Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: August 2015
Authors: Azizul Mohamad, Mohd Afendi, M.S. Fartini, M.S. Abdul Majid
Introduction
Over the past decades, researchers have been working hard on the discovery of new natural fibre materials due to their biodegradability, low density, low cost, high specific stiffness and good mechanical properties [1].
Researchers have shown that, there are several factors influencing the flexural strength of the fibres [6].
The level of fibres contents were found to heavily affecting the flexural strength of the fibres.
[6] R.K,S.O.Z, “The effect of fibre content on mechanical properties of hemp and basalt fibre reinforced phenol foemaldehyde composites”.
[7] Jenyfer, M.B.M, J.U.P, “A Comparative Study on the Mechanical Properties of Jute and Sisal Fiber Reinforced Polymer Composites”.
Researchers have shown that, there are several factors influencing the flexural strength of the fibres [6].
The level of fibres contents were found to heavily affecting the flexural strength of the fibres.
[6] R.K,S.O.Z, “The effect of fibre content on mechanical properties of hemp and basalt fibre reinforced phenol foemaldehyde composites”.
[7] Jenyfer, M.B.M, J.U.P, “A Comparative Study on the Mechanical Properties of Jute and Sisal Fiber Reinforced Polymer Composites”.
Online since: January 2013
Authors: Jing Shun Duanmu, Ji Yong Du, Ji Yang, Chao Zhang, Peng Fei Wu
We propose a fault tree approach to qualitatively identify risk factors that affect flight safety.
Figure1 Flight safety risk factors identification fault tree Table 1 Each level flight safety risk factors The first layer No.
Risk factors Second layer No.
Flight safety classification of the risk factors Characteristics of a variety of incentives based on flight safety risk exists, the use of the method according to the classification of the sources of risk, and quantitative identification of the risk factors that affect flight safety is divided into four main categories (as shown in Figure 3).
GAN Xu-sheng, DUANMU jing-shun,CONG Wei,GAO Jian-guo.Induce Pattern Analysis and Prediction Study an Mechanical Causation Flight Accident[J].
Figure1 Flight safety risk factors identification fault tree Table 1 Each level flight safety risk factors The first layer No.
Risk factors Second layer No.
Flight safety classification of the risk factors Characteristics of a variety of incentives based on flight safety risk exists, the use of the method according to the classification of the sources of risk, and quantitative identification of the risk factors that affect flight safety is divided into four main categories (as shown in Figure 3).
GAN Xu-sheng, DUANMU jing-shun,CONG Wei,GAO Jian-guo.Induce Pattern Analysis and Prediction Study an Mechanical Causation Flight Accident[J].
Online since: February 2012
Authors: Ying Li, Bei Hai He
Introduction
The coating surface topography and properties are dependent on factors such as pore structure, coating color formulation, particle arranging and coating speed, et.
The amount and type of latex binder, pigment particle, and coating condition have a significant effect on both the structure and chemical properties of pigment coatings, which affects critical surface properties, e.g., gloss, ink setting rate via liquid absorption, and spreading properties [1, 2].
Measurement of Surface Topography and Properties.
The findings indicated that pigment affected the pore size, depth and distribution of the coated paper surface owing to the different pigment properties.
It could be concluded that pigment properties affected surface topography, pore distribution, surface physical-chemical properties and final printing quality of coated paper.
The amount and type of latex binder, pigment particle, and coating condition have a significant effect on both the structure and chemical properties of pigment coatings, which affects critical surface properties, e.g., gloss, ink setting rate via liquid absorption, and spreading properties [1, 2].
Measurement of Surface Topography and Properties.
The findings indicated that pigment affected the pore size, depth and distribution of the coated paper surface owing to the different pigment properties.
It could be concluded that pigment properties affected surface topography, pore distribution, surface physical-chemical properties and final printing quality of coated paper.
Online since: October 2011
Authors: Jian Dong Bao, Chang Ming Wang
The results that can not only reflect mechanical impedance property of the shoulder, but also embody the equivalent dynamic response property of man-gun system.
Introduction Lots of factors influenced automatic firing precision, which not only depended on firearm’s performance, and depended on the subjective factors of shooter such as controlling-gun ability.
The paper researched dynamic property of gun-shoulder, quality, rigidity and damping etc.
The results that can not only reflect mechanical impedance property of the shoulder, but also embody the equivalent dynamic response property of man-gun system.
This result reflects the impact of the shooters’ psychological factors and the way they used the gun.
Introduction Lots of factors influenced automatic firing precision, which not only depended on firearm’s performance, and depended on the subjective factors of shooter such as controlling-gun ability.
The paper researched dynamic property of gun-shoulder, quality, rigidity and damping etc.
The results that can not only reflect mechanical impedance property of the shoulder, but also embody the equivalent dynamic response property of man-gun system.
This result reflects the impact of the shooters’ psychological factors and the way they used the gun.
Online since: January 2011
Authors: Yoshiyuki Kondo, Koshiro Mizobe, Masanobu Kubota
The chemical composition and mechanical properties are shown in Table 1 and 2, respectively.
Table 2 Mechanical properties of test material Table 1 Chemical composition (mass%) Material C Si Mn P S S25C 0.3 0.2 0.5 0.008 0.02 Material sy(MPa) sB(MPa) d(%) f(%) S25C 300 497 34.5 62 Preparation of pre-cracked specimens.
Mechanical properties shown in table 2 are the properties after stress relief. 68 t = 7 2 15 A 120 60° r 2 A Fig.2 Preparation of short pre-crack at notch Detail of notch Fig.1 Test specimen (Dimensions are in mm ) Fatigue crack propagation test.
The stress intensity factor range was calculated using stress range.
Srawley, Stress-Intensity Factors for Single-Edge-Notch Specimens in Bending or Combined Bending and Tension by Boundary Collocation of a Stress Function, NASA TN D-2603 (1965)
Table 2 Mechanical properties of test material Table 1 Chemical composition (mass%) Material C Si Mn P S S25C 0.3 0.2 0.5 0.008 0.02 Material sy(MPa) sB(MPa) d(%) f(%) S25C 300 497 34.5 62 Preparation of pre-cracked specimens.
Mechanical properties shown in table 2 are the properties after stress relief. 68 t = 7 2 15 A 120 60° r 2 A Fig.2 Preparation of short pre-crack at notch Detail of notch Fig.1 Test specimen (Dimensions are in mm ) Fatigue crack propagation test.
The stress intensity factor range was calculated using stress range.
Srawley, Stress-Intensity Factors for Single-Edge-Notch Specimens in Bending or Combined Bending and Tension by Boundary Collocation of a Stress Function, NASA TN D-2603 (1965)
Online since: February 2007
Authors: Antal Huba, József Keskeny
Influences of Manufacturing Technology on the
Mechanical Properties of Silicone Rubber Structures
József Keskeny, Antal Huba
Budapest University of Technology and Economics
Dept. of Mechatronics, Optics and Instrumentation Technology
H-1111 Budapest, Egry J. u. 1.
The paper presents the results of investigations made to clear how the different manufacturing technologies of silicone rubber structures affect the mechanical properties of the products.
The paper summarises the results of our investigations on the material properties in the light of the manufacturing technology.
In [5] we report the properties of the patented sensor.
Summary We presented that the manufacturing method of silicone rubber structures affects the mechanical properties of the products.
The paper presents the results of investigations made to clear how the different manufacturing technologies of silicone rubber structures affect the mechanical properties of the products.
The paper summarises the results of our investigations on the material properties in the light of the manufacturing technology.
In [5] we report the properties of the patented sensor.
Summary We presented that the manufacturing method of silicone rubber structures affects the mechanical properties of the products.
Molecular Interactions in PA6, LCP and their Blend Incorporated with Functionalized Carbon Nanotubes
Online since: September 2010
Authors: Jian Hong Zhao, Henry Kuo Feng Cheng, Nanda Gopal Sahoo, Lin Li, Siew Hwa Chan
The dispersion of MWCNT-COOH in the
polymer matrices and their interfacial interactions with polymer molecules were found to be the
most important factors affecting the properties of composites.
Moreover, studies on morphological, rheological, and mechanical properties confirmed that a better miscibility between PA6 and LCP had been constituted in the presence of MWCNT-COOH.
LCP microfibrils appeared which indicated a better miscibility and strong interfacial adhesion between PA6 and LCP, in the existence of MWCNT-COOH, which contributes to superior mechanical properties.
The tensile mechanical properties for the different sample are listed in Table 2.
The homogenous dispersion of functionalized MWCNTs in the polymer matrix and the strong interfacial bonding among PA6, LCP and MWCNT-COOH might be the key factors for the improvements in the properties of the composites.
Moreover, studies on morphological, rheological, and mechanical properties confirmed that a better miscibility between PA6 and LCP had been constituted in the presence of MWCNT-COOH.
LCP microfibrils appeared which indicated a better miscibility and strong interfacial adhesion between PA6 and LCP, in the existence of MWCNT-COOH, which contributes to superior mechanical properties.
The tensile mechanical properties for the different sample are listed in Table 2.
The homogenous dispersion of functionalized MWCNTs in the polymer matrix and the strong interfacial bonding among PA6, LCP and MWCNT-COOH might be the key factors for the improvements in the properties of the composites.
Online since: July 2015
Authors: Wojciech Jurczak
The mechanical properties of the tested joints were supplemented with the Vickers hardness testing - HV5 determining the size of joint components (bonding region, heat-affected zone (HAZ), thermo-mechanically affected zone (TMAZ) and base material).
Hardness distribution measurements confirm the general distribution of mechanical properties in the tested joints.
In this way the approximate mechanical properties of the thin protective oxide layer on tested joints were determined.
Fig.7 shows the electrochemical-mechanical properties in the slow strain rate test of 7020 and 7020M alloy friction stir welded joints.
The mechanical properties of these joints are similar for both alloys and amount 340MPa.
Hardness distribution measurements confirm the general distribution of mechanical properties in the tested joints.
In this way the approximate mechanical properties of the thin protective oxide layer on tested joints were determined.
Fig.7 shows the electrochemical-mechanical properties in the slow strain rate test of 7020 and 7020M alloy friction stir welded joints.
The mechanical properties of these joints are similar for both alloys and amount 340MPa.
Online since: January 2013
Authors: Wei Yuan, Li Hua Xie, Gai Mei Zhang, Da Zhi Liao, Jian Dong Lu
Thickness and bottle diameter influence of the mechanical properties of PET beer bottles are obtained.
This article is to analyze the thickness of the PET beer bottles and bottle outside diameter of its mechanical properties.
It first analyzes thickness and bottle diameter of the mechanical properties of PET beer bottles.
Conclusion Through the structural analysis of PET beer bottle, that affect the bottle resistance to internal pressure strength of the main structural factors are the thickness of the bottle and the bottle diameter.
The mechanical properties and body diameter of PET beer bottle effects got analyzed.
This article is to analyze the thickness of the PET beer bottles and bottle outside diameter of its mechanical properties.
It first analyzes thickness and bottle diameter of the mechanical properties of PET beer bottles.
Conclusion Through the structural analysis of PET beer bottle, that affect the bottle resistance to internal pressure strength of the main structural factors are the thickness of the bottle and the bottle diameter.
The mechanical properties and body diameter of PET beer bottle effects got analyzed.
Online since: July 2015
Authors: Triyono Triyono, Yustiasih Purwaningrum, Muhammad Fathan
The physical properties were examined based on the microstructure using optical microscope while the mechanical properties were measured with respect to the strength and hardness using Universal Testing Machine and Vickers Microhardness respectively.
The amount of heat generated depends upon three factors: (1) the amperage, (2) the resistance of the conductor and (3) the duration of current.
These three factors affect the heat generated as expressed in the formula: (1) where Q is the heat generated (J), I the current (A), R the resistance of the work (Ω), t is the duration of current (s).
The peak load was evaluated to determine the mechanical properties of weld joint.
Hanninen, Exploring the Mechanical Properties of Spot Welded Dissimilar Joints for Stainless and Galvanized Steels, Welding Journal, December 2006 pp.305-313 [6] M.J.
The amount of heat generated depends upon three factors: (1) the amperage, (2) the resistance of the conductor and (3) the duration of current.
These three factors affect the heat generated as expressed in the formula: (1) where Q is the heat generated (J), I the current (A), R the resistance of the work (Ω), t is the duration of current (s).
The peak load was evaluated to determine the mechanical properties of weld joint.
Hanninen, Exploring the Mechanical Properties of Spot Welded Dissimilar Joints for Stainless and Galvanized Steels, Welding Journal, December 2006 pp.305-313 [6] M.J.