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Online since: June 2005
Authors: Xiu Qun Li, Zhi Ming Yang, Ting Wu Qin, Kailu Liang, Hui Qi Xie
Actually, mechanical stress is an important stimulation factor from
outside, which influence growth and function of fibroblasts [1].
The mechanical properties of tendon mainly base on the tissue-specific three-dimensional structure, while the organization of three-dimensional structure that possesses specific shape and function, benefits from the extrinsic mechanical strain.
Two scaffolds were fastened to one holder of the culture flask, and one of them was affected by strain, while the other moved periodically without strain.
It is conceivable that the surface properties and pore structure of the scaffolds influenced the adhesion properties of tenocytes[5] and eventually also influence the morphological change of cells Cell Proliferation and DNA Synthesis.
Triantafillopoulos et al[6] discovered load acted synergistically to increase matrix remodeling and biomechanical properties of bioartificial tendons..
The mechanical properties of tendon mainly base on the tissue-specific three-dimensional structure, while the organization of three-dimensional structure that possesses specific shape and function, benefits from the extrinsic mechanical strain.
Two scaffolds were fastened to one holder of the culture flask, and one of them was affected by strain, while the other moved periodically without strain.
It is conceivable that the surface properties and pore structure of the scaffolds influenced the adhesion properties of tenocytes[5] and eventually also influence the morphological change of cells Cell Proliferation and DNA Synthesis.
Triantafillopoulos et al[6] discovered load acted synergistically to increase matrix remodeling and biomechanical properties of bioartificial tendons..
Online since: February 2008
Authors: Ying Qiang Xu, Xi Ya Gao, Yu An Yuan, Zhen Long Wang, Ren Zhou, Guo Zhi Lv
The influences of material properties and interfacial morphology on the variation
of residual stress during thermal cycling are considered and discussed.
We assume the body is made of an elastic/perfectly plastic material where: p ij e ijij εεε &&& += (1) The elastic strains el ijε are given by: klijkl e ij C σε = (2) where the tensor Cijkl satisfies the usual symmetry properties.
Summary of material properties K (w/mm°C) ρ (kg/mm3) µ c (J/Kg°C) TBC 0.0015 5.6 × 10-6 0.1 405 BC 0.0236 7.8 × 10-6 0.3 398 Shakedown theorem.
Model Definition and Calculation Results In order to obtain the influences of material properties on the variation of residual stress, the model is depicted in Fig.1.
Other factors that appear to be centrally related to the residual stress and stability, such as thermal expansion misfit between the bond coat and the substrate, as well as the temperature dependence of yielding will be addressed in a subsequent study.
We assume the body is made of an elastic/perfectly plastic material where: p ij e ijij εεε &&& += (1) The elastic strains el ijε are given by: klijkl e ij C σε = (2) where the tensor Cijkl satisfies the usual symmetry properties.
Summary of material properties K (w/mm°C) ρ (kg/mm3) µ c (J/Kg°C) TBC 0.0015 5.6 × 10-6 0.1 405 BC 0.0236 7.8 × 10-6 0.3 398 Shakedown theorem.
Model Definition and Calculation Results In order to obtain the influences of material properties on the variation of residual stress, the model is depicted in Fig.1.
Other factors that appear to be centrally related to the residual stress and stability, such as thermal expansion misfit between the bond coat and the substrate, as well as the temperature dependence of yielding will be addressed in a subsequent study.
Online since: April 2023
Authors: Samriti Khosla, Santosh Mani, Pradip Sarawade
It also changes the phase behavior of the LC mixture affecting the overall performance of LC-QD composite systems.
The formation of LC mixtures depends on two factors: First, the ability of the molecules to mix together, and second, the mean orientation cohesive energy density of the mixture.
The properties of QDs are size-dependent; therefore, they are extensively used to modify the properties of LCs to fine-tune and improve the electro-optical and photonics-based properties.
Here we summarize the various outcomes that may be useful for Photonics and Electro-optical applications: (a) We could successfully achieve the homogeneous dispersion of QDs without affecting the mechanical stability of the LC mixture system.
"Physical properties of liquid crystals doped with CsPbBr3 quantum dots."
The formation of LC mixtures depends on two factors: First, the ability of the molecules to mix together, and second, the mean orientation cohesive energy density of the mixture.
The properties of QDs are size-dependent; therefore, they are extensively used to modify the properties of LCs to fine-tune and improve the electro-optical and photonics-based properties.
Here we summarize the various outcomes that may be useful for Photonics and Electro-optical applications: (a) We could successfully achieve the homogeneous dispersion of QDs without affecting the mechanical stability of the LC mixture system.
"Physical properties of liquid crystals doped with CsPbBr3 quantum dots."
Online since: June 2014
Authors: Sri Jayanti Dewi, Abdul Hassan Norhidayah, Mohd Rosli Hainin, Putra Jaya Ramadhansyah, Mohd Haziman Wan Ibrahim, A. Aziz Md. Maniruzzaman
Effect of Rice Husk Ash Fineness on the Properties of Concrete
Dewi Sri Jayanti1,a, Ramadhansyah Putra Jaya2,b*,
Norhidayah Abdul Hassan3,c, Md.
In the present research, the effect of rice husk ash fineness on the properties of concrete was studied.
Workability, compressive strength and gas permeability tests were carried out to identify the properties of concrete.
Previous studies showed that grinding of pozzolanic material, such as POFA, FA and RHA, into a high degree of fineness is the major factor affecting compressive strength of cement concrete [3].
The objective of the present investigation is to evaluate the influence of RHA fineness on the properties of hardened concretes.
In the present research, the effect of rice husk ash fineness on the properties of concrete was studied.
Workability, compressive strength and gas permeability tests were carried out to identify the properties of concrete.
Previous studies showed that grinding of pozzolanic material, such as POFA, FA and RHA, into a high degree of fineness is the major factor affecting compressive strength of cement concrete [3].
The objective of the present investigation is to evaluate the influence of RHA fineness on the properties of hardened concretes.
Online since: September 2016
Authors: Ivo Černý, Jiří Sís
The technology is quite new and so, investigations have to be performed in order to gain a comprehensive knowledge about effects on numerous material and technological parameters on weld quality and properties.
The steel is of a low-carbon type and have been designed to provide better mechanical properties.
This work was aimed at an evaluation of characteristics of laser welded S355 steel sheets of the thickness 6 mm and 10 mm, respectively, with a particular emphasis on fatigue resistance of specimens with smooth surface and evaluation of damage mechanisms and affecting factors.
Fig. 6: Surface transversal residual stresses across the welds of sheets There are some other factors which may affect the fatigue resistance characteristics like e.g. different notch toughness, but the most important probably are residual stresses, evaluated by X-ray diffraction at the Czech Technical University in Prague – Fig. 6.
Conclusions Very different and self- contradictory results of the investigation of fatigue resistance of laser welded sheets of 6 mm and 10 mm thickness, respectively were found and some possible affecting factors like local microstructure, chemical composition, local hardness and residual stresses were addressed.
The steel is of a low-carbon type and have been designed to provide better mechanical properties.
This work was aimed at an evaluation of characteristics of laser welded S355 steel sheets of the thickness 6 mm and 10 mm, respectively, with a particular emphasis on fatigue resistance of specimens with smooth surface and evaluation of damage mechanisms and affecting factors.
Fig. 6: Surface transversal residual stresses across the welds of sheets There are some other factors which may affect the fatigue resistance characteristics like e.g. different notch toughness, but the most important probably are residual stresses, evaluated by X-ray diffraction at the Czech Technical University in Prague – Fig. 6.
Conclusions Very different and self- contradictory results of the investigation of fatigue resistance of laser welded sheets of 6 mm and 10 mm thickness, respectively were found and some possible affecting factors like local microstructure, chemical composition, local hardness and residual stresses were addressed.
Online since: August 2020
Authors: Vladimir A. Belyakov, Fedor L. Kapustin
Physical and mechanical characteristics of possible aggregates of local production for this type of concrete affecting its operational properties are considered.
Currently, in the laboratory of the Department Materials Science in Construction conducted research of physical and mechanical properties of concrete mixtures based on peat and polystyrene foam and testing of their technological parameters.
Belyakov Physico-mechanical and thermal insulation properties of lightweight concrete based on modified peat for wall structures, Construction and education, 14 (2011) 52-56
Properties and use of coal fly ash a valuable industrial by-product.
Arakelyan, Strength and deformative properties of light concrete depending on the properties of aggregates Moscow, (1986), 24.
Currently, in the laboratory of the Department Materials Science in Construction conducted research of physical and mechanical properties of concrete mixtures based on peat and polystyrene foam and testing of their technological parameters.
Belyakov Physico-mechanical and thermal insulation properties of lightweight concrete based on modified peat for wall structures, Construction and education, 14 (2011) 52-56
Properties and use of coal fly ash a valuable industrial by-product.
Arakelyan, Strength and deformative properties of light concrete depending on the properties of aggregates Moscow, (1986), 24.
Online since: February 2011
Authors: Ziad K. Awad, Talal F. Yusaf
The material response was considered as thermal expansion, cracking, crushing, yielding and changing of material properties with the temperature increase.
The FE element was modified to allow temperature distribution and material properties changing to throw thickness of the concrete beam.
Abbasi and Hogg [7] proposed a semi-empirical model of properties and thermal distribution prediction through fibre reinforced concrete beam.
In addition, changing of the mechanical properties of the materials is considered as a consequence of temperature rising.
The materials mechanical properties are shown in Table 1.
The FE element was modified to allow temperature distribution and material properties changing to throw thickness of the concrete beam.
Abbasi and Hogg [7] proposed a semi-empirical model of properties and thermal distribution prediction through fibre reinforced concrete beam.
In addition, changing of the mechanical properties of the materials is considered as a consequence of temperature rising.
The materials mechanical properties are shown in Table 1.
Online since: February 2021
Authors: Mukhlis M. Ismail, Wafaa A. Hussain, Entessar H.A. Al-Mosawe, Luay H. Alwan
Degradation, bioactivity and mechanical properties of BCP implant is controlled by variation HA/TCP ratio [12].
Physical and mechanical properties were studied, and samples were characterized by XRD, FTIR and SEM.
Tablet samples, with approximate dimensions of 25 mm diameter and 5 mm thickness were prepared for physical and mechanical properties.
Table 3: The results of physical and mechanical properties.
Rafiq, Mechanical properties of carrot fiber- epoxy composite, J.
Physical and mechanical properties were studied, and samples were characterized by XRD, FTIR and SEM.
Tablet samples, with approximate dimensions of 25 mm diameter and 5 mm thickness were prepared for physical and mechanical properties.
Table 3: The results of physical and mechanical properties.
Rafiq, Mechanical properties of carrot fiber- epoxy composite, J.
Online since: July 2020
Authors: Awad A. Al-Rashdi, Sam Sung Ting, Abdulkader M. Alakrach, Nik Noriman Zulkepli, Omar S. Dahham, Rosniza Hamzah
They also displayed better mechanical, barrier, morphological and structural properties when the researchers analysed the impact of the electron beam irradiation on the nanomaterials.
For instance, a reinforcement of the pristine PLA material with the nanoparticles could significantly improve the mechanical and barrier properties of the material [7].
It was also noted that the PLA properties were affected by the clay addition and an ebeam irradiation treatment.
Domenek, Influence of chemical surface modification of cellulose nanowhiskers on thermal, mechanical, and barrier properties of poly (lactide) based bionanocomposites.
Rhim, Effect of clay contents on mechanical and water vapor barrier properties of agar-based nanocomposite films.
For instance, a reinforcement of the pristine PLA material with the nanoparticles could significantly improve the mechanical and barrier properties of the material [7].
It was also noted that the PLA properties were affected by the clay addition and an ebeam irradiation treatment.
Domenek, Influence of chemical surface modification of cellulose nanowhiskers on thermal, mechanical, and barrier properties of poly (lactide) based bionanocomposites.
Rhim, Effect of clay contents on mechanical and water vapor barrier properties of agar-based nanocomposite films.
Online since: April 2008
Authors: Jue Zhong, Shi Cheng Hu, Wei Ce Ma, Xiao Qian Li
These
thermal and mechanical systems of equations are solved
simultaneously using the Newton's method.
2.2 Thermal model
Due to the time-dependent nature of the casting
process, the heat transfer model of the DC casting
process must be transient and must account for any
appreciable temperature dependencies in
thermo-physical properties of the materials employed in
the casting process.
The heat transfer coefficient depends on many factor such as the water flow rate, the spraying position, the nozzle type, the surface temperature of the ingot, and so on.
The thermophysical properties of 7B50 aluminum in the analysis are temperature dependent.
Fig.3 The temperature of the nodes at the center and surface of the ingot along the casting( v=24 mm/min) The principle stress along the casting direction is one of the major factors to produce hot cracking in the semi-casting process.
At the same time, the temperature is another important factor to affect the principle stress, because the stress is depend on the elastic modulus which is temperature dependent.
The heat transfer coefficient depends on many factor such as the water flow rate, the spraying position, the nozzle type, the surface temperature of the ingot, and so on.
The thermophysical properties of 7B50 aluminum in the analysis are temperature dependent.
Fig.3 The temperature of the nodes at the center and surface of the ingot along the casting( v=24 mm/min) The principle stress along the casting direction is one of the major factors to produce hot cracking in the semi-casting process.
At the same time, the temperature is another important factor to affect the principle stress, because the stress is depend on the elastic modulus which is temperature dependent.