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Online since: November 2012
Authors: Yu Zhang, Bo Lu, Huai Kun Sun
Natural conditions that control these factors include the local and regional morphological and lithological setting.
The natural landslide media is in a state of non-saturated which the Infiltration properties and water holding characteristics greatly affects the rainfall infiltration rate.
Seepage properties of landslide 4.1 Geometrical models and mechanical parameters The finite element program of SEEP/W was applied to the analysis of seepage properties of landslide.
This rising line continues to expand, then the unsaturated region gradually reduced and infiltration gradient gradually increases, reducing the mechanical properties of the landslide.
The saturated region was generated and perched water was formed, which reduces the mechanical properties of the landslide
The natural landslide media is in a state of non-saturated which the Infiltration properties and water holding characteristics greatly affects the rainfall infiltration rate.
Seepage properties of landslide 4.1 Geometrical models and mechanical parameters The finite element program of SEEP/W was applied to the analysis of seepage properties of landslide.
This rising line continues to expand, then the unsaturated region gradually reduced and infiltration gradient gradually increases, reducing the mechanical properties of the landslide.
The saturated region was generated and perched water was formed, which reduces the mechanical properties of the landslide
Online since: October 2013
Authors: Yong Mei
The study shows: (1) the relative permeability can directly characterize the level of rock (coal) affected by mining; (2) in the vertical direction, the roof and floor have a wide range of relief, permeability increases and then decreases exponentially, affecting the range 30 ~ 40m; (3) overburden above the mined-out area damaged as an "O"-ring; (4) immediate roof obvious with a relief range of about 45 ~ 60m.
Introduction Coal seam permeability is affected by many factors, such as geological structure, stress state, seam depth, coal structure, coal quality characteristics, etc., and the combined effects is very complex [1], especially for surrounding rock in the mining process.
Physical and mechanical parameters of the strata are shown in Table 1.
Stress concentration factor close to 1.4, the peak stress occurs at a distance of approximately 10m to the coal face, and the range affected is about 30 ~ 40m.
Multiphase medium coal rocks (coal reservoirs) properties of physical simulation and numerical simulation [D].
Introduction Coal seam permeability is affected by many factors, such as geological structure, stress state, seam depth, coal structure, coal quality characteristics, etc., and the combined effects is very complex [1], especially for surrounding rock in the mining process.
Physical and mechanical parameters of the strata are shown in Table 1.
Stress concentration factor close to 1.4, the peak stress occurs at a distance of approximately 10m to the coal face, and the range affected is about 30 ~ 40m.
Multiphase medium coal rocks (coal reservoirs) properties of physical simulation and numerical simulation [D].
Online since: September 2013
Authors: Winarto Winarto, Gandjar Kiswanto, Ario Sunar Baskoro, A.A. Nugroho, D. Rahayu, Suwarsono Suwarsono
Where the variation of these parameters will affect to the mechanical properties of welds (as response) was the tensile load.
Further analysis of the interaction between the welds properties and Friction Stir welding process parameters to obtain the optimum response, carried out by applying Response Surface Methodology (RSM).
The variation of these parameters will affect to the mechanical properties (as response), i.e. the tensile strength of welds joint.
In many experimental conditions, it is possible to represent an independent factor in quantitative form as given in equation (1).
Then these factors can be considered as having a functional relationship or response as follows: (1) Between the response Y and x1, x2, ... , xk, factors quantitative k, the function Ф is called the response surface or the response function.
Further analysis of the interaction between the welds properties and Friction Stir welding process parameters to obtain the optimum response, carried out by applying Response Surface Methodology (RSM).
The variation of these parameters will affect to the mechanical properties (as response), i.e. the tensile strength of welds joint.
In many experimental conditions, it is possible to represent an independent factor in quantitative form as given in equation (1).
Then these factors can be considered as having a functional relationship or response as follows: (1) Between the response Y and x1, x2, ... , xk, factors quantitative k, the function Ф is called the response surface or the response function.
Online since: October 2011
Authors: Xiu De Wu, Xiong Wang
Importantly, none of the known biochemical regulatory factors and mechanical stimulation intensity has been shown in vitro [3, 4].
The culture medium recirculation control subsystem is consisted of a multi-channel peristaltic pump, twelve check valves, six scaffold chambers, and medium biochemical factors control subsystem.
The medium biochemical factors control subsystem was built to control the gas concentration of O2, CO2, and chemist components for all six scaffold chambers through platinum-cured silicon tubing gas exchanges, and keep the culture medium fresh (As described in [4] ).
The size, control cycle and its action process of the multidimensional strain for ligament tissue engineering are the main factors, which will impact the functions of mechanical stimulations.
In the advanced bioreactor for tissue engineering of ligament, the main factors that affect the size of stress are original available length of scaffold, the initial tensional position, stretching length, the twist angle, the mechanical properties and the length relaxation of scaffold, the size of load stress under maximum length or the largest twist angle, and the engineered tissue growth conditions, et al.
The culture medium recirculation control subsystem is consisted of a multi-channel peristaltic pump, twelve check valves, six scaffold chambers, and medium biochemical factors control subsystem.
The medium biochemical factors control subsystem was built to control the gas concentration of O2, CO2, and chemist components for all six scaffold chambers through platinum-cured silicon tubing gas exchanges, and keep the culture medium fresh (As described in [4] ).
The size, control cycle and its action process of the multidimensional strain for ligament tissue engineering are the main factors, which will impact the functions of mechanical stimulations.
In the advanced bioreactor for tissue engineering of ligament, the main factors that affect the size of stress are original available length of scaffold, the initial tensional position, stretching length, the twist angle, the mechanical properties and the length relaxation of scaffold, the size of load stress under maximum length or the largest twist angle, and the engineered tissue growth conditions, et al.
Online since: September 2016
Authors: You Tang Li, Lei Liu
The friction between the crack surface is very significant and it becomes the main influence factor of mechanical energy gradually[2].
Due to the interface crack is easily produced in joint with different properties of two materials, so the bi-material-interfacial cracks are the one of the key research of fracture theory.
Crack surface friction contact mechanics model The mechanical model of crack surface friction.
The mechanical model of crack surface friction is shown in Fig.2.
The a/w is 0.4-0.8[9,10] and the material property: E1=66.5 MPa, μ1=0.31, E2=206 MPa, μ2=0.3.
Due to the interface crack is easily produced in joint with different properties of two materials, so the bi-material-interfacial cracks are the one of the key research of fracture theory.
Crack surface friction contact mechanics model The mechanical model of crack surface friction.
The mechanical model of crack surface friction is shown in Fig.2.
The a/w is 0.4-0.8[9,10] and the material property: E1=66.5 MPa, μ1=0.31, E2=206 MPa, μ2=0.3.
Online since: September 2014
Authors: Milan Prokolab, Marko Ristic, Ivana Vasovic Maksimović, Zlatan Milutinovic, Bojan Gligorijevic
The main goal of this paper is to make the selection of optimal metalization procedures, group of filler materials and metalization technology definition, based on the results of structural and mechanical properties of samples, experimental model hardfacing.
Experimental research indicates a linear dependence of abrasive wear resistance and mechanical properties of materials.
Specifically, based on the mechanical properties, especially hardness can be predicted as behavior of metals in the conditions of wearing.
Microstructural components in proportion to its hardness, the relative share and distribution affect the level of resistance to wear. [2-4, 8] Based on previous research, the following factors can be concluded for the intensity of abrasive wearing affect: the nature and characteristics of the abrasive, aggressive working environment, the operating speed and load, and material properties of working parts, or their contact surfaces [2-4, 7, 8].
[2] Smith W.F., Structure and Properties of Engineering Alloys,"McGraw-Hill, Eds.
Experimental research indicates a linear dependence of abrasive wear resistance and mechanical properties of materials.
Specifically, based on the mechanical properties, especially hardness can be predicted as behavior of metals in the conditions of wearing.
Microstructural components in proportion to its hardness, the relative share and distribution affect the level of resistance to wear. [2-4, 8] Based on previous research, the following factors can be concluded for the intensity of abrasive wearing affect: the nature and characteristics of the abrasive, aggressive working environment, the operating speed and load, and material properties of working parts, or their contact surfaces [2-4, 7, 8].
[2] Smith W.F., Structure and Properties of Engineering Alloys,"McGraw-Hill, Eds.
Online since: May 2014
Authors: Guo Fu Gao, Zong Xia Fu, Jing Zhui Zhao, Yan Wang
In fact, the non-geometric part was main factors to influence surface roughness, Chinese scholars Wang yusu [7] summed up into four parts when analyzed non-geometric factors: The tool factors, work-piece material factors, cutting parameters factors and processing factors, all these factors in turn contain key consideration parameters [8].
The cutting parameters factors mainly include cutting dosage and line spacing.
When considering the impact of the non-geometric part, such as tool factors, work-piece material factors, cutting parameters factors, thermal coupling in cutting process, plastic deformation and elastic recoil, the main factors were considered and secondary factors were ignored, here the mainly factor to consider the machined surface residual height and the elastic-plastic deformation factor in work-piece cutting layer.
Based on the molecular- mechanical friction theory, made the following assumptions: the tool was rigid body, wear in the cutting process was ignored, from the work-piece’s material properties, according to the elastic-plastic deformation theory of machined surface, got the height difference of the plastic flow of machined surface, thereby a simplified model as shown in Figure 4 was established elastic-plastic deformation of work-piece surface.
Mechanical Engineer.10(2004) 3-6
The cutting parameters factors mainly include cutting dosage and line spacing.
When considering the impact of the non-geometric part, such as tool factors, work-piece material factors, cutting parameters factors, thermal coupling in cutting process, plastic deformation and elastic recoil, the main factors were considered and secondary factors were ignored, here the mainly factor to consider the machined surface residual height and the elastic-plastic deformation factor in work-piece cutting layer.
Based on the molecular- mechanical friction theory, made the following assumptions: the tool was rigid body, wear in the cutting process was ignored, from the work-piece’s material properties, according to the elastic-plastic deformation theory of machined surface, got the height difference of the plastic flow of machined surface, thereby a simplified model as shown in Figure 4 was established elastic-plastic deformation of work-piece surface.
Mechanical Engineer.10(2004) 3-6
Online since: January 2014
Authors: Wojciech Napadłek
Influence Environment and Parameters Ablative Laser Texturing
on Selected Properties Surface Layer Steel 100CrMnSi6-4
NAPADŁEK Wojciech
Military University of Technology, faculty of Mechanical Engineering,
Institute of Motor Vehicles and Transportation,
Gen.
These interactions can be considered separately from the physical properties of the lubricant (medium) and slot limiting surfaces (i.e. viscosity, wettability), as well as kinematical and dynamical relations between these factors.
Depending on the factors listed above, one can assume that these interactions may be advantageous or disadvantageous in the frictional resistance minimizing in the slide and rolling bearings slots.
In the tribological wear processes mass and structure (stereometry) changes, as well as physical properties of the co-working surface layers take place.
Napadłek, Influence of the laser hardening on the selected properties of steel.
These interactions can be considered separately from the physical properties of the lubricant (medium) and slot limiting surfaces (i.e. viscosity, wettability), as well as kinematical and dynamical relations between these factors.
Depending on the factors listed above, one can assume that these interactions may be advantageous or disadvantageous in the frictional resistance minimizing in the slide and rolling bearings slots.
In the tribological wear processes mass and structure (stereometry) changes, as well as physical properties of the co-working surface layers take place.
Napadłek, Influence of the laser hardening on the selected properties of steel.
Online since: June 2017
Authors: Qiu Yi Li, Jian Lin Luo, Song Gao, Xian Mao Wang
The modification of matrix is an important method to improve the mechanical properties of strain hardening cementitious composite (SHCC).
Consequently, it is important to cast SHCC carefully and make sure the even fiber distribution to insure the bridging function and mechanical properties of SHCC.
Therefore, the influence of the preparing processing factors including matrix water binder ratio (W/B), fiber distribution and fresh state rheology on SHCC behaviors are useful for the SHCC design.
However, there are many unknowns, which can affect the interfacial properties when the W/B varies.
Fiber could affect the fresh state properties of cementitious materials and therefore affect fiber distribution [2, 3], resulting in a poor composite ductility at fiber disconnection zone.
Consequently, it is important to cast SHCC carefully and make sure the even fiber distribution to insure the bridging function and mechanical properties of SHCC.
Therefore, the influence of the preparing processing factors including matrix water binder ratio (W/B), fiber distribution and fresh state rheology on SHCC behaviors are useful for the SHCC design.
However, there are many unknowns, which can affect the interfacial properties when the W/B varies.
Fiber could affect the fresh state properties of cementitious materials and therefore affect fiber distribution [2, 3], resulting in a poor composite ductility at fiber disconnection zone.
Online since: February 2018
Authors: Kaushik Kumar, Nisha Kumari
The purpose of the authors is to compare the mechanical properties of presently used aluminum calipers with polymeric thermoset based matrix (Carbon cloth with epoxy) based on CAD tools.
Thermoset based composites (carbon cloth with epoxy) has inherent properties such as higher strength, stiffness, lower-weight to volume ratio and lighter in weight.
Figure 2. 3D model of Side Supports of a commercially available Orthotic Braces/Calipers ANSYS workbench was used for the simulation and analysis of the mechanical properties such as total deformation, von-Mises stress and von-Mises Strain with taking into account the axial loading and the transverse loading.
Evaluation of the mechanical properties was done only to choose a material which will have more strength ad stiffness than the presently used calipers.
Chowdiah, Tensile and wear properties of Aluminum composites.Wear 255 (2003) 638-642
Thermoset based composites (carbon cloth with epoxy) has inherent properties such as higher strength, stiffness, lower-weight to volume ratio and lighter in weight.
Figure 2. 3D model of Side Supports of a commercially available Orthotic Braces/Calipers ANSYS workbench was used for the simulation and analysis of the mechanical properties such as total deformation, von-Mises stress and von-Mises Strain with taking into account the axial loading and the transverse loading.
Evaluation of the mechanical properties was done only to choose a material which will have more strength ad stiffness than the presently used calipers.
Chowdiah, Tensile and wear properties of Aluminum composites.Wear 255 (2003) 638-642