Sort by:
Publication Type:
Open access:
Publication Date:
Periodicals:
Search results
Online since: October 2014
Authors: Xian Min Chen, Di Guan, Feng Ping Yang, Qin Sun
Based on the energy theory and material fatigue test data, the plastic strain threshold for damage initiation was modified for HCF and LCF respectively.
The plastic strain threshold for damage initiation(pD) for HCF and LCF were modified respectively based on the energy theory and test data.
For constant amplitude loading, Nf can be written as (1) where, pD is the plastic strain threshold for fatigue damage initiation; △p is the effective plastic strain accumulated in a single load cycle; D is the damage, which is defined as the reduction of the effective bearing area[16]; dD is the damage increment for each load cycle; Dc is the damage threshold of fatigue failure.
pD=N0﹒△p=N0﹒2εp (7) With assumption that only tensile stress contributes to the microcrack initiation, pD can be written as (8) Compared with Eq.3, Eq.8 is more close to the truth in the following two aspects. 1) While the material is under uniaxial static tensile load, i.e. σeq,max=σu, =σy, then and pD obtained form Eq.8 equals εpd, which is consistent with the definition by Lemaitre. 2) The value of pD obtained from Eq.8 is smaller than that from Eq.3 and more close to the test data in LCF regime.
The plastic strain threshold for damage initiation(pD) for HCF and LCF were modified respectively based on the energy theory and test data.
For constant amplitude loading, Nf can be written as (1) where, pD is the plastic strain threshold for fatigue damage initiation; △p is the effective plastic strain accumulated in a single load cycle; D is the damage, which is defined as the reduction of the effective bearing area[16]; dD is the damage increment for each load cycle; Dc is the damage threshold of fatigue failure.
pD=N0﹒△p=N0﹒2εp (7) With assumption that only tensile stress contributes to the microcrack initiation, pD can be written as (8) Compared with Eq.3, Eq.8 is more close to the truth in the following two aspects. 1) While the material is under uniaxial static tensile load, i.e. σeq,max=σu, =σy, then and pD obtained form Eq.8 equals εpd, which is consistent with the definition by Lemaitre. 2) The value of pD obtained from Eq.8 is smaller than that from Eq.3 and more close to the test data in LCF regime.
Online since: April 2021
Authors: Jian Hui Wei, Xue Kang Zhu, Hong Yin, Xi Lin Luo
Results of the ultimate load and damage analyses are compared to experimental data.
These data were substituted into equation (1) and solving.
The hexahedral reduction elements C3D8R are used to mesh the rods.
The simulations of this study, which include failure mode and failure regions, were shown to be good agreement with experiment data.
These data were substituted into equation (1) and solving.
The hexahedral reduction elements C3D8R are used to mesh the rods.
The simulations of this study, which include failure mode and failure regions, were shown to be good agreement with experiment data.
Online since: November 2012
Authors: Surjatin Wiriadidjaja, Ermira Junita Abdullah, Waqar Asrar, Azmin Shakrine Mohd Rafie, Shuhaimi Mansor, Fadilah Hasim
This paper is meant to present an overview of the existing wind tunnels, accompanied with information on some important technical data, and added, to a lesser extent, with complementary information about backgrounds and design philosophies.
Review Table 1 summarizes data of the described four wind tunnels.
All sensors and transducers are integrated into modern and sophisticated data acquisition, reduction and control system (DARCS).
Review Table 1 summarizes data of the described four wind tunnels.
All sensors and transducers are integrated into modern and sophisticated data acquisition, reduction and control system (DARCS).
Online since: December 2013
Authors: Ming Jun Li, Yu Qiang Ou, De Hua Cai, Hui Jiang Mo
No adjacency matrix and special chain table will be formed during searching procedure; it takes advantage of basic table of node data and branch data to do searching work, and easily to get access with field data.
And they have to do some additional processing on the network data.
Algorithm To simplify the description, the following list will be the main data structure.
The data are commonly used in node table and branch tables, easy to get the distribution network data interface, suitable for on-site analysis of large-scale distribution network reliability calculation.
In the search process of a network could form no adjacency matrix or special relationship list, Directly uses the most basic data table and branch data table to search network.
And they have to do some additional processing on the network data.
Algorithm To simplify the description, the following list will be the main data structure.
The data are commonly used in node table and branch tables, easy to get the distribution network data interface, suitable for on-site analysis of large-scale distribution network reliability calculation.
In the search process of a network could form no adjacency matrix or special relationship list, Directly uses the most basic data table and branch data table to search network.
Online since: April 2013
Authors: Bukhari Manshoor, Amir Khalid
The reductions of emissions can be achieved with improvement throughout the mixing of fuel and air behavior.
Finally, the in-cylinder pressure data are analyzed to obtain the apparent heat release rate.
The experimental apparatus can be divided into several systems such as rapid compression machine, single-shot common rail system, data acquisition systems and exhaust emission measurement systems.
In addition, systems were added with the exhausts analyzer to observe the exhaust emissions and the in-chamber pressure data are acquired with piezoelectric pressure transducer.
Finally, the in-cylinder pressure data are analyzed to obtain the apparent heat release rate.
The experimental apparatus can be divided into several systems such as rapid compression machine, single-shot common rail system, data acquisition systems and exhaust emission measurement systems.
In addition, systems were added with the exhausts analyzer to observe the exhaust emissions and the in-chamber pressure data are acquired with piezoelectric pressure transducer.
Online since: January 2020
Authors: A.G. Barbosa de Lima, E. Rodrigues Mangueira, J. de Assis Cavalcante, N. Alves Costa
Curves adjustments to the moisture experimental data.From the mathematical models shown in Table 3, adjustments were made, for each experiment, to the experimental data of the dimensionless moisture content.
Table 6 – Parameters of the models adjusted to the moisture content data for the temperature of 50 ° C.
Table 7 – Parameters of the models adjustedto themoisture content experimental data for the temperature of 60°C.
Table 8 – Parameters of the models adjusted to the moisture content experimental data for the temperature of 70 °C.
According to the data presented in Table 8, the models that best fit the experimental data were Page Modified represented by Equation 16 and Pagerepresented by Equation 17.
Table 6 – Parameters of the models adjusted to the moisture content data for the temperature of 50 ° C.
Table 7 – Parameters of the models adjustedto themoisture content experimental data for the temperature of 60°C.
Table 8 – Parameters of the models adjusted to the moisture content experimental data for the temperature of 70 °C.
According to the data presented in Table 8, the models that best fit the experimental data were Page Modified represented by Equation 16 and Pagerepresented by Equation 17.
Online since: July 2015
Authors: Gerald Pinter, Steffen Stelzer
Of course, this will have to be confirmed by analyzing additional data sets, including round robin data from other laboratories.
Influence of da/dN averaging method [15] and data reduction on mode II Paris plot for the CFRP epoxy laminate shown in Fig. 4.
This will require additional data from round robin tests under mode I and mode II loading from different laboratories for comparative data analysis.
Threshold behavior will be one of the focal points in tests and data analysis.
Acknowledgment Mode II fatigue data obtained by Dr.
Influence of da/dN averaging method [15] and data reduction on mode II Paris plot for the CFRP epoxy laminate shown in Fig. 4.
This will require additional data from round robin tests under mode I and mode II loading from different laboratories for comparative data analysis.
Threshold behavior will be one of the focal points in tests and data analysis.
Acknowledgment Mode II fatigue data obtained by Dr.
Online since: May 2013
Authors: Ganiyu Amuda Yusuf, Sarajul Fikri Mohamed, Zakaria Mohd Yusof, Mohd Saidin Misnan
Moreover, contractors are required to develop environmental management plans that include items such as: energy and greenhouse gas adjustment; energy use reduction; review of energy sources; efficiency of water design; procurement and material types; sourcing; and waste reduction management.
Available: http://www.davislangdon.com/upload/StaticFiles/AUSNZ%20Publications/Info%20Data/CostOfGoingGreen.pdf.
Available: http://www.davislangdon.com/upload/StaticFiles/AUSNZ%20Publications/Info%20Data/CostOfGoingGreen.pdf.