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Online since: September 2007
Authors: Zi Chen Chen, Wen Wang, Guo Shun Ji, Yan Jun Huang
The analysis results indicate the mechanical property of the body of the developed machine can
meet the requirements for high speed cutting.
There are many questions brought about by aforementioned difficulties need dealing with, here, static and dynamic force affecting on the body of cutting machine were discussed only.
In order to realize high speed cutting for leather materials, the stiffness of the body of cutting machine tool is the key factor to it.
After that, It was found the natural frequency of the cutting machine tool is greatly affected by the local vibration frequency of supporting bar, it is shown in figure 5 and 6.
Yang: ANSYS for Engineering Application, Mechanical Issue.
There are many questions brought about by aforementioned difficulties need dealing with, here, static and dynamic force affecting on the body of cutting machine were discussed only.
In order to realize high speed cutting for leather materials, the stiffness of the body of cutting machine tool is the key factor to it.
After that, It was found the natural frequency of the cutting machine tool is greatly affected by the local vibration frequency of supporting bar, it is shown in figure 5 and 6.
Yang: ANSYS for Engineering Application, Mechanical Issue.
Online since: August 2019
Authors: Gianmarco de Felice, Stefano de Santis, Garis Lorenzo Di Noia, Pietro Meriggi, Marika Volpe
Natural accelerograms were applied with increasing scale factor to collapse.
The arrangement of the units, the mechanical properties of the materials, the presence of openings, the construction details and the horizontal thrusts transferred by vaults or by the roof are some of the main features that affect the seismic performance of existing masonry structures.
Natural accelerograms were applied in horizontal and vertical directions, with increasing scale factor to collapse.
Structural details (shaped mesh elements at the corners, FRP connectors, grid spacing of the fabric and mechanical properties of the matrix) also play a crucial role and need to be designed carefully.
Borri, Properties of aged GFRP reinforcement grids related to fatigue life and alkaline environment, Appl.
The arrangement of the units, the mechanical properties of the materials, the presence of openings, the construction details and the horizontal thrusts transferred by vaults or by the roof are some of the main features that affect the seismic performance of existing masonry structures.
Natural accelerograms were applied in horizontal and vertical directions, with increasing scale factor to collapse.
Structural details (shaped mesh elements at the corners, FRP connectors, grid spacing of the fabric and mechanical properties of the matrix) also play a crucial role and need to be designed carefully.
Borri, Properties of aged GFRP reinforcement grids related to fatigue life and alkaline environment, Appl.
Online since: November 2012
Authors: Wei Xiong Wang, Xin Hua Wang, Ai Hua Jiang, Bai Qing Liu, Kai Qi
Since there is a considerable scatter in the data, a reduction factor is often applied to the S-N curves to provide conservative values for the design of components.
Of course, environmental conditions, load history, statistical aspects, and safety factors must be incorporated in this methodology for remaining fatigue life assessment.
After idealizing the detected defection, relevant stress intensity factor will be gained via calculation or fatigue handbook.
Furthermore, material properties such as young modulus, tensile strength, yield strength and fracture tough and so on can be obtained via tests.
Transactions of the American Society of Mechanical Engineers, (1963), p. 528-534
Of course, environmental conditions, load history, statistical aspects, and safety factors must be incorporated in this methodology for remaining fatigue life assessment.
After idealizing the detected defection, relevant stress intensity factor will be gained via calculation or fatigue handbook.
Furthermore, material properties such as young modulus, tensile strength, yield strength and fracture tough and so on can be obtained via tests.
Transactions of the American Society of Mechanical Engineers, (1963), p. 528-534
Online since: February 2014
Authors: Monica Valdés, Giovanna Concu, Barbara de Nicolo, Nicoletta Trulli, Luisa Pani
The problem of estimating mechanical properties of buildings materials is a major issue in civil engineering, especially when dealing with existing structures.
Introduction When dealing with existing building structures, or with buildings materials quality control, Non Destructive Testings (NDT) are powerful tools for evaluating mechanical parameters of materials and structures without affecting buildings functionality and serviceability.
It has been noticed, for example, that moisture content leads to an underestimation of Ir and to an overestimation of V; similarly, concrete age leads to Ir increasing and V decreasing; concrete carbonation adversely affects Ir, which increases becoming less representative of the strength.
The parameter a represents a scaling factor, while the parameters b and c correspond to strength percentage variations induced by a unitary percentage variation of experimental values of V and Ir respectively.
Introduction When dealing with existing building structures, or with buildings materials quality control, Non Destructive Testings (NDT) are powerful tools for evaluating mechanical parameters of materials and structures without affecting buildings functionality and serviceability.
It has been noticed, for example, that moisture content leads to an underestimation of Ir and to an overestimation of V; similarly, concrete age leads to Ir increasing and V decreasing; concrete carbonation adversely affects Ir, which increases becoming less representative of the strength.
The parameter a represents a scaling factor, while the parameters b and c correspond to strength percentage variations induced by a unitary percentage variation of experimental values of V and Ir respectively.
Online since: April 2018
Authors: Radovan Holubek, Peter Košťál, Daynier Rolando Delgado Sobrino, Jana Moravčíková
The AWJM technology is generally used for harder and heavier machinable materials like thick sheets, composite materials with metal and ceramic properties and others within these categories to just cite a few.
The contribution is mainly focused on the analysis of the surface properties of the steel S235 after the cutting process, and this depending on the cutting speed of the water jet.
Water Jet Cutting The water jet technology is currently used mainly for the cutting and machining of materials with special mechanical properties such as titanium alloy [3], hard-to-machine materials and alloys [4], as well as glass, graphite, ceramic, plastics, and many composites [5].
Similarly, the cutting process is also influenced by several other peculiarities and properties of the materials [16].
South, Optimization Factors in Abrasive - Waterjet Machining, J.
The contribution is mainly focused on the analysis of the surface properties of the steel S235 after the cutting process, and this depending on the cutting speed of the water jet.
Water Jet Cutting The water jet technology is currently used mainly for the cutting and machining of materials with special mechanical properties such as titanium alloy [3], hard-to-machine materials and alloys [4], as well as glass, graphite, ceramic, plastics, and many composites [5].
Similarly, the cutting process is also influenced by several other peculiarities and properties of the materials [16].
South, Optimization Factors in Abrasive - Waterjet Machining, J.
Online since: May 2022
Authors: Antonella Sola, Cesare Signorini, Miriam Hanuskova, Mauro Zapparoli
The mechanical properties of the TRM samples were significantly increased by up to 20%, and the
peak load was attained at a higher deformability level, which is a clue of the enhanced ductility of the
reinforced elements.
For this reason, the use of biomass ashes turns out to be highly beneficial for reducing the content of Portland cement in cementitious conglomerates and composites [24], which is expected to boost the design and optimisation of mortar and concrete formulations with high recycled fractions and good mechanical properties.
This was done to figure out the effect of the composite coating on the SSA of the fabric, which is one of the governing factors on the matrix-reinforcement interaction.
Kiattikomol, Influence of pozzolan from various by-product materials on mechanical properties of high-strength concrete, Construction and Building Materials 21 (7) (2007) 1589-1598
Carloni, The role of the fiber-matrix interfacial properties on the tensile behavior of FRCM coupons, Construction and Building Materials 265 (2020) 120263
For this reason, the use of biomass ashes turns out to be highly beneficial for reducing the content of Portland cement in cementitious conglomerates and composites [24], which is expected to boost the design and optimisation of mortar and concrete formulations with high recycled fractions and good mechanical properties.
This was done to figure out the effect of the composite coating on the SSA of the fabric, which is one of the governing factors on the matrix-reinforcement interaction.
Kiattikomol, Influence of pozzolan from various by-product materials on mechanical properties of high-strength concrete, Construction and Building Materials 21 (7) (2007) 1589-1598
Carloni, The role of the fiber-matrix interfacial properties on the tensile behavior of FRCM coupons, Construction and Building Materials 265 (2020) 120263
Online since: January 2012
Authors: Masaki Tanaka, Kenji Higashida, Tomotsugu Shimokawa
Hence, we
can estimate the local stress intensity factor k caused by disclination shielding using the following
equation[9].
When grain boundaries exist around crack tips, impinged lattice dislocations at grain boundaries can also affect the mechanical properties of the crack tip, so the effect of impinged lattice dislocations on the mechanical field around the crack tip can be called grain-boundary shielding as shown in Fig. 1(c)[2].
Table 1 shows local stress intensity factors kdiscli caused by dislcination dipoles estimated using Eq. (2), and we can confirm that disclination shielding effect increases with adc keeping the Frack vector ω.
It can clearly be seen that the stress intensity factor kdiscli and ¯σdiscliz caused by a disclination dipole increases linearlyTable 1: Local stress intensity factors caused by dislication dipole, kdiscli, the dislocation-dislocation interaction forces, fdd', local and applied stress intensity factors and applied stresses for the first dislocation emission from the crack tip, k1ste , K1ste and σ1sta , which are calculated by linear elastic theory, for each model.
Before tensile simulations for atomic models, we first estimate the local stress intensity factors k1ste and applied stresses σ1sta required for the first dislocation emission from the crack tip using linear elastic theory.
When grain boundaries exist around crack tips, impinged lattice dislocations at grain boundaries can also affect the mechanical properties of the crack tip, so the effect of impinged lattice dislocations on the mechanical field around the crack tip can be called grain-boundary shielding as shown in Fig. 1(c)[2].
Table 1 shows local stress intensity factors kdiscli caused by dislcination dipoles estimated using Eq. (2), and we can confirm that disclination shielding effect increases with adc keeping the Frack vector ω.
It can clearly be seen that the stress intensity factor kdiscli and ¯σdiscliz caused by a disclination dipole increases linearlyTable 1: Local stress intensity factors caused by dislication dipole, kdiscli, the dislocation-dislocation interaction forces, fdd', local and applied stress intensity factors and applied stresses for the first dislocation emission from the crack tip, k1ste , K1ste and σ1sta , which are calculated by linear elastic theory, for each model.
Before tensile simulations for atomic models, we first estimate the local stress intensity factors k1ste and applied stresses σ1sta required for the first dislocation emission from the crack tip using linear elastic theory.
Online since: December 2014
Authors: Shu Fang, Yan Xu, Jian Qiao Fu
A reasonable structure and safety factor should be considered[3][4].
The material properties are as follow: Yield strength: 2.82685e+008 N/m^2, Tensile strength: 5.85e+008 N/m^2, Elastic modulus: 2.05e+011 N/m^2, Poisson ratio: 0.29, Mass density: 7850 kg/m^3, Shear modulus: 8e+010 N/m^2, Thermal expansion coefficient: 1.1e-005 /Kelvin.
The deformation of the component is extremely small, and do not affect the normal run of the robot. 3.
Reliability sensitivity analysis on influence of vertical force to mechanical property of lower cross arm suspension[J].
Lateral Mechanical Analysis and Stress Surveying of Piston Rod for Vehicle Strut Shock Absorber[J].
The material properties are as follow: Yield strength: 2.82685e+008 N/m^2, Tensile strength: 5.85e+008 N/m^2, Elastic modulus: 2.05e+011 N/m^2, Poisson ratio: 0.29, Mass density: 7850 kg/m^3, Shear modulus: 8e+010 N/m^2, Thermal expansion coefficient: 1.1e-005 /Kelvin.
The deformation of the component is extremely small, and do not affect the normal run of the robot. 3.
Reliability sensitivity analysis on influence of vertical force to mechanical property of lower cross arm suspension[J].
Lateral Mechanical Analysis and Stress Surveying of Piston Rod for Vehicle Strut Shock Absorber[J].
Online since: April 2022
Authors: Kai Sun, Rong Deng Liu, Yun Tao Liu, Tian Fu Li, Li Zhang, Zi Jun Wang, Dong Feng Chen
In fact, TiN/AlN multilayers coatings provided significant advancements in mechanical properties like wear resistance and tribological performance [2, 14, 15], which were due to the restriction of the dislocation propagation, the strain in the lattice-mismatched materials and the Koehler’s effect [16].
Of course, the interface roughness was also affected by other factors, such as the growth behavior and temperature.
Helmersson, Growth, structural characterization and properties of hard and wear-protective layered materials, Thin Solid Films, 193-194 (1990) 818-831
Levy, Enhancement of mechanical properties of TiN/AlN multilayers by modifying the number and the quality of interfaces, Surface and Coatings Technology, 124 (2000) 210-221
Mayrhofer, Thermal conductivity and mechanical properties of AlN-based thin films, Journal of Applied Physics, 119 (2016) 225304
Of course, the interface roughness was also affected by other factors, such as the growth behavior and temperature.
Helmersson, Growth, structural characterization and properties of hard and wear-protective layered materials, Thin Solid Films, 193-194 (1990) 818-831
Levy, Enhancement of mechanical properties of TiN/AlN multilayers by modifying the number and the quality of interfaces, Surface and Coatings Technology, 124 (2000) 210-221
Mayrhofer, Thermal conductivity and mechanical properties of AlN-based thin films, Journal of Applied Physics, 119 (2016) 225304
Online since: July 2015
Authors: Noor Amira Sarani, Aeslina Abdul Kadir
The factors such as increasing of growing population, daily and industrial activities will lead to these phenomena.
The results demonstrated that, in terms of physical and mechanical properties, CB Brick (2.5%) at 1°C/min improved the most and leached low heavy metals.
According to the previous results of physical and mechanical properties, TCLP was conducted because CB Brick contains high heavy metals compared to Clay Brick (0% CBs).
In this stage, by comparing with different percentages of CBs, CB Brick (2.5%) at 1°C/min yields the optimal performance in terms of physical and mechanical properties of manufactured brick, and then it was selected to be tested for IAQ.
Engelenhoven, “Environmental Properties of Fly Ash Brick,” World of Coal Ash, USA, 2009
The results demonstrated that, in terms of physical and mechanical properties, CB Brick (2.5%) at 1°C/min improved the most and leached low heavy metals.
According to the previous results of physical and mechanical properties, TCLP was conducted because CB Brick contains high heavy metals compared to Clay Brick (0% CBs).
In this stage, by comparing with different percentages of CBs, CB Brick (2.5%) at 1°C/min yields the optimal performance in terms of physical and mechanical properties of manufactured brick, and then it was selected to be tested for IAQ.
Engelenhoven, “Environmental Properties of Fly Ash Brick,” World of Coal Ash, USA, 2009