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Online since: July 2015
Authors: Aurel Valentin Bîrdeanu
Introduction The implementation of lightweight materials both metallic and non-metallic into the automotive industry is strongly related to the car body weight reduction while striving to keep the structure safe and with the proper response to the eventual impacts and / or crashes.
X1 Pp X2 Iav X3 dp Y1 τf 1 -1.0 -1.0 -1.0 τf1 2 1.0 -1.0 -1.0 τf2 3 -1.0 1.0 -1.0 τf3 4 1.0 1.0 -1.0 τf4 5 -1.0 -1.0 1.0 τf5 6 1.0 -1.0 1.0 τf6 7 -1.0 1.0 1.0 τf7 8 1.0 1.0 1.0 τf8 9 0.0 0.0 0.0 τf9 For each BM a preliminary experimental program was undertaken in order to establish an experimental zone to investigate statistically, based on previous data related to these types of materials.
Iav [A] Pp [W] dp [ms] Τf [N/mm2] 1 30 1250 2.4 98.44 2 40 1250 2.4 340.12 3 30 1450 2.4 113.76 4 40 1450 2.4 259.90 5 30 1250 3.2 320.99 6 40 1250 3.2 304.90 7 30 1450 3.2 436.36 8 40 1450 3.2 563.24 9 35 1350 2.8 293.14 Regarding the shear strength testing one can mention that all the samples did break in the weld and that two joint types were evaluated by means of statistical modeling software using the data for the calculated shear strength values.
An example table of such data is presented in Table 3.
Similarly, the data for the 1.2mm thick DP 600 joint is presented in Figure 7.
Online since: June 2008
Authors: Wei Hua Zhang, Xu Chen, Gang Chen, Xue Mei Luo
Torque and torsional degree during the experiment were able to be monitored and stored through a data acquisition system.
For each selected loading cycle, the computer acquired 100 data points per channel, and those data could be used for further analysis.
The experimental data were obtained from the specimens located in the first row to the third row of the bulk plate, as given in figure 4 (a), (b) and (c) respectively.
In the ASTM standard for strain-controlled fatigue testing, a 50% reduction of maximum load was recommended in defining the fatigue life [9].
Since the fatigue life of specimen W3-1 is much less than the results of other specimens, we believe that this one must have some flaw inside, such as cavity, slag and microcrack etc., which have a great influence on the stress strain behavior and damage evolution of the material, therefore the fatigue data for W3-1 will be eliminated.
Online since: October 2012
Authors: Mao Zhu Jin, Pei Yu Ren, Bin Wu
The practices in lean manufacturing have evolved through several stages and reached to the status to include cost reduction, quality control and performance benchmarking as stated by Abdelmalek et al. [1].
In order to perform the quantitative analysis, data is to be collected according to historical occurring data.
Since the prediction and identification through the historical data can never be exact, different status will be considered and analyzed.
So, through observed data on possible conditions of load level associated with the data of both operator number levels and bottleneck levels, the conditional probabilities can be calculated.
Online since: October 2006
Authors: Lee Yul Kim, Hyun Jun Cho, Won Yeop Park, Kyou Seung Lee, Sun Ok Chung
Materials and Methods Field Data Collection.
Details on data collection methods are provided by NIAST [4].
Adjusted CI values were calculated from measured CIs since (1) CIs are dependent on soil conditions (i.e., water content) at the time of data collection, and (2) for rice fields, CI data is generally collected in non-irrigated field conditions before transplanting or after harvesting.
Examination of the data showed considerable spatial and vertical variations in all of the surveyed field variables, and for the following parameters the maximum values were greater than double the minimum values: DT, DMCI, MCI, SH_shallow, DH, CR, WC_shallow, WC_deep.
Examination of CI profiles confirmed possibility of site-specific tillage or soil management based on the variations in existence and degree of restrictive layers, and possible reduction in labor and energy for soil management practices. 0 1 2 3 Cone Index, MPa 40 30 20 10 0 Depth, cm 0 1 2 3 Cone Index, MPa 40 30 20 10 0 Depth, cm 0 1 2 3 Cone Index, MPa 40 30 20 10 0 Depth, cm 0 1 2 3 Cone Index, MPa 40 30 20 10 0 Depth, cm Type A Type B Type C Type D Fig. 1 Types of the CI profiles observed in typical Korean rice paddy fields (measured and adjusted CI profiles are denoted as solid and dotted lines, respectively).
Online since: October 2008
Authors: Marc Bohner, Nicola Döbelin, Manuel Eggimann, Martin Fisch, Tobias J. Brunner, Wendelin J. Stark
High-temperature XRD data were collected with a Panalytical X'Pert Pro MPD diffractometer using Ni-filtered CuKα radiation.
Data sets were collected from 9-65° 2θ with a step size of 0.016° 2θ and a counting time of 1 second per step at the following temperatures: 25, 500, 525, 550, 575, 600, 650, 700, 750, 800, 850, 900, 950, 1000, and again at 25 °C.
During data collection the temperature was held constant.
Prior to the refinements of the high-temperature data sets, the instrument resolution function and peak asymmetry was determined with the "NIST SRM 660a - Line Profile LaB6" standard.
Urs Eggenberger for his support with the XRD data collection.
Online since: March 2016
Authors: Sławomir Kciuk, Arkadiusz Mężyk, Paweł Kielan, Krzysztof Wilk
It leads, in fact, to effective shortening of time to enter the market and the reduction of costs connected with the building of prototypes.
It enables communication (data transfer) between DSPvLMS signal processor card and an implemented program package MATLAB/Simulink mathematical model of mechanical system’s performance · Program package MATLAB/Simulink which was implemented with mathematical model of mechanical model of work system with an extra block enabling communication between LMS Virtual .Lab program ( mathematical model of mechanical system) · LMS Virtual.Lab- integrated programming package for simulation and optimization of mechanical systems’ performance and analysis of dynamic phenomena.
Data interchange between application DSPvLMS is held by a block with a previously compiled s-function with properly defined data input/output.
Data from a model of one level of easiness in LMS VL environment are transmitted through plantout block (block of data interchange between MATLAB and LMS VL habitat).
Online since: March 2011
Authors: Xian Lei Cao, Zhi Feng Zhang
For the traditional method and optimization methods, the force control-step in lifting process respectively have 20 and 9, moreover, with the number of floors increasing, this reduction will be more significant, and thus shorten the construction period, The comparison of optimizing the force control steps number before and after is shown Tab.1.
Therefore, function of control system means: (1) the group of hoists can realize synchronized actions, including the overall cluster, local linkage, single-point single-action, etc.(2)according to requirement of construction technology continuous construction are done, and the process can be automatically or semi-automatically modified according to different working conditions.(3) The height deviation of the hanging points limit the design range permitted by 5mm.(4)Automatically acquire, store the system produced large amounts of data in lifting process, and carry a variety of search and analysis, help engineers and technicians to do system debugging, technical analysis and technical summary.
Computer-controlled part of the acquisition uses the electric control to drives hydraulic system and electrical control part of the acquisition to collect the state hydraulic systems and the data of hanging points for regulation as a control.
This system mainly includes below functions: starting or stopping system, stopping when an emergency for lifting equipment, switching system operation manner, setting and controlling system parameters correction, printing all kinds of charts and tables, stored automatically all kinds of important data, searching and analyzing historical data, and so on.
Data analysis subsystem.
Online since: January 2005
Authors: T. Nishida, Kenji Wakashima, Hideki Hosoda, Tomonari Inamura
The results shown here are calculated for the composite system, 10 vol.% alumina fiber-reinforced piezoelectric polymer P(VDF-TrFE), using the following constituent property data: through-the-thickness relative permittivity (i.e., κ /ε0, where ε0 is the vacuum permittivity) 7.5 and 8.5, in-plane Young's moduli 3 GPa and 350 GPa, Poisson's ratios 0.35 and 0.24, and in-plane piezoelectric d-constants 10.1 pC/N and zero, for the P(VDF-TrFE) matrix and alumina fiber, respectively.
More importantly, this system gives zero piezoelectric strain coefficient at θ = 20˚ in the X1 direction without making any substantial reduction from the matrix d-value in the transverse (X2) direction-compare 8.1 pC/N at θ = 70˚ with 10.1 pC/N for P(VDF-TrFE); see arrows in Fig. 2.
Figure 3 shows the variations of d31, d32 and the resulting d31− d32 with the fiber volume fraction, which are calculated using the following input data: κ /ε0 = 1350, E = 84 GPa, ν = 0.28 and d = −130 pC/N for PZT, and κ /ε0 = 8.5, E = 350 GPa, ν = 0.24 for alumina.
Following a standard technique, we have measured the frequency dependence of admittance in the range 100 kHz to 2 MHz, which yields the data listed in Table 1.
Data measured in 19 vol.% alumina ribbon-reinforced PZT composite UD lamina. 3 µµµµm Al2O3-1wt.% SiO2 PZT[5] V.F.
Online since: February 2014
Authors: Razali Idris, Noor Hidaya Bujang
Tetrahydrofuran (an analytical grade, J.T Baker), Ethylene carbonate, EC (Aldrich product with purity, 99.8%) and propylene carbonate, PC (Aldrich product with purity, 99.8%) were used as received Ionic conductivity measurements at room temperature were conducted using a Solartron 1255 impedance analyzer coupled to a computer installed with Z-plot software for data handling in the test frequency range of 0.1 Hz to 75 kHz.
Thermal data were obtained from differential scanning calorimeter (DSC) recorded in a Mettler TA4000 instrument, which was run under liquid nitrogen atmosphere.
Table 1 presents the thermal data of non solvated and solvated ENR-50 based electrolytes.
The thermal data indicate that the presence of solvent EC/PC in the ENR electrolyte system influenced interaction between polymer chain and lithium salt to a great extend with shifted Tg values was observed.
Conclusion Thermal behavior showed a reduction of glass transition temperature for solvated ENR50/LiN(CF3SO2)2 polymer electrolytes but increased Tg values at higher lithium salt concentration for non-solvated ENR electrolyte systems.
Online since: February 2014
Authors: Yong Zhang, Shi Qing Zhang, Jin Kai Liu, Chao Dong
According to No. 3-5 coal formations geological data in 8100 working face of Tongxin mine, the binder in this test is lime and gypsum.
The arrangement of measuring point and working face are shown in Figure 1: Fig1 Schematic diagram of measuring points Experimental procedure and analysis of results In this experiment, the angle of displacement measuring point which measured by electronic theodolite is used as the original data.
Overlying strata movement characteristics Displacement observation points are arranged and each observation point measured by electronic theodolite is used as the original data before the experiment.
After the experiment, types of strata displacement diagrams which are obtained through dealing with the data from simulation experiment are respectively shown in figure 3-5.
Observation data from the measuring points shows that the vertical displacement and horizontal displacement increases with the face advance development.
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