intersection can generate an embryo.
Piero Plini of the Department of Mechanical Engineering for the assistance in shock load tests.