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Online since: September 2014
Authors: Elio Sacco, Ernesto Grande, Maura Imbimbo
Properties of clay bricks.
Both types are bi-component epoxy resin but they are characterized by different mixing ratios, mechanical properties (tensile strength and elastic modulus) and, in particular, by different values of the density: 1,08±0,05kg/l for FIDSATURANT HM and 1,65±0,05kg/l for FIDPUTTY.
FIDPUTTY presents a consistence similar to the cementitious grout but with much better mechanical properties.
In particular, as already discussed in the previous sections, the characteristics of the adhesive, together with some properties of the support (porosity, roughness, etc.), affect the strengthening/support interface layer.
First, it has been observed that in the case of SRPs with medium density adhesives, as well as SRGs, differently from SRPs with low density adhesives, the bond resistance is not significantly influenced by the mechanical properties of the support.
Both types are bi-component epoxy resin but they are characterized by different mixing ratios, mechanical properties (tensile strength and elastic modulus) and, in particular, by different values of the density: 1,08±0,05kg/l for FIDSATURANT HM and 1,65±0,05kg/l for FIDPUTTY.
FIDPUTTY presents a consistence similar to the cementitious grout but with much better mechanical properties.
In particular, as already discussed in the previous sections, the characteristics of the adhesive, together with some properties of the support (porosity, roughness, etc.), affect the strengthening/support interface layer.
First, it has been observed that in the case of SRPs with medium density adhesives, as well as SRGs, differently from SRPs with low density adhesives, the bond resistance is not significantly influenced by the mechanical properties of the support.
Online since: January 2012
Authors: Hisaki Watari, Kazuya Akitsu, Shinji Kumai, Toshio Haga
The roll speed is most important factor in the roll cater.
The mechanical property of the strip with smooth scribed surface became better.
Mechanical property of the strip cast using the single roll caster equipped with the scraper was almost as same as that of strip cast by D.C. casting.
Summary Properties of a single roll caster equipped with a scraper were shown in this paper.
Properties of the AA5182 strip by a single roll caster equipped with a scraper were almost as same as these of the strip made by D,C. casting.
The mechanical property of the strip with smooth scribed surface became better.
Mechanical property of the strip cast using the single roll caster equipped with the scraper was almost as same as that of strip cast by D.C. casting.
Summary Properties of a single roll caster equipped with a scraper were shown in this paper.
Properties of the AA5182 strip by a single roll caster equipped with a scraper were almost as same as these of the strip made by D,C. casting.
Online since: March 2025
Authors: Gaurav Kumar, Sudarsan Ghosh, Paruchuri Venkateswara Rao
Due to the exceptional properties of these superalloys their machining becomes very difficult and time-consuming; They damage the cutting tool, and excessive use of lubricants eventually affect the material handling and cost.
Introduction Nimonic and other nickel-based alloys are promising materials for use in nuclear and gas power plants for turbine components due to their exceptional mechanical and thermal properties [1].
The advanced properties of these Nickel-based superalloys make them very difficult to machine, and therefore, their machining costs are sometimes unbearable [2].
The solid lubrication technique effectively increases the machinability of the Nimonic 90 superalloy; however, future work needs to be done in this domain such that the lubricative material, method, and economic factors are equally considered.
Wood, “Tribological performance of surface texturing in mechanical applications—a review,” Surf Topogr, vol. 8, no. 4, p. 043001, Dec. 2020
Introduction Nimonic and other nickel-based alloys are promising materials for use in nuclear and gas power plants for turbine components due to their exceptional mechanical and thermal properties [1].
The advanced properties of these Nickel-based superalloys make them very difficult to machine, and therefore, their machining costs are sometimes unbearable [2].
The solid lubrication technique effectively increases the machinability of the Nimonic 90 superalloy; however, future work needs to be done in this domain such that the lubricative material, method, and economic factors are equally considered.
Wood, “Tribological performance of surface texturing in mechanical applications—a review,” Surf Topogr, vol. 8, no. 4, p. 043001, Dec. 2020
Online since: November 2013
Authors: Che Hassan Che Haron, Jaharah Abd Ghani, Mohd Amri Sulaiman, Juri Saedon, Mohd Shahir Kasim
Inconel 718 has found its niche in many industries [1], due to its unique properties; Ni and Cr provide such as oxidation, carburizing and corrosion resistance that able to retain mechanical strength, even at elevated temperatures [2, 3].
Good mechanical properties together with work hardening lead to increased cutting force causing many problems leading to early tool failure [6].
Results and discussion Throughout this study, a radial DOC was the most significant factor besides cutting speed and feed rate.
However, cutting speed predominantly affects tool wear among the samples within the groups.
This speed variation affects chip flow heat generation which influences the nature of tool wear on the cutting edge.
Good mechanical properties together with work hardening lead to increased cutting force causing many problems leading to early tool failure [6].
Results and discussion Throughout this study, a radial DOC was the most significant factor besides cutting speed and feed rate.
However, cutting speed predominantly affects tool wear among the samples within the groups.
This speed variation affects chip flow heat generation which influences the nature of tool wear on the cutting edge.
Online since: January 2013
Authors: Kai Liu
Surface modification means by fixing some cytokines on the surface or changing the surface local feature to improving the biocompatibility of the material or surface properties, so as to achieve a desired cell adhesion and growth effect.
The bone damage in sport seriously affects the sports participants’ movement technical level or improved quality of life.
Especially the gel network system in water and their different status, material composition, surface energy, surface charge state, topology structure and the surface of the biological specificity of recognition etc. factors are independent of each other, and interact with each other, which constituting its complexity.
Table 1 Mechanical property of composite materials Test item Numerical value Flexural strength 81MPa Compressive strength 103MPa Elongation at break 1% Modulus of elasticity 7.6GPa Good material-cell function interface is a cell adhesion, proliferation, and by activating cell specific gene expression, the maintenance of normal cellular phenotype and cell differentiation.
The use of growth factors and hormones may regulate cell growth and phenotypic expression of the principle of drug controlled release technique is introduced into the tissue engineering, can no longer be considered biocompatible, residue and matrix material selection and fabrication process of the problems, to minimize treatment of pain.In drug control matrix material supported various growth factors or hormones, to the seed cell quantitative, sustained release, in favor of cell growth and differentiation, is an ideal means of bone injury rehabilitation, current research is not yet ripe.
The bone damage in sport seriously affects the sports participants’ movement technical level or improved quality of life.
Especially the gel network system in water and their different status, material composition, surface energy, surface charge state, topology structure and the surface of the biological specificity of recognition etc. factors are independent of each other, and interact with each other, which constituting its complexity.
Table 1 Mechanical property of composite materials Test item Numerical value Flexural strength 81MPa Compressive strength 103MPa Elongation at break 1% Modulus of elasticity 7.6GPa Good material-cell function interface is a cell adhesion, proliferation, and by activating cell specific gene expression, the maintenance of normal cellular phenotype and cell differentiation.
The use of growth factors and hormones may regulate cell growth and phenotypic expression of the principle of drug controlled release technique is introduced into the tissue engineering, can no longer be considered biocompatible, residue and matrix material selection and fabrication process of the problems, to minimize treatment of pain.In drug control matrix material supported various growth factors or hormones, to the seed cell quantitative, sustained release, in favor of cell growth and differentiation, is an ideal means of bone injury rehabilitation, current research is not yet ripe.
Online since: November 2012
Authors: Qing Chun Hu, Ke Song, Xiao Ping Jiang
Research of Fatigue Stress Cracking for Injection Mold Cavity
Based on Ansys Workbench
Qingchun Hu1,a , Ke Song 1, b, and Xiaoping Jiang 2,c
1 School of Mechanical and Automotive Eng, South China University of Tech, Guangzhou
2 Guangdong Xing Lian Precise Machinery Co, Foshan
a huqc@scut.edu.cn, bziteng.006@163.com, c xpjiang@gdxl.com
Keywords: Fatigue Stress Cracking; Thermal Stress Field; Fatigue Life; Injection Mold
Abstract.
Injection side withstands the clamping force from mold clamping to mold opening and inner cavity withstands injection pressure, while the melt temperature affects the mold temperature distribution.
Solid works can import the model data to AWB in a high success rate [5].Auto mesh the model in AWB, set the unit type and define the material properties.
Set fatigue tool>Materials>Fatigue Strength Factor as 0.8; Loading>type>Zero-Based and Scale Factor as 1; Options>Mean Stress Theory>Soderberg.
Therefore, some suggestions for improving the fatigue life of the cavity are as follows, (1) Optimize the cooling tank fillet to reduce stress concentration and fillet mutation[7].(2) Improve the strength and stiffness as much as possible to increase the wall thickness of the cavity and reduce the maximum stress, at the same time take consideration of the increased wall thickness may affect the cooling efficiency.(3) Set up semi-constrained orientation at the bottom can reduce the stress concentration.
Injection side withstands the clamping force from mold clamping to mold opening and inner cavity withstands injection pressure, while the melt temperature affects the mold temperature distribution.
Solid works can import the model data to AWB in a high success rate [5].Auto mesh the model in AWB, set the unit type and define the material properties.
Set fatigue tool>Materials>Fatigue Strength Factor as 0.8; Loading>type>Zero-Based and Scale Factor as 1; Options>Mean Stress Theory>Soderberg.
Therefore, some suggestions for improving the fatigue life of the cavity are as follows, (1) Optimize the cooling tank fillet to reduce stress concentration and fillet mutation[7].(2) Improve the strength and stiffness as much as possible to increase the wall thickness of the cavity and reduce the maximum stress, at the same time take consideration of the increased wall thickness may affect the cooling efficiency.(3) Set up semi-constrained orientation at the bottom can reduce the stress concentration.
Online since: March 2012
Authors: S.S.R. Koloor, Abbas Azari, Jamal Kashani, Mohammed Rafiq Abdul Kadir, Zohreh Arabshahi
To determine the effect of material properties of TMJ implant, the behavior of TMJ implant should be studied under physiological loading.
Data on the material properties of the components were taken from previous published data considered to be homogenous, isotropic and linearly elastic (Table 1) [8-10].
Two different material properties, Ti-6Al-4V and cobalt-chromium alloy, were used for the implant, whilst the screws were assumed to be made of titanium alloy.
Isotropic material properties assigned to the components in FEA models.
Yield strain used as reference data to calculate the Safety Factor (SF).
Data on the material properties of the components were taken from previous published data considered to be homogenous, isotropic and linearly elastic (Table 1) [8-10].
Two different material properties, Ti-6Al-4V and cobalt-chromium alloy, were used for the implant, whilst the screws were assumed to be made of titanium alloy.
Isotropic material properties assigned to the components in FEA models.
Yield strain used as reference data to calculate the Safety Factor (SF).
Online since: August 2013
Authors: Na Yang, Yang Wang, Peng Li
Under long-term loads, a variety of damages of columns have occurred duo to the degradations of timber properties.
It can be attributed to three main factors: (1) material defects and degradation of timber; (2) structural defects; (3) long-term and complex external forces.
Timbers in ancient Tibetan buildings have been used for many years and its mechanical properties have been greatly changed.
Compared with the new timbers, all properties of the old timbers have significantly decreased.
Li, Tree species investigation and material properties analysis of timber in ancient Architecture.
It can be attributed to three main factors: (1) material defects and degradation of timber; (2) structural defects; (3) long-term and complex external forces.
Timbers in ancient Tibetan buildings have been used for many years and its mechanical properties have been greatly changed.
Compared with the new timbers, all properties of the old timbers have significantly decreased.
Li, Tree species investigation and material properties analysis of timber in ancient Architecture.
Online since: June 2013
Authors: Jean Savoie, Javad Gholipour, Mehdi Saboori, Henri Champliaud, Augustin Gakwaya, Priti Wanjara
Among these forming factors the material properties have a great influence on the formability of the product.
Several studies concerning the determination of properties for tubular materials have been reported in literature [6-8].
The effects of friction and material properties on formability of tubes were shown in their study.
The mechanical properties of the tube are listed in Table 2.
Table 2: Mechanical properties for annealed stainless steel 321 Material Elastic Modulus Yield Strength Stainless Steel 321 193 GPa 250 MPa The initial tube dimensions were: length (L0) = 228.6 mm, outer diameter (D0) = 50.8 mm and wall thickness (t0) = 0.9 mm.
Several studies concerning the determination of properties for tubular materials have been reported in literature [6-8].
The effects of friction and material properties on formability of tubes were shown in their study.
The mechanical properties of the tube are listed in Table 2.
Table 2: Mechanical properties for annealed stainless steel 321 Material Elastic Modulus Yield Strength Stainless Steel 321 193 GPa 250 MPa The initial tube dimensions were: length (L0) = 228.6 mm, outer diameter (D0) = 50.8 mm and wall thickness (t0) = 0.9 mm.
Online since: August 2013
Authors: Zhan Xiong Lu
Specifications with various parameters and connecting installation forms can be derived by only adjusting or replacing some parts of the main parts of the products, then a complete series with many specifications takes shape.
2) More suitable for marine needs, easier maintenance
Due to small cabin space and compact equipment layout, marine pump is asked to have a small form factor and be repaired easily in the event of a failure.
Mechanical noise and flow noise generated by the pumps pollute their operating environment and do harm to the physical and mental health of the operators, which is especially important for military vessels because that excessive noise will affect the quiet characteristic and concealment of the ship, and then reduce the security of the ship.
The workload of unplanned maintenance generated by the failure or damage of the mechanical seals accounts for about 60% of the maintenance of marine pump.
Therefore, it has become one of the important tasks of the designers of marine pumps that how to improve the designing level of mechanical seal, manufacturing quality and precision assembly, and reduce or eliminate the mechanical seal failure or damage effectively. ④ development of new-type material of marine pump Marine pump is a rotating machinery for pumping various liquids.
In the condition that plastic and other non-metallic materials are vigorously developed and promoted.Currently, bronze and brass material are used to cast the main components such as ship power pump body and impeller in China, which have good corrosion resistance and mechanical property.
Mechanical noise and flow noise generated by the pumps pollute their operating environment and do harm to the physical and mental health of the operators, which is especially important for military vessels because that excessive noise will affect the quiet characteristic and concealment of the ship, and then reduce the security of the ship.
The workload of unplanned maintenance generated by the failure or damage of the mechanical seals accounts for about 60% of the maintenance of marine pump.
Therefore, it has become one of the important tasks of the designers of marine pumps that how to improve the designing level of mechanical seal, manufacturing quality and precision assembly, and reduce or eliminate the mechanical seal failure or damage effectively. ④ development of new-type material of marine pump Marine pump is a rotating machinery for pumping various liquids.
In the condition that plastic and other non-metallic materials are vigorously developed and promoted.Currently, bronze and brass material are used to cast the main components such as ship power pump body and impeller in China, which have good corrosion resistance and mechanical property.