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Online since: July 2015
Authors: Zahurin Halim, Zuraida Ahmad, Noorasikin Samat, A.I.H.Dayang Habibah, N. Zulkapli
Study of Mechanical and Flammability Properties of Polypropylene /Microcrystalline Cellulose Composites Filled with Nano-sized Aluminium Hydroxide (ATH) Particles
N.
The mechanical properties of PP/MCC composites were characterized by tensile and impact tests while the flame properties were evaluated by UL-94 and oxygen index tests.
This problem would cause agglomeration of filler which normally lead to low mechanical properties of the polymer composite [6].
It is also noted the coupling agent did also affect the LOI and burning rate’s results; both flame retardancy properties are higher in samples with MAPP.
Mechanical and flame retardancy results also showed the effectiveness of MAPP coupling agent in improving both properties.
The mechanical properties of PP/MCC composites were characterized by tensile and impact tests while the flame properties were evaluated by UL-94 and oxygen index tests.
This problem would cause agglomeration of filler which normally lead to low mechanical properties of the polymer composite [6].
It is also noted the coupling agent did also affect the LOI and burning rate’s results; both flame retardancy properties are higher in samples with MAPP.
Mechanical and flame retardancy results also showed the effectiveness of MAPP coupling agent in improving both properties.
Online since: January 2022
Authors: Hoang Danh Pham, Minh Tuan Le, Ngoc Phuong Nguyen, Quang Minh Bui, Xuan Cuong Luu, Dinh Nhat Do, Xuan Tien Le
Juss.) is a plant with many useful properties that can be used in life.
Factors affecting the hydraulic press process to recover neem oil including pretreatment of raw material (whole seed, kernel); raw material moisture (3 ÷ 8%); pressing time (1 -15 minutes/turn); the number turn of presses (1, 2, 3), and pressing pressure (150 ÷ 210 kg/cm2), were examined in this study.
Pressing time was a factor that needs to be investigated as it directly affected oil recovery efficiency and operating costs.
Bandyopadhyay, Biological activities and medicinal properties of neem (Azadirachta indica), Curr.
Ajibola, Processing factors affecting yield and quality of mechanically expressed groundnut oil, J.Agric.
Factors affecting the hydraulic press process to recover neem oil including pretreatment of raw material (whole seed, kernel); raw material moisture (3 ÷ 8%); pressing time (1 -15 minutes/turn); the number turn of presses (1, 2, 3), and pressing pressure (150 ÷ 210 kg/cm2), were examined in this study.
Pressing time was a factor that needs to be investigated as it directly affected oil recovery efficiency and operating costs.
Bandyopadhyay, Biological activities and medicinal properties of neem (Azadirachta indica), Curr.
Ajibola, Processing factors affecting yield and quality of mechanically expressed groundnut oil, J.Agric.
Online since: April 2014
Authors: Peng Cheng Zhai, Li Sheng Liu, Ben Huang
Unfortunately, the poor mechanical properties caused by weak van der Waals bonding between Te1-Te1 layers of two adjacent quintuples does set a limitation to commercial applications.[2, 3] On the other hand, it seems that the mechanical properties of Bi2Te3 may play an important role in its production.
Though these negative factors may impact the deformation of breakage, they have mild effect on elastic stage.
Actually, all the calculated mechanical properties parameters and the stress-strain curves have been processed referred to the atomic configuration.
However, for shearing, though the direction of external load can affect the mechanical properties, it seems not to cause any transformation in the mechanism of deformation.
And other factors such as temperature effect and strain rate effect should be considered as well.
Though these negative factors may impact the deformation of breakage, they have mild effect on elastic stage.
Actually, all the calculated mechanical properties parameters and the stress-strain curves have been processed referred to the atomic configuration.
However, for shearing, though the direction of external load can affect the mechanical properties, it seems not to cause any transformation in the mechanism of deformation.
And other factors such as temperature effect and strain rate effect should be considered as well.
Online since: December 2014
Authors: Paulo Roberto Lopes Lima, Rogério de Jesus Santos
The 22 factorial design was used with two factors Lf and Nc , two levels and a midpoint.
Influence of cycles on mechanical properties of treated fiber and natural fiber Figure 10.
The variation of thickness and the curvature of the level curves show that there is a high interaction among the factors.
A study of the mechanical properties of short natural-fiber reinforced composites.
A study of the mechanical properties of short natural-fiber reinforced composites.
Influence of cycles on mechanical properties of treated fiber and natural fiber Figure 10.
The variation of thickness and the curvature of the level curves show that there is a high interaction among the factors.
A study of the mechanical properties of short natural-fiber reinforced composites.
A study of the mechanical properties of short natural-fiber reinforced composites.
Online since: November 2005
Authors: Jeong Woo Han, Seung Ho Han, Byung Chun Shin, Jae Hoon Kim
These stress intensity factors are also affected by the mutual
interactions between adjacent cracks.
Welded Joints, Their Geometrical Characteristics and Fatigue Properties Welded Joints.
Table 1 shows the chemical composition and mechanical properties obtained from the quasi-static tensile test.
Table 1 Chemical composition and mechanical properties of SM490B Chemical composition (mass contents in %) Mechanical properties C Mn P S Si Ni Cr Mo σy (MPa) UTS (MPa) Elongation (%) 0.155 1.304 0.017 0.010 0.423 0.032 0.038 0.018 0.423 0.032 0.038 ∆ ∆ ∆ (a) Cruciform joint (b) Cover plate joint (c) Longitudinal stiffener joint Fig. 1 Configuration of welded joints Geometrical Characteristics.
Fatigue Properties.
Welded Joints, Their Geometrical Characteristics and Fatigue Properties Welded Joints.
Table 1 shows the chemical composition and mechanical properties obtained from the quasi-static tensile test.
Table 1 Chemical composition and mechanical properties of SM490B Chemical composition (mass contents in %) Mechanical properties C Mn P S Si Ni Cr Mo σy (MPa) UTS (MPa) Elongation (%) 0.155 1.304 0.017 0.010 0.423 0.032 0.038 0.018 0.423 0.032 0.038 ∆ ∆ ∆ (a) Cruciform joint (b) Cover plate joint (c) Longitudinal stiffener joint Fig. 1 Configuration of welded joints Geometrical Characteristics.
Fatigue Properties.
Online since: September 2013
Authors: Jae Ik Cho, Young Chan Kim, Se Weon Choi, Cheol Woo Kim
Also, the alloy needs to have sufficient mechanical properties to minimize deformation after die casting.
Control of the alloying elements and their amount is important factors to have an alloy system for heat sink component.
The commercially pure aluminum with 99.7% purity and ADC12 were also examined to compare the thermal conductivity and mechanical properties.
Note that up to 2.0wt.% of each element and total of 1.6~2.7wt.% of alloying elements were not significantly affected the tensile properties of aluminum.
There are several important factors affecting the fluidity, such as melt and mold temperature, superheat etc., but their effects were not significant in die casting because it uses extremely high pressure to fill.
Control of the alloying elements and their amount is important factors to have an alloy system for heat sink component.
The commercially pure aluminum with 99.7% purity and ADC12 were also examined to compare the thermal conductivity and mechanical properties.
Note that up to 2.0wt.% of each element and total of 1.6~2.7wt.% of alloying elements were not significantly affected the tensile properties of aluminum.
There are several important factors affecting the fluidity, such as melt and mold temperature, superheat etc., but their effects were not significant in die casting because it uses extremely high pressure to fill.
Online since: September 2011
Authors: Ming Chuen Yip, Wei Jen Chen, Ming Yuan Shen, Chin Lung Chiang, Yi Luen Li
Creep Behavior and Mechanical Properties of Carbon Fiber Nano-Composites
Yi-Luen Li1,a, Ming-Yuan Shen1, b, Wei-Jen Chen1, c, Chin-Lung Chiang2, d and Ming-Chuen Yip*,1,e
1 Department of Power Mechanical Engineering, National Tsing Hua University, Hsin-Chu, Taiwan
2 Department of Safety, Health and Environmental Engineering, Hung-Kuang University, Taichung, Taiwan
ad550309@yahoo.com.tw, bhbj678@seed.net.tw, cd937716@oz.nthu.edu.tw,
ddragon@sunrise.hk.edu.tw, emcyip@pme.nthu.edu.tw
Keywords: Carbon fiber, Carbon nanotube, Creep, Findley power law
Abstract.
In recent years, it has been observed that surface modification of carbon nanotubes(CNTs)influences on CNT’s distribution among epoxy resin and affects the mechanical properties of CNTs.
This investigation studies the consequent enhancement of the mechanical properties of CNTs.
The influence of adding various proportions of CNTs to the epoxy resin on the mechanical properties of the composites thus formed is investigated, and the strength of the material is tested at different temperatures.
Base on the results shown in Figs.2(b), 3(b) and 4(b) for creep modulus, it displays that the strength of composites declines with the increase of the applied stress, temperature and humidity, and it also demonstrates that these are all factors critically influence on the creep behavior and the strength of composites.
In recent years, it has been observed that surface modification of carbon nanotubes(CNTs)influences on CNT’s distribution among epoxy resin and affects the mechanical properties of CNTs.
This investigation studies the consequent enhancement of the mechanical properties of CNTs.
The influence of adding various proportions of CNTs to the epoxy resin on the mechanical properties of the composites thus formed is investigated, and the strength of the material is tested at different temperatures.
Base on the results shown in Figs.2(b), 3(b) and 4(b) for creep modulus, it displays that the strength of composites declines with the increase of the applied stress, temperature and humidity, and it also demonstrates that these are all factors critically influence on the creep behavior and the strength of composites.
Online since: January 2010
Authors: Marek S. Weglowski, Sebastian Stano, Krzysztof Krasnowski, Miroslaw Łomozik, Krzysztof Kwiecinski, Robert Jachym
That results have shown the influence of bake hardening on the mechanical
properties of laser welded DP steel.
The mechanical properties are given in Table 1.
Low carbon lath martensite exhibits favourable mechanical properties in comparison to the brittle high carbon steel martensite.
One of the most important factors for the quality estimation of welded joints for the automotive industry is their fatigue resistance.
Dhooge: Hybrid laser welding of DP600 Dual Phase steel: microstructural and mechanical properties and joint preparation.
The mechanical properties are given in Table 1.
Low carbon lath martensite exhibits favourable mechanical properties in comparison to the brittle high carbon steel martensite.
One of the most important factors for the quality estimation of welded joints for the automotive industry is their fatigue resistance.
Dhooge: Hybrid laser welding of DP600 Dual Phase steel: microstructural and mechanical properties and joint preparation.
Online since: September 2016
Authors: Vincenzo Piluso, Elide Nastri, Paolo Castaldo
The proposed relationships are based on the numerical results coming from an extensive parametric analysis performed by means of FE code ABAQUS for different materials, which gain insight into the influence of all the geometrical and mechanical parameters affecting the ultimate behaviour.
Successively, by means of monovariate and multivariate non linear regression analyses, empirical relationships are provided in order to predict the rotation capacity of RHS aluminium alloy beams starting from their geometrical and mechanical properties.
In particular, both monovariate and multivariate non linear regression analyses have been carried out leading to relationships for predicting the rotation capacity of RHS aluminium alloy beams starting from geometrical and mechanical properties.
The relationships are based on the numerical results obtained by means of FE code ABAQUS through an extensive parametric analysis for different materials and different geometrical properties [22]-[23].
‘‘Factors affecting the rotation capacity of plastically designed members.’’
Successively, by means of monovariate and multivariate non linear regression analyses, empirical relationships are provided in order to predict the rotation capacity of RHS aluminium alloy beams starting from their geometrical and mechanical properties.
In particular, both monovariate and multivariate non linear regression analyses have been carried out leading to relationships for predicting the rotation capacity of RHS aluminium alloy beams starting from geometrical and mechanical properties.
The relationships are based on the numerical results obtained by means of FE code ABAQUS through an extensive parametric analysis for different materials and different geometrical properties [22]-[23].
‘‘Factors affecting the rotation capacity of plastically designed members.’’
Online since: May 2018
Authors: Nai Kui Gao, Hai Yun Jin, Peng Fei Gao, Sa Jia Liang, Ze Hua Pan, Zhi Wei Li, Cheng Lei Li
The degree of crystallinity of water-soaked cable insulating material is also increased, and the mechanical properties were deteriorated.
Relevant reports [3-8] showed that the environmental problems were the main factors which caused the cable to malfunction, such as the long-term humid environment.
A few reports had concerned on the influencing of water factor on the insulation properties of XLPE cable.
However, the investigations of above studies are more concerned about the electrical properties due to combined influencing factors of water, electro-thermal aging and so on.
Therefore, the thermal stress would develop under long-term temperature which would affect the physicochemical properties and crystal morphology.
Relevant reports [3-8] showed that the environmental problems were the main factors which caused the cable to malfunction, such as the long-term humid environment.
A few reports had concerned on the influencing of water factor on the insulation properties of XLPE cable.
However, the investigations of above studies are more concerned about the electrical properties due to combined influencing factors of water, electro-thermal aging and so on.
Therefore, the thermal stress would develop under long-term temperature which would affect the physicochemical properties and crystal morphology.