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Online since: July 2022
Authors: Thomas Tröster, Tim Stallmeister
Three-point bending tests and optical measurement technologies are used to characterize the failure behavior and mechanical properties of the produced hybrid beams.
The mechanical properties of injection molded FRPs are limited because considerable fiber damage occurs in the manufacturing process.
The mechanical properties of the metal belt and core structure materials are presented in Table 1.
Bending properties.
A hybrid beam without process-related defects, in contrast, failed as planned due to cracking of the lower metal belt and exhibited high mechanical properties.
The mechanical properties of injection molded FRPs are limited because considerable fiber damage occurs in the manufacturing process.
The mechanical properties of the metal belt and core structure materials are presented in Table 1.
Bending properties.
A hybrid beam without process-related defects, in contrast, failed as planned due to cracking of the lower metal belt and exhibited high mechanical properties.
Online since: January 2010
Authors: Rong Di Han, Jun Zhou
The magnetic effect of cutting emulsion is concerned with some factors such as
magnetic density, magnetic time, and so on.
This mainly results from improved cooling and lubricating properties of magnetized emulsion.
This indicates that cooling and lubricating properties of magnetized emulsion are certainly improved.
In dry cutting, color of the chip is filemot, and it becomes weak when using emulsion, which indicates temperature of the cutting zone is higher; When using magnetized emulsion, chip becomes white and bright, which shows that cooling and lubricating properties of magnetized emulsion is better than the cutting emulsion.
So the ability that cutting emulsion penetrates into the cutting zone affects the cooling and lubricating action of the cutting emulsion directly.
This mainly results from improved cooling and lubricating properties of magnetized emulsion.
This indicates that cooling and lubricating properties of magnetized emulsion are certainly improved.
In dry cutting, color of the chip is filemot, and it becomes weak when using emulsion, which indicates temperature of the cutting zone is higher; When using magnetized emulsion, chip becomes white and bright, which shows that cooling and lubricating properties of magnetized emulsion is better than the cutting emulsion.
So the ability that cutting emulsion penetrates into the cutting zone affects the cooling and lubricating action of the cutting emulsion directly.
Online since: August 2012
Authors: Zhong Min Liu, Jing Ji, Xue Hua Liu
This article introduces two kinds of frame structure system structure for steel structure and reinforced concrete structure, analyzes the similarities and differences in the structural properties, structural occupied area, time limit for a project, project cost and comprehensive economic benefits and other aspects.
Reinforced concrete structure makes reasonable use of two kinds of material mechanical properties for reinforcing steel bar and concrete, this application has a history of nearly 200 years [1-4].
Using different structural materials, the upper structure construction period has a greater impact, but also suffers from the influence of environmental and construction season, geological conditions and many other factors.
Moreover, structural material also affects on external wall maintenance cost, but the external costs of maintenance structure is considered to impact of overall cost in this project.
Conclusions This article introduces two kinds of frame structure system structure for steel structure and reinforced concrete structure, analyzes the similarities and differences in the structural properties, structural occupied area, time limit for a project, project cost and comprehensive economic benefits and other aspects.
Reinforced concrete structure makes reasonable use of two kinds of material mechanical properties for reinforcing steel bar and concrete, this application has a history of nearly 200 years [1-4].
Using different structural materials, the upper structure construction period has a greater impact, but also suffers from the influence of environmental and construction season, geological conditions and many other factors.
Moreover, structural material also affects on external wall maintenance cost, but the external costs of maintenance structure is considered to impact of overall cost in this project.
Conclusions This article introduces two kinds of frame structure system structure for steel structure and reinforced concrete structure, analyzes the similarities and differences in the structural properties, structural occupied area, time limit for a project, project cost and comprehensive economic benefits and other aspects.
Online since: September 2016
Authors: Lu Kuan Qi, Yi Zhou Yang
Steel Corrosion affects severely on the life and durability of RC structures.
By comparing mechanical property of different concrete material models provided in Ls-dyna, the applicability of concrete models are examined, regularity of crack development, plastic deformation ability and ultimate flexural capacity of local corroded RC beams are analyzed.
Geometrical details of RC beam subjected to local corrosion and material properties of concrete and rebars are tabulated in Tables 1 and 2.
It can be concluded that MAT159 (CSC)model predicts bending, tension and compression properties of concrete during the three point bending test, UUT and UUC tests, so that MAT159 model is chosen as the concrete model in the present research.
The effects of the high corrosion rates induced pitting corrosion and the deterioration of mechanical property of concrete on the ultimate capacity and plastic deformation capacity of corroded RC member are currently under investigation.
By comparing mechanical property of different concrete material models provided in Ls-dyna, the applicability of concrete models are examined, regularity of crack development, plastic deformation ability and ultimate flexural capacity of local corroded RC beams are analyzed.
Geometrical details of RC beam subjected to local corrosion and material properties of concrete and rebars are tabulated in Tables 1 and 2.
It can be concluded that MAT159 (CSC)model predicts bending, tension and compression properties of concrete during the three point bending test, UUT and UUC tests, so that MAT159 model is chosen as the concrete model in the present research.
The effects of the high corrosion rates induced pitting corrosion and the deterioration of mechanical property of concrete on the ultimate capacity and plastic deformation capacity of corroded RC member are currently under investigation.
Online since: September 2007
Authors: Alexander M. Korsunsky, Xu Song, Jonathan Belnoue, Leo D.G. Prakash, Michael J. Walsh, Daniele Dini
Long term performance of nickel base superalloy components under cyclic thermo-mechanical
loading depends on the resistance to crack initiation and propagation.
Successful description of crack propagation in nickel base superalloys requires the ability to predict fatigue crack growth rates (FCGRs) and trajectories under complex non-proportional thermo-mechanical loading.
Constitutive behavior of damageable materials must reflect the fact that degradation of material properties is never confined to a single point, but in fact is 'smeared out' over a certain neighborhood.
Dwell effects: oxidation and creep Crack growth rates under the conditions of thermo-mechanical fatigue, particularly in the presence of tensile dwells, are strongly affected by creep and oxidation.
When the use of maximum stress intensity factor maxK and its cyclic range K∆ can still be justified, these two parameters offer a sound basis for incorporating spectrum loading and dwell effects into reliable predictive models of fatigue crack growth.
Successful description of crack propagation in nickel base superalloys requires the ability to predict fatigue crack growth rates (FCGRs) and trajectories under complex non-proportional thermo-mechanical loading.
Constitutive behavior of damageable materials must reflect the fact that degradation of material properties is never confined to a single point, but in fact is 'smeared out' over a certain neighborhood.
Dwell effects: oxidation and creep Crack growth rates under the conditions of thermo-mechanical fatigue, particularly in the presence of tensile dwells, are strongly affected by creep and oxidation.
When the use of maximum stress intensity factor maxK and its cyclic range K∆ can still be justified, these two parameters offer a sound basis for incorporating spectrum loading and dwell effects into reliable predictive models of fatigue crack growth.
Online since: April 2008
Authors: Jan G.M. van Mier, Dominik Meyer, Hau Kit Man
The material structure cannot assist in the arrest of
the large energetic cracks other than locally affecting the crack path.
We will consider the compression test as structural test since the outcome is very much dependent on boundary conditions, size, shape and other structural factors.
The flexural strength is also affected and decreases with increasing foam content.
Material properties must therefore be determined at a smaller scale than the above described cube compression test; nevertheless all the same constraints are met and one is never certain whether the adopted properties are true material properties.
-K. and Van Mier, J.G.M., Fracture of Foamed Cementitious Materials: A Combined Experimental and Numerical Study, in Proceedings IUTAM Symposium on 'Mechanical Properties of Cellular Materials', (Zhao, H. and Fleck, N.A., eds.), LMTCachan, Paris, France, September 17-21, (2007), Kluwer Academic Publishers, Dordrecht (in press)
We will consider the compression test as structural test since the outcome is very much dependent on boundary conditions, size, shape and other structural factors.
The flexural strength is also affected and decreases with increasing foam content.
Material properties must therefore be determined at a smaller scale than the above described cube compression test; nevertheless all the same constraints are met and one is never certain whether the adopted properties are true material properties.
-K. and Van Mier, J.G.M., Fracture of Foamed Cementitious Materials: A Combined Experimental and Numerical Study, in Proceedings IUTAM Symposium on 'Mechanical Properties of Cellular Materials', (Zhao, H. and Fleck, N.A., eds.), LMTCachan, Paris, France, September 17-21, (2007), Kluwer Academic Publishers, Dordrecht (in press)
Online since: August 2014
Authors: T.X. Yu, Yan Fei Xiang, Min Wang, Li Ming Yang
The KPIs have five factors: Effective stroke ratio (ESR), Non-dimensional Load-carrying capacity (NLC), Effectiveness of energy absorption (EEA), Specific energy absorption capacity (SEA), Stableness of load-carrying capacity (SLC).
Many factors may affect the energy absorption behavior of tubular structures made from different materials or different configurations.
The solidity ratio (φ) is a dimensionless parameter indicating the geometric property of tubes of different configurations.
Slsobky, Further experimental investigation on the eccentricity factor in the progressive crushing of tubes.
Jones, Energy-absorbing effectiveness factor, Int.
Many factors may affect the energy absorption behavior of tubular structures made from different materials or different configurations.
The solidity ratio (φ) is a dimensionless parameter indicating the geometric property of tubes of different configurations.
Slsobky, Further experimental investigation on the eccentricity factor in the progressive crushing of tubes.
Jones, Energy-absorbing effectiveness factor, Int.
Online since: December 2016
Authors: Ichiro Shimizu
This fact implies that the texture of magnesium alloys is an important factor affecting not only on the plastic anisotropy but also on the ductility and formability with regard to the loading direction [4, 5].
Mechanical Twin during Compression.
It suggests that the mechanical twin plays important role on the occurrence of fracture.
The deformation patterns also affected on the fracture, which was apparently restrained under the equi-biaxial compression than the uniaxial compression, on both cast and extruded alloys.
Tsujimura, Mechanical properties and microstructure of AZ31 magnesium alloy during high temperature deformation, J.
Mechanical Twin during Compression.
It suggests that the mechanical twin plays important role on the occurrence of fracture.
The deformation patterns also affected on the fracture, which was apparently restrained under the equi-biaxial compression than the uniaxial compression, on both cast and extruded alloys.
Tsujimura, Mechanical properties and microstructure of AZ31 magnesium alloy during high temperature deformation, J.
Online since: October 2018
Authors: Markku Keskitalo, Kari Mäntyjärvi, Antti Järvenpää, Mikko Hietala, Aappo Mustakangas, Tero Jokelainen
Laser welding can be utilized to decrease the production costs (high velocity, one side welding, etc), but also to optimize the panel properties due to low heat input in laser welding.
Mechanical properties of the test materials are shown in Table 1 and the flow curves in Fig. 3.
Tensile properties for the test materials [Data taken from ref. 10].
Plastic properties were taken into account by utilizing the tensile test results (Fig. 3.).
Sandwich panels with different structural dimensions were tested to determine the role of the panel properties on buckling resistance.
Mechanical properties of the test materials are shown in Table 1 and the flow curves in Fig. 3.
Tensile properties for the test materials [Data taken from ref. 10].
Plastic properties were taken into account by utilizing the tensile test results (Fig. 3.).
Sandwich panels with different structural dimensions were tested to determine the role of the panel properties on buckling resistance.
Online since: April 2021
Authors: Mathias Bobbert, Gerson Meschut, Max Böhnke, Christian Roman Bielak, Moritz Rossel
In particular, the frictional behavior between the sheet metals affects the geometrical formation of the clinched joint significantly.
Since the test setup is one of the instrumented tests, an independent consideration of the influencing factors is possible.
Furthermore, the occurring friction is influenced by various factors that are relevant in forming processes, for example contact pressure, relative speed, temperature and surface change due to abrasion or adhesion wear.
A separation of the specimens using machine cutting processes, wire erosion or water jet cutting is not reasonable, as this processes use cooling lubricants or other media, which may change the surface condition or friction properties.
Numerical simulation was used to determine the properties of such a mounting.
Since the test setup is one of the instrumented tests, an independent consideration of the influencing factors is possible.
Furthermore, the occurring friction is influenced by various factors that are relevant in forming processes, for example contact pressure, relative speed, temperature and surface change due to abrasion or adhesion wear.
A separation of the specimens using machine cutting processes, wire erosion or water jet cutting is not reasonable, as this processes use cooling lubricants or other media, which may change the surface condition or friction properties.
Numerical simulation was used to determine the properties of such a mounting.