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Online since: September 2013
Authors: Wibowo Harso Nugroho, Hana Catur Wahyuni, Prantasi Harmi Tjahjanti
Physics and Chemistry Test on Aluminum-Based Composite Materialsas an Alternative Material for The Manufacture of Brake Drum Tjahjanti P.H1a, Nugroho W.H2b, Wahyuni H.Cc 1Department of Mechanical Engineering, University of Muhammadiyah Sidoarjo (UMSIDA), Sidoarjo, Jawa timur, Indonesia 2BPPT Lab.
Cast iron, cast iron and cast steel is special have high density, thus resulting in a total weight of the vehicle to rise, and will affect the rate of the vehicle.
The results obtained are the mechanical properties showed that the addition of brake drum highest with added SiC composition (15%), causing increase resistance level wear, hardness and impact toughness in receiving shocks.
Tests carried out using machine Thermal Analyzer Dilatometric brands Harrop Model: FY 5712 -700 series with the sample length (Lo) of at least 60 mm, the correction factor / Gain (A) 5 and the temperature change DT = 25oC.
Online since: January 2016
Authors: Marius Catana, Dan Tarnita, Daniela Tarniţă, Dan Calafeteanu, Daniel Calin
The effects of antero-posterior tibial slope developed during tibial resection in total knee arthroplasty were studied as an important factor in the knee biomechanics [14-18].
Prosthesis-knee joint with anterior-posterior slope of 0o with varus slope:a) 176o; b) 191o To achieve the 3D virtual models of joint-prosthesis assembly presenting varus slope of 191o the following approach for calculating the angle between the tibia and femur was used: the mechanical axis of the tibia is kept in the same position; the mechanical axis of the femur was inclined with 15o.
Materials properties for knee-prosthesis components [18] Component Young’s Modulus [Mpa] Poisson’s Ratio Femur 17600 0.3 Tibia 12500 0.3 Femoral component 210000 0.3 Tibial component 210000 0.475 Polyethylene component 1100 0.42 Results Using AnsysWorkbench 15.07 software [3,4,7,18], the numerical simulations and Finite Element Method analyses were processed for the eight analysed cases of knee joint-prosthesis assemblies with antero-posterior slope of 0o and 5o respectively.
Tarnita, Modeling and finite element analysis of the human knee joint affected by osteoarthritis, Key Engineering Materials, 601 (2014) 147-150
Online since: January 2014
Authors: Hui Chen, Bing Ma, Li Zhen Liu, Xue Feng Bai, He Wang, Li Wei Yang, Chong Wang, Shi Nan Li, Lu Ning Yu
Study of temperature field distribution and deformation of chain link based on Pro/E Bing Ma1,Lizhen Liu1,Xuefeng Bai1,He Wang1,Liwei Yang1, Chong Wang2,Shinan Li2,Luning Yu2, Hui Chen2,a 1Shenyang Sujiatun District Occupation Education Center, Shengyang, China, 110102. 2School of Traffic and Mechanical Engineering, Shenyang Jianzhu University,Shengyang, China,110168.
Establishment of the Chain Link Model The model of the chain link with two wings is shown as Figure 1.Since it is non-standard, its dimension is shown as Table 1.In Pro/Mechanica-Thermal module, we set the material as high alloy-structural steel 1Ci18Ni9Ti , the properties of which are: density =7.85 t/m3, Poisson's ratio =0.28, elastic modulus =200Gpa, tensile strength =539MPa, yield strength =196MPa, heat capacity=450J/(kg·℃), thermal conductivity of 55 W/m·K[9-12].
(2) where q is the rate of heat flow for convection,h is the conduction factor,A is the area of convection, is the temperature of the surface, is the overall temperature.
The red areas on the edge of the ends, which indicate that there is stress concentration with the maximum of 224MPa , are because of chamfer missing of the model for simplifying purpose and do not affect the analysis.
[9] Zhang Tiejun: Mechanical Engineering Materials (Peking university press,Beijing 2010), p.138-139
Online since: February 2011
Authors: Kang Yan, Tian Zou, Xin Lei Zhang, Yun Feng Mei, Wei Feng
Introduction Helical gears are widely used as an important transmission component in most of the mechanical and automotive industry applications.
In recent years, there has been attracting more and more applications in the production of gears by the precision forming technique owing to its well-known advantages compared with conventional cutting methods,such as the excellent mechanical properties, less material wastage,good tolerance, high productivity and cost savings[1,2].
The process conditions in the FE-simulation are:(1) elastic deformation is negligible and all the dies are regarded as the rigid body and the billet is the deformed body;(2) the friction at the billet-dies interfaces was assumed to be of shear type and friction factor is assumed to be 0.12; (3) the initial tetrahedral solid elements of the forged billet are around 100000, and automatic remeshing technique was adopted during simulation as shown in Fig.1(c); (4) the mesh density around the teeth is considered higher to improve the deformation accuracy in these area; (5)the temperature of environment is the room temperature 20°C and the punch working speed is about 10mm/s; (6)the governing equations do not consider the volume force and satisfy the equilibrium equation, the geometrical equation, and the material obey the Mises yield criterion.
These indicate that the billet optimization method proposed in this study is effective and the following conclusions can be drawn:(1)The initial billet diameters of relief-hole affect the uniformity of deformation; (2)Through comparison, it can be obtained that the deformation is more uniform when billet with relief-hole is adopted. (3) The degree of uniformity of effective strain in the forging obtain arrives the optimal value when the initial billet diameter of relief-hole is equal to 12.4mm.
Online since: November 2015
Authors: Bi Jia Wang, Lu Yi Chen, Xin Hui Ruan, Jian Gang Chen, Su Xin Xu, Yi Qi Yang
The observed trends suggested that the final dye uptake was affected by two different factors, namely dye adsorption and dye reactivity.
Fig. 7 Build-up properties of Blue19 in solvent dyeing and in aqueous dyeing.
Blue19-VS exhibit good build up properties in solvent dyeing with K/S value as high as 31.
It was also found that solvent dyeing gave better dye build-up properties compared with aqueous dyeing.
Koenig, Effect of dimethyl sulfoxide on chemical and physical properties of wool, Text.
Online since: October 2011
Authors: T.G. Amile, M.O. Isikwue
The major factors affecting water erosion are climate, topography, vegetation and soil.
Some of these erosion causing factors cannot be directly controlled, their effects may only be modified indirectly [1].
It has been pointed out by [2] that the major climatic factors influencing runoff and erosion are rainfall (most important), temperature, and wind.
The input parameters are the altitude coordinates of the initial slope profiles, the surface and soil properties and the vegetation cover of the slope.
Climatic factors like precipitation and runoff, as well as degree of slope and canopy cover greatly influenced the process of soil erosion.
Online since: February 2021
Authors: H. Çimenoğlu, Šárka Houdková, Shaikh Asad Ali Dilawary, Amir Motallebzadeh
Factors like cost, better understanding and control of the material’s properties make alloy steels as commercially the most widely used hardfacing alloys [10].
Top zone is called laser melting zone (LMZ), second zone is called partially melted zone (PMZ) and third zone is referred to as heat affected zone (HAZ).
These zones are characterised as laser melted zones (LMZ), partially melted zone (PMZ) and heat affected zone (HAZ).
These microstructural changes have direct bearing on the mechanical properties.
The LSM of both M2 and Mo alloyed M2 HSS introduces three distinct zones near the surface namely laser melted zone (LMZ), partially melted zones PMZ and heat affected zone (HAZ).
Online since: April 2004
Authors: G.S. Was, B. Alexandreanu, J. Busby
Cass Avenue, Argonne, IL 60439, USA Keywords: Grain boundary, Deformation, IGSCC, Austenitic alloys, Strain, Stacking fault energy ABSTRACT Grain boundary properties are known to affect the intergranular stress corrosion cracking (IGSCC) and irradiation assisted stress corrosion cracking behavior of austenitic alloys in high temperature water.
In fact, these three factors constitute the universally agreed-upon pre-requisites for stress corrosion cracking.
Further, deformation interaction with grain boundaries may be a unifying factor in IGSCC of both unirradiated and irradiated alloys.
The correlations are also unable to account for several of the minor elements and therefore may deviate substantially from the true SFE in cases where minor elements carry high weighting factors (such as Si).
However, the Gerber and Garud [27,28] strain rate damage model identifies strain rate rather than stress as the principal mechanical variable in driving stress corrosion cracking.
Online since: September 2024
Authors: Aldrin D. Calderon, Jhon Carlo P. Bajaro
However, due to the specific properties of thermal pictures, such as low texture and severe distortion, effectively registering these images into BIM is difficult.
Both the BIM and the real-scene 3D model exhibit obvious rigid-body features, and both models exhibit good geometric properties that aid in detecting the point pair connection.
There are various flaws that might affect the precision of the fusion technique.
In addition, the incorporation of BIM into energy auditing will be of great assistance to auditors because it will allow them to save time without adversely affecting the precision of the data that is gathered.
Song, A modified ICP algorithm based on dynamic adjustment factor for registration of point cloud and CAD model, Pattern Recogn.
Online since: February 2014
Authors: Wei Qun Liu, Ting Song, Yu Shou Li, Shu Fei Zheng, Jing Yang
Introduction The crude strata stress without geotechnical excavation, or the initial in-situ stress plays an important role in engineering analysis, because it not only affects mechanical properties of rock mass, but also directly causes the deformation and destruction.
We took a group of boundary load factors as the training samples.
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