International Journal of Advanced Materials and Production(IJAMP)

Volume 1 (2016)

Preface

Contents

 

  • Axial Compression Properties FEA on RC Filled Double Skin Square Steel Tube Short Columns 01001

Song Bing and Li BaiShou

Published online: 24 December, 2016

 

Abstract:With calcined diatomite and vitrified micro bubbles (VMB) content as the main changing parameters, experiment studies the properties of VMB recycled concrete blocks; By using ANSYS, this article analyzes different width- thickness ratios(64,88),hollow rates (0,0.35) and VMB contents (80%,100%) influence on axial compression properties of the composite columns. The result shows that: while calcined diatomite content is 3%, the compressive strength of the 100% VMB content test block can reach 32.12 MPa; when the width-thickness ratio is same, stress distribution of hollow specimens is more balance than solid ones, and their axial displacement decreases by 3.5% compared with solid specimens when they reach ultimate bearing capacity, while the ultimate bearing capacity increases by 2%; according to calculation and comparison, this article gets the applicability of the various procedures when calculated the axial compression bearing capacity of recycled concrete filled double skin square steel tube short columns.

PDF

 

  • Development of Wearable Wrist Rehabilitation Device Using Flexible Pneumatic Cylinders and Embedded controller 01002

Naoki Kato, Shujiro Dohta, Tetsuya Akagi, Wataru Kobayashi and Yoshinori Moriwake

Published online: 24 December, 2016

 

Abstract:Recently, the rehabilitation devices using a soft pneumatic actuator for disabled are actively researched and developed because of the insufficient number of PT. In the previous study, the wrist rehabilitation device using flexible robot arm that consisted of three flexible pneumatic cylinders was proposed and tested. In this study, the wearable wrist rehabilitation device is proposed and tested. The attitude control based on the analytical model of the device is also carried out. As a result, it is confirmed that the device can trace the desired position in the condition when a human wears the device

PDF

 

  • 3D Quasi-passive Walking of Biped Robot with Flat Feet - Gait Comparison between Passive Walking and Quasi-passive Walking 01003

Akihiro Yamamoto, Shinsaku Fujimoto and Tetsuya Kinugasa

Published online: 24 December, 2016

 

Abstract:Currently, many bipedal robots have been proposed to realize the high energy efficiency walking. The control input isn’t required for the passive dynamic walking. Generally, a foot of passive dynamic walking robot is an arc foot. In this paper, it is intended to establish a control method and control mechanism to achieve the energy efficient and the stable gait. Therefore, we developed 3D quasi-passive walker with flat feet driven by an antagonistic pneumatic artificial muscle. An antagonistic mechanism is constituted by a pair of McKibben muscle. And, an antagonistic pneumatic system is used as joint actuators of linkage mechanisms which control the torque, joint stiffness and position simultaneously. This paper shows that the 3D quasi-passive walking in the level ground can realize by the swinging (simple) input of the frontal direction, and the stride of the robot is proportional to lateral-plane input. Finally, the gait of the bipedal robot is analyzed by COP (Center of Pressure) and ROS (Roll-Over Shapes).

PDF

 

  • Development of Electric Wheelchair with Consideration of Driving Environment-Control Method of Force Feedback Joystick 01004

Shinsaku FUJIMOTO, Keisuke SUGIHARA and Koji YOSHIDA

Published online: 24 December, 2016

 

Abstract:The purpose of this study is to realize the high function of an electric wheelchair with the consideration of the driving environment. The orientation sensor is used to comprehend the driving environment. The estimated method can be obtained unknown parameters of the driving environment by the orientation sensor. The developed electric-wheelchair operates by the force-feedback joystick. When the marketed wheelchairs drive on the slope or the side-slope, the wheelchairs flow to the slope lower direction. In this case, the wheelchairs might go to roadway side in JAPAN, and such situations are very dangerous. The force-feedback joystick is developed to avoid dangerous situation. Therefore, the force-feedback joystick is combined with the orientation sensor to the force-feedback of joystick. The effectiveness of the force-feedback joystick is confirmed by comparison experiments with the control performance of the wheelchair without the force feedback. Finally, this study is expected to be useful to social welfare in the future

PDF

 

  • A New Low Thermal Conductivity high temperature vacuum insulation composites with SiC Foam Core 01005

Zhaofeng Chen, Yang Wang and ShengJie Yu

Published online: 24 December, 2016

 

Abstract:With regards to the adiabatic principle for insulation, a new high-temperature vacuum insulation composites (HT-VIC) is put forward, which can be used in high temperature environment. Carbon fiber reinforced carbon composites have excellent high temperature resistance, high toughness, corrosion resistance and good thermal stability, etc. SiO2 can be used to fill the microcrack and protect the carbon matrix from oxidizing. For this material, it is consisted of core material which is SiC foam ceramic and the flawless outer shell layer of carbon fiber reinforced composites by the methods of CVI (Chemical Vapor Infiltration) and silica sol vacuum impregnation, in the meantime the inside is a vacuum state. So the new ultra-temperature vacuum insulation composites with novel structure not only can be used at high temperature, but also has a very low coefficient of thermal conductivity compared with C/C and C/SiC composites. Material density is 0.81g/cm3, the effective thermal conductivity of UT-VIC ranged from 0.193 W/mK to 0.721 W/mK in 303K to 724K temperature, and the compression strength is 1.5 MPa. The aim of this paper is to investigate and analyze the effect of material structures and presents a possible future high temperature resistance vacuum insulation material.

PDF

 

  • Mechanical property of AZ61/nano-Al2O3p ECAEed MMCs 01006

Song-Jeng Huang, Cheng-Shiun Tsai, Po-Chou Lin, M. Besterci and Beata Ballokova

Published online: 24 December, 2016

 

Abstract:The effect of equal channel angular extrusion (ECAE) on the mechanical behavior of AZ61/Al2O3p magnesium metal-matrix nanocomposites was investigated. ECAE is a useful technique to produce bulk nano-structured materials through severe plastic deformation. The present magnesium metal matrix composites (Mg MMCs) with 1, 2, and 5 wt% nano-sized Al2O3 particles for ECAE were fabricated using stir-casting method. The significantly enhanced mechanical behavior of AZ61/Al2O3p magnesium metal-matrix nanocomposites at room temperature, for instance, yield strength (YS), ultimate tensile strength (UTS) and ductility, can be obtained after ECAE process. AZ61/5wt% Al2O3p MMCs ECAEed exhibits the maximum ultimate strength up to 335Mpa, whereas AZ61 MMCs (with addition of 0, 1, 2, 5 wt% Al2O3) have tensile strength of about 200 - 240Mpa

PDF

 

  • Synthesis and Characterization of Advanced PBXs Materials Based on GAP and HTPB 01007

Karim Elsharkawy and Hany Fouda

Published online: 24 December, 2016

 

Abstract:This paper describes formulations of plastic bonded explosives (PBXs) based on three highly brisant explosives, namely (RDX, PETN, and HMX) with polyurethane (PU) based on Glycidyl azide polymer (GAP) as an energetic binder and hydroxy terminated polybutadiene (HTPB) as an inert binder in comparison with composition-B, which used in the fragmentation warheads. The performance properties of PBXs were evaluated by both thermochemical calculations and experimental results of prepared selected PBX compositions. Performance parameters of the selected PBXs were evaluated by using the EXPLO5 computer program. The sensitivity and performance properties of different types of PBXs were evaluated by experimental results of prepared selected PBX compositions. Casting technique was used to prepare the selected compositions containing 14% PU based on GAP and HTPB. The results of the prepared selected compositions were emphasized by the thermochemical calculations. It has been observed that the brisance of the PBX based on HMX and GAP was higher than that of comp-B by 21.3 %, the detonation velocity showed a remarkable increase of the order of 8480 (m/s) while that of comp-B was 7638 (m/s). A controlled fragmentation warhead with an outer grooving warhead case of dimensions 100x35x4 mm was used and arena test was carried out to determine the lethal zone of the fragmentation warhead. The lethal zone obtained from arena test for PBX composition based on HMX and GAP named PBXHG4 was higher than the other prepared PBX formulations based on GAP and than that of comp-B by 40%.

PDF

 

  • Experimental Studies on Improved CF Composite Material and Study Effect of Addition Fumed Silica 01008

Hany Fouda and Karim Elsharkawy

Published online: 24 December, 2016

 

Abstract: In the present investigation, we used two types of thermoset resins (epoxy resin and phenol formaldehyde resin) with carbon fiber (CF) to produce composite materials. CF/epoxy resin composite and CF/phenolformaldhyde resin composite were fabricated and compared between their mechanical properties as compression, tension and flexural. it was found that mechanical properties of CF/epoxy composite higher than mechanical properties of CF/phenolformaldhyde resin composite such as flexural strength of CF/epoxy resin composite increased by 30 % than flexural strength of CF/phenolformaldhyde resin composite, tensile strength of CF/epoxy resin composite increased by 11.4 % than flexural strength of CF/phenolformaldhyde resin and axial compression strength of CF/epoxy resin composite increased by 14.5 % than flexural strength of CF/phenolformaldhyde resin. In the same time the effect of addition of nano-scale fine particles as fumed silica to CF/epoxy resin composite on mechanical properties was studied. It was found that mechanical properties of CF/epoxy composite decreased after addition of nanoscale particles of fumed silica as flexural strength decreased by 26% due to addition of fumed silica

PDF

 

  • Direct Competitive Chemiluminescence Immunoassays Based on Gold Magnetic for Ultrasensitive Detection of Chloramphenicol 01009

Lin yu Wang, Manwen Yao, Xiangyi Fang, Peng Tang and Xiangyi Fang

Published online: 24 December, 2016

 

Abstract:Chemiluminescent immunoassays (CLIA) based on gold magnetic nanoparticles (Au-MNPs) were developed for rapid analysis of chloramphenicol (CAP) in milk sample. Anti-CAP antibodies were immobilized on the surfaces of Au-MNPs, luminol (Method I) and 2',6'-DiMethylcarbonylphenyl-10-sulfopropylacridinium-9-carboxylate 4'-NHS Ester, (NSP-DMAE-NHS, Method II) were exploited in competitive CLIA for CAP detection in milk using a homemade luminescent measurement system. The sensitivities and limits of detection (LODs) of the two methods were obtained according to the inhibition curves. It indicated that NSP-DMAE-NHS as luminescence reagent (reaction II) was more sensitive and effective than luminol (reaction I). The LOD of reaction II reached 0.008 ng/ml while it was 4 ng/ml in reaction I. Moreover, the linear range of the inhibition curve of the former was wider than that of the latter. Such results indicated that the proposed CLIA stratery employing NSP-DMAE-NHS was more sensitive than other immunoassay method for CAP detection.

PDF

 

  • First-principles calculations of CaMg2 Alloy Phase to predict its Electronic and Elastic Properties 01010

Jia Fu, Weihui Lin and Zhongren Chen

Published online: 24 December, 2016

 

Abstract:The influencing effect of pressure on structural, elastic and electronic properties of CaMg2 Laves phase is mainly investigated. The optimized structural parameters at zero pressure are a=b=6.250Å, c=10.101Å, which has good agreement with the experimental and theoretical values. The elastic constants are calculated, and then the bulk modulus, shear modulus, Young’s modulus, Poisson’s ratio and anisotropy factor are determined. The results show that the applied pressure is beneficial to the elastic properties of CaMg2. The analysis of electronic density of states (DOS) and Mulliken electron population reveal the bonding characteristics in CaMg2 crystal. Finally, the Debye temperatures under different pressures are obtained from the average sound velocity.

PDF

 

 

Full Paper
sub@ijamp.org

Please submit the full paper via email above.

Join as Reviewer

If you are interested in becoming a reviewer, please complete the Application Form and send it to: