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Online since: January 2010
Authors: Yoshihiko Uematsu, Keiro Tokaji
Thus FSP is believed to be one of the most useful methods for
improving mechanical properties, particularly fatigue properties.
Experimental results A356-T6 Microstructure and mechanical properties.
The mechanical properties of the as-cast FSPed specimens are listed in Table 1.
AZ91-T5 Microstructure and mechanical properties.
The mechanical properties of the as-cast and FSPed specimens are listed in Table 1.
Experimental results A356-T6 Microstructure and mechanical properties.
The mechanical properties of the as-cast FSPed specimens are listed in Table 1.
AZ91-T5 Microstructure and mechanical properties.
The mechanical properties of the as-cast and FSPed specimens are listed in Table 1.
Online since: April 2015
Authors: Jin Hua Shi
Design Consideration
This Section details main factors considered in this paper.
3.1.
In general, welding may adversely affect the material properties and creation of stress concentrations by physical defects.
Sections at Header Weld From the assessment, adequate reserve factors against primary stress requirements of ASME III NH have been demonstrated.
With reference to Figs 16-19, seven bounding assessment locations are presented as follows: (i) Bounding position in the bend – Location B2, with 316L parent material properties; (ii) Bounding position in the header – Location H2, with 316L parent material properties; (iii) Bounding position in the guide tube – Location T2, with both 316L parent and 316 weld properties; (iv) Bounding position in the guide tube weld – Location T3, with 316 weld properties; (v) Bounding position in the tubeplate weld – Location TP1, with both 316H parent and 316 weld properties; (vi) Bounding position in the tubeplate weld – Location TP2, with 316 weld properties; (vii) Bounding position in the header weld – Location W3, with both 316L and 316 weld properties.
Since these damage factors are less than unity, there is no need to postulate the formation of a defect. 9.
In general, welding may adversely affect the material properties and creation of stress concentrations by physical defects.
Sections at Header Weld From the assessment, adequate reserve factors against primary stress requirements of ASME III NH have been demonstrated.
With reference to Figs 16-19, seven bounding assessment locations are presented as follows: (i) Bounding position in the bend – Location B2, with 316L parent material properties; (ii) Bounding position in the header – Location H2, with 316L parent material properties; (iii) Bounding position in the guide tube – Location T2, with both 316L parent and 316 weld properties; (iv) Bounding position in the guide tube weld – Location T3, with 316 weld properties; (v) Bounding position in the tubeplate weld – Location TP1, with both 316H parent and 316 weld properties; (vi) Bounding position in the tubeplate weld – Location TP2, with 316 weld properties; (vii) Bounding position in the header weld – Location W3, with both 316L and 316 weld properties.
Since these damage factors are less than unity, there is no need to postulate the formation of a defect. 9.
Online since: March 2008
Authors: Indera Sadikin, Djoko Suharto, Bangkit Meliana, Kemal Supelli, Abdul Arya
In Probabilistic
Fracture Mechanics Analysis, three types of shaping factors are considered.
The primary shaping factors are crack growth coefficient and fracture toughness.
Both are stochastic inputs derived from fracture mechanics properties of material.
The secondary shaping factors are the cyclic pressure and its resulting stress.
[5] Legowo, D.: FEM Technique for Calculating Stress Intensity Factors (in Indonesian), Master Thesis, Mechanical Engineering Department, Institut Teknologi Bandung (1999)
The primary shaping factors are crack growth coefficient and fracture toughness.
Both are stochastic inputs derived from fracture mechanics properties of material.
The secondary shaping factors are the cyclic pressure and its resulting stress.
[5] Legowo, D.: FEM Technique for Calculating Stress Intensity Factors (in Indonesian), Master Thesis, Mechanical Engineering Department, Institut Teknologi Bandung (1999)
Online since: June 2015
Authors: Udayan De, Kriti Ranjan Sahu, Abhijit De
Same factors led to development of quartz crystal oscillator for mass and time measurements.
The mechanical quality factors were at room temperature, closely related to various vibration modes, the values reported for ReCOB crystals are the thickness shear mode. 6.4.
Factors like this and pulse width determine the range and resolution of imaging possible with pulsed ultrasonic.
Their advantages over ferroelectric materials lie in much lower aging and high mechanical quality factors, due to the absence of ferroelectric domains.
ZnO and AIN are non-ferroelectric piezoelectric crystals with a wurtzite type (ZnS) structure [47], and high mechanical quality factors, due to the absence of ferroelectric domains.
The mechanical quality factors were at room temperature, closely related to various vibration modes, the values reported for ReCOB crystals are the thickness shear mode. 6.4.
Factors like this and pulse width determine the range and resolution of imaging possible with pulsed ultrasonic.
Their advantages over ferroelectric materials lie in much lower aging and high mechanical quality factors, due to the absence of ferroelectric domains.
ZnO and AIN are non-ferroelectric piezoelectric crystals with a wurtzite type (ZnS) structure [47], and high mechanical quality factors, due to the absence of ferroelectric domains.
Online since: October 2006
Authors: Gye Chun Cho, Jong Sub Lee, Eun Soo Hong
Introduction
The porosity or void ratio is directly related to fundamental mechanical properties of particulate
materials such as dilatancy, shear strength and compressibility.
The technique involves a needle-size probe that is pushed into the soil to permit one to measure the local electromagnetic properties of the medium along its path.
The measured impedance Z * meas is affected by the impedance of the probe, the cable, electrode polarization, and the soil itself.
(3) where factors α and β are electrode shape factors for resistance and capacitance determined by calibrating with known fluids, and ε0 is the permittivity of vacuum.
The resistance shape factor is α = 2.15 cm-1 for the large probe and α = 6.7 cm-1 for the small probe.
The technique involves a needle-size probe that is pushed into the soil to permit one to measure the local electromagnetic properties of the medium along its path.
The measured impedance Z * meas is affected by the impedance of the probe, the cable, electrode polarization, and the soil itself.
(3) where factors α and β are electrode shape factors for resistance and capacitance determined by calibrating with known fluids, and ε0 is the permittivity of vacuum.
The resistance shape factor is α = 2.15 cm-1 for the large probe and α = 6.7 cm-1 for the small probe.
Online since: January 2013
Authors: Jian Hui Qiu, Ying Zhao, Ming Ming Shang, Dan He, Min Zhang
In recent years, the modification of PBS has become a hot spot, for modified PBS can not only maintain good mechanical properties and thermal properties, but also can improve its biocompatibility and biodegradability.
Such as PBS, the mechanism of polyester degradation is complicated, because the biodegradation of polyester is affected by a variety of factors, such as its structure and the external environment.
To examine the changes of P(BS-co-DGS) thermal properties before and after degradation, the thermal decomposition temperatures of copolyesters were measured by TGA (shown in Table 2).
Ge, et al., Study on Synthesis and Properties of PBS-based Terpolymers.
Dang, et al., Enzymatic Biodegradation and Thermal Properties of Phosphorylcholine Functionalized Poly (butylene succinate).
Such as PBS, the mechanism of polyester degradation is complicated, because the biodegradation of polyester is affected by a variety of factors, such as its structure and the external environment.
To examine the changes of P(BS-co-DGS) thermal properties before and after degradation, the thermal decomposition temperatures of copolyesters were measured by TGA (shown in Table 2).
Ge, et al., Study on Synthesis and Properties of PBS-based Terpolymers.
Dang, et al., Enzymatic Biodegradation and Thermal Properties of Phosphorylcholine Functionalized Poly (butylene succinate).
Online since: July 2020
Authors: Dalya H. Hameed, Abeer Abduljabbar Al-Saeedi
Fiber reinforced self-consolidation concrete (FSCC) contains two type or more of fiber can improve the mechanical properties and may cause performance synergies.
The properties of each are represented in Table 4.
Results and Discussions Fresh Properties.
Santhanam, Mechanical properties of high strength concrete reinforced with metallic and non-metallic fibers, Cem.
Nematzadeh, The effect of forta-ferro and steel fibers on mechanical properties of high-strength concrete with and without silica fume and nano-silica, Constr.
The properties of each are represented in Table 4.
Results and Discussions Fresh Properties.
Santhanam, Mechanical properties of high strength concrete reinforced with metallic and non-metallic fibers, Cem.
Nematzadeh, The effect of forta-ferro and steel fibers on mechanical properties of high-strength concrete with and without silica fume and nano-silica, Constr.
Online since: September 2016
Authors: Yulia Sidorenko, Sofia F. Korenkova
The nano-sized filler has a polyfunctional influence on the structure and properties of calcium-silicate and cement materials, takes part in the formation of new chemical compounds and the structure of pore walls.
Models of synergetic belong to the nonlinear nonequilibrium systems which are affected by fluctuations.
Disclosure of the phenomenon of self-organization, essence of nonlinear development of system, a role of separate physical, chemical, mechanical factors in formation of structure and properties of materials, etc. is possible.
Each level differs in the nature of self-organization that defines creation of materials with the set properties.
The novelty of the suggested solutions lies in the representation of contact formation zone as a multilayer system with different rheological properties.
Models of synergetic belong to the nonlinear nonequilibrium systems which are affected by fluctuations.
Disclosure of the phenomenon of self-organization, essence of nonlinear development of system, a role of separate physical, chemical, mechanical factors in formation of structure and properties of materials, etc. is possible.
Each level differs in the nature of self-organization that defines creation of materials with the set properties.
The novelty of the suggested solutions lies in the representation of contact formation zone as a multilayer system with different rheological properties.
Online since: September 2016
Authors: Matteo Colombo, Thomaz E.T. Buttignol, Marco di Prisco
SFRC properties
The SFRC concrete mix design is shown in Table 1.
Concrete mechanical properties at 28 days were obtained from [11], assuming that concrete residual strength is equal to the one at hot condition.
In general, a better prediction was achieved with the introduction of the reduction factor.
[11] Hager, I., Thermal behavior of high performance concretes at high temperature - evolution of mechanical properties, (PhD Thesis) l’Ecole Nationale des Ponts et Chaussées, 2005
[13] Colombo, M.; di Prisco, M. and Felicetti, R.: Mechanical properties of steel fibre reinforced concrete exposed at high temperatures.
Concrete mechanical properties at 28 days were obtained from [11], assuming that concrete residual strength is equal to the one at hot condition.
In general, a better prediction was achieved with the introduction of the reduction factor.
[11] Hager, I., Thermal behavior of high performance concretes at high temperature - evolution of mechanical properties, (PhD Thesis) l’Ecole Nationale des Ponts et Chaussées, 2005
[13] Colombo, M.; di Prisco, M. and Felicetti, R.: Mechanical properties of steel fibre reinforced concrete exposed at high temperatures.
Online since: November 2010
Authors: Yu Sheng Shi, Guo Cheng Liu, Qing Song Wei, Ji Wei Wang
The
thermo-mechanical coupling analysis was carried out by the finite element code MSC.Marc.
The applied pressure as one of the most important factors can significantly affect densification behavior, mechanical property of compacts during HIP process.
Through thermo-mechanical coupling calculations, density distribution and density history for the compact with different applied pressures during HIP process were discussed.
The applied pressure as one of the most important factors can significantly affect densification behavior, mechanical property of compacts during HIP process.
Through thermo-mechanical coupling calculations, density distribution and density history for the compact with different applied pressures during HIP process were discussed.