Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: March 2009
Authors: G. Rodríguez-Castro, D. Meléndez-Morales, Jesus Vargas-Hernández, José Martínez-Trinidad, Ivan Campos-Silva, U. Figueroa-López
Effect of Boriding on the Mechanical Properties of AISI 1045 Steel
G.
Some mechanical properties of AISI 1045 borided steels were estimated in the present work.
Due to essential difference between mechanical and physical properties of coating and substrate, different methods are applied to study the effect of boriding on ferrous and non-ferrous alloys [4].
The mechanical tests were performed using cantilever type-rotary bending testing machine (RBF 200) under a frequency of 66 Hz, considering a stress concentration factor (Kt) of 2.53.
Conclusions The effect of boriding on the mechanical properties at the surface of AISI 1045 steels was evaluated in this work.
Some mechanical properties of AISI 1045 borided steels were estimated in the present work.
Due to essential difference between mechanical and physical properties of coating and substrate, different methods are applied to study the effect of boriding on ferrous and non-ferrous alloys [4].
The mechanical tests were performed using cantilever type-rotary bending testing machine (RBF 200) under a frequency of 66 Hz, considering a stress concentration factor (Kt) of 2.53.
Conclusions The effect of boriding on the mechanical properties at the surface of AISI 1045 steels was evaluated in this work.
Online since: August 2013
Authors: Dan Zhou, Yan Wang, Guang Fu Liu, Lei Zhang
Method for Mapping from Thermal Comfort Requirements to Energy Design Factors of Air-conditioning
Yan Wang 1, a, Guangfu Liu 1, b, Lei Zhang 1, c and Dan Zhou 1, d
1 School of Mechanical & Automotive Engineering, Hefei University of Technology, Hefei, Anhui, 230009, China
ahaorang730@163.com, bgfliu@hfut.edu.cn, cleonchao@163.com, dzhoudan80@126.com
Keywords: Thermal comfort requirement, Energy design factor, House of quality, Fuzzy mathematics
Abstract.
In order to satisfy human thermal comfort requirements (TCRS), meanwhile, optimize air-conditioning energy property in use stage as design objective, a model of mapping from TCRS to energy design factors (EDFs) of air-conditioning based on house of quality was presented.
However, for domestic air-condition, there is little research that involving air-conditioning itself performance and the design factors which influence thermal comfort.
The model of mapping from thermal comfort requirements to EDFs Energy Design Factors.
The influence factors of human thermal comfort conclude air temperature, air humidity, air velocity, mean radiant temperature as well as human clothing and activity.
In order to satisfy human thermal comfort requirements (TCRS), meanwhile, optimize air-conditioning energy property in use stage as design objective, a model of mapping from TCRS to energy design factors (EDFs) of air-conditioning based on house of quality was presented.
However, for domestic air-condition, there is little research that involving air-conditioning itself performance and the design factors which influence thermal comfort.
The model of mapping from thermal comfort requirements to EDFs Energy Design Factors.
The influence factors of human thermal comfort conclude air temperature, air humidity, air velocity, mean radiant temperature as well as human clothing and activity.
Online since: April 2018
Authors: Marian Králik, Vladimír Jerz
It analyzes residual stresses as one of the factors affecting the state of the surface layer after machining.
Changes in the surface layer affect fatigue properties of the workpiece, fracture propagation conditions and the like. [1, 2].
The applicability of the ultrasonic method is limited by the fact that the rate of acoustic wave propagation can be affected by a number of factors that may overlap with the residual stress effect.
Phase of change of mechanical properties.
The density and configuration of dislocations is changing (lattice disturbances), thus also the mechanical properties. 2.
Changes in the surface layer affect fatigue properties of the workpiece, fracture propagation conditions and the like. [1, 2].
The applicability of the ultrasonic method is limited by the fact that the rate of acoustic wave propagation can be affected by a number of factors that may overlap with the residual stress effect.
Phase of change of mechanical properties.
The density and configuration of dislocations is changing (lattice disturbances), thus also the mechanical properties. 2.
Online since: August 2019
Authors: Godavarthi Yeswanth Kiran Kumar, Sansanka Pentapalli, Venkata V. Subba Rao
Abstract: Composite materials are extensively used in various applications like space, aircraft, and automobile sector because of superior physical and mechanical properties even though they are costly.
Nano fillers can lead to increased fracture properties and the influence of the nano fibres has been extended to the reinforcing fibres by making more nano fibres to be involved during the delamination process[22].The addition of Nano Clay in to the epoxy is to get good mechanical properties for tensile, impact tests, fire retardancy improvement and also elongation for yield strength increment[23-28].
Traverse speed was found major factor affecting delamination factor.
Clay-Reinforced Epoxy Nanocomposites:Synthesis, Properties & Mechanism of Formation.
Faheem uddin Jawahar P, Balasubramanian M, Influence of nanosize clay platelets on the mechanical properties of glass fiber reinforced polyester composites.
Nano fillers can lead to increased fracture properties and the influence of the nano fibres has been extended to the reinforcing fibres by making more nano fibres to be involved during the delamination process[22].The addition of Nano Clay in to the epoxy is to get good mechanical properties for tensile, impact tests, fire retardancy improvement and also elongation for yield strength increment[23-28].
Traverse speed was found major factor affecting delamination factor.
Clay-Reinforced Epoxy Nanocomposites:Synthesis, Properties & Mechanism of Formation.
Faheem uddin Jawahar P, Balasubramanian M, Influence of nanosize clay platelets on the mechanical properties of glass fiber reinforced polyester composites.
Online since: October 2023
Authors: Sang You Kim, Yeong Jun Lee, Won Suk Jung, Hao Cheng, Taeuk Lim, Jie Hu
In this study, the mechanical properties of the bonding surface of the photocurable resin are used to grow cracks in the capsule so that the self-healing capsule pops out and the healing liquid inside the capsule can be diffused efficiently.
The study analyzed the concordance rate of the bonding surface of the capsule and the judging position, and analyzed the factors affecting the concordance rate.
Air bubbles affect the mechanical properties of the capsule[15-18].
When resin is used at room temperature in the resin-based capsule manufacturing process, microbubbles are generated, which may affect the mechanical properties of the capsule.
[11] Wang X, Sun P, Han N, Xing F, Experimental study on mechanical properties and porosity of organic microcapsules based self-healing cementitious composite, Materials, 10(2017)20
The study analyzed the concordance rate of the bonding surface of the capsule and the judging position, and analyzed the factors affecting the concordance rate.
Air bubbles affect the mechanical properties of the capsule[15-18].
When resin is used at room temperature in the resin-based capsule manufacturing process, microbubbles are generated, which may affect the mechanical properties of the capsule.
[11] Wang X, Sun P, Han N, Xing F, Experimental study on mechanical properties and porosity of organic microcapsules based self-healing cementitious composite, Materials, 10(2017)20
Online since: September 2013
Authors: Ya Xu, Wen Ting He, Zi Jian Wang, Yi Sheng Zhang
With the increasingly widespread application of high-strength steel(HSS), tailored properties, namely different mechanical properties required in different regions of the same part, have been proposed, in order to achieve the matching between mechanical properties and safety performance of motor vehicle parts.
However, with the more widespread application of high-strength steel, the matching between mechanical properties and safety performance of motor vehicle parts has been proposed, and to be more concrete, different mechanical properties are required in different regions of the same parts, namely tailored properties.
This work has discussed the influence of increasing gap on the mechanical properties of the parts experimentally.
The mold temperature determines the size of the thermal resistance between the blank and the mold, thus affecting the cooling rate of the blank.
Hence the blank of the transition region reached its lowest cooling rate considering the two factors, resulting the lowest hardness.
However, with the more widespread application of high-strength steel, the matching between mechanical properties and safety performance of motor vehicle parts has been proposed, and to be more concrete, different mechanical properties are required in different regions of the same parts, namely tailored properties.
This work has discussed the influence of increasing gap on the mechanical properties of the parts experimentally.
The mold temperature determines the size of the thermal resistance between the blank and the mold, thus affecting the cooling rate of the blank.
Hence the blank of the transition region reached its lowest cooling rate considering the two factors, resulting the lowest hardness.
Online since: October 2015
Authors: Foad Mohamed Elkut, Meor Othman Hamzah
The rheological properties of mastic in terms of penetration, softening point, rotational viscosity and Superpave rutting factor using 60/70 asphalt binder blended with 5, 10, 15, 20 % of CaCO3+TPOFA were calculated to evaluate asphalt binder properties subjected to different aging conditions.
Superpave rutting and fatigue factors were calculated to determine the basic characteristics and rheological properties of the asphalt mastic and unmodified binder subjected to different aging conditions using the DSR.
The statistical analysis results in Table 5 shows that between 52°C to 82°C, increasing CaCo3+TPOFA content significantly affect the rutting factor for unaged samples.
Effects of fillers on properties of asphalt-concrete mixture.
Mechanical Properties of Filler-Asphalt Mastics.
Superpave rutting and fatigue factors were calculated to determine the basic characteristics and rheological properties of the asphalt mastic and unmodified binder subjected to different aging conditions using the DSR.
The statistical analysis results in Table 5 shows that between 52°C to 82°C, increasing CaCo3+TPOFA content significantly affect the rutting factor for unaged samples.
Effects of fillers on properties of asphalt-concrete mixture.
Mechanical Properties of Filler-Asphalt Mastics.
Online since: September 2019
Authors: Surapich Loykulnant, Chaveewan Kongkaew, Paweena Prapainainar, Peerapan Dittanet, Thidarat Petchsoongsakul
The optimum filler content was affected to mechanicals properties of natural rubber composites.
Size of filler is one of factors to affect the interfacial interaction between filler and polymer. and the dispersion of filler in polymer matrix [8].
Mechanical Properties.
Natural rubber composites improved mechanical properties.
In addition, this biocomposite was improved in mechanical properties.
Size of filler is one of factors to affect the interfacial interaction between filler and polymer. and the dispersion of filler in polymer matrix [8].
Mechanical Properties.
Natural rubber composites improved mechanical properties.
In addition, this biocomposite was improved in mechanical properties.
Online since: August 2018
Authors: Boray Yildirim, Mehmet Ali Güler, K.B. Yilmaz
For this reason, there are many studies in the open literature regarding crack mechanisms in homogeneous or functionally graded materials (FGMs) involving isotropic or anisotropic material properties.
By using the stiffness parameters from Krenk [4], the dependency of the stress intensity factors on the material properties was investigated.
The novelty of this study comes from introducing the orthotropic material properties and surface crack conditions to the finite element method.
It is noted that, the change on the normalized depth of the crack, , greatly affects the mixed-mode stress intensity factors, and .
The change on the normalized depth of the crack, , greatly affects the mixed-mode stress intensity factors, and .
By using the stiffness parameters from Krenk [4], the dependency of the stress intensity factors on the material properties was investigated.
The novelty of this study comes from introducing the orthotropic material properties and surface crack conditions to the finite element method.
It is noted that, the change on the normalized depth of the crack, , greatly affects the mixed-mode stress intensity factors, and .
The change on the normalized depth of the crack, , greatly affects the mixed-mode stress intensity factors, and .
Online since: May 2020
Authors: Miroslav Manas, Martin Ovsik, Pavel Stoklásek, Aleš Mizera
Masaryka 5555, 760 01, Zlin, Czech Republic
a*pstoklasek@utb.cz, bmizera@utb.cz, cmanas@utb.cz, dovsik@utb.cz
Keywords: nanohardness, depth sensing indentation, mechanical properties, laser cutting, plasma cutting, wire electrical discharge machining, waterjet cutting, heat-affected zone
Abstract.
These limiting factors have led to the development of so-called unconventional methods suitable for machining and cutting materials.
The term HAZ is also widely used in the welding, where it defines an area close to the weld with other chemical and mechanical properties than the weld material and the base material. [3-7] The heat-affected area usually consists of multiple bands.
However, it was first necessary to create a cut on the test specimens that would enable measurement of the mechanical properties of the HAZ and metallographic analysis.
Areas with this type of damage have deteriorated mechanical properties and lower corrosion resistance.
These limiting factors have led to the development of so-called unconventional methods suitable for machining and cutting materials.
The term HAZ is also widely used in the welding, where it defines an area close to the weld with other chemical and mechanical properties than the weld material and the base material. [3-7] The heat-affected area usually consists of multiple bands.
However, it was first necessary to create a cut on the test specimens that would enable measurement of the mechanical properties of the HAZ and metallographic analysis.
Areas with this type of damage have deteriorated mechanical properties and lower corrosion resistance.