Search results

Based on the energy theory and material fatigue test data, the plastic strain threshold for damage initiation was modified for HCF and LCF respectively.
A damage mechanics-finite element full-couple method was adopted to simulate the process of fatigue damage evolution, incorporating elastic modulus reduction due to fatigue damage.
The plastic strain threshold for damage initiation(pD) for HCF and LCF were modified respectively based on the energy theory and test data.
pD=N0﹒△p=N0﹒2εp (6) With assumption that only tensile stress contributes to the microcrack initiation, pD can be written as 　 　　 (7) Compared with Eq.2, Eq.7 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.7 equals εpd, which is consistent with the definition by Lemaitre. 2) The value of pD obtained from Eq.7 is smaller than that from Eq.2 and more close to the test data in LCF regime.

Tensile strength [MPa] Yield strength [MPa] Elongation [%] Reduction of area [%] 1067 995 9.4 47.3 The specimen size of tensile test has been shown in Fig. 2.
In addition, the test data also reveals that the yield strength and tensile strength of Ti-38644 alloy after solution are relatively consistent, which means that the work hardening is not obvious in this alloy during the deformation process.
Under this heat treatment system, better mechanical property can be achieved with the tensile strength 1330MPa, elongation and reduction of area 10% and 45% respectively.
Fig. 6 Strength, elongation and reduction of area of Ti-38644 alloy after ST: (a) solution at 800℃; (b) solution at 815℃.
(3) The tensile strength and yield strength decrease gradually, while the elongation and the reduction of area increase with the aging temperature increasing.

This simulation achieves the goal of a backorder ratio of 0% as well as another reduction of total supply chain costs.
This simulation also achieves the goal of a backorder ratio of 0% as well as reduction of total supply chain costs compared to case 2.
The goal of the reduction of backorder ratios usually requires an expansion of the warehouse capacity and an upward adjustment of reorder points.
We suggest that follow-up studies should include these costs into their considerations provided that reliable data are available. 5.
If reliable product sales data are available, we suggest that these data should be included in follow-up studies that should focus on multiple goals such as operating profits and 0% backorder ratios.

The goal of this study was to obtain quantitative data about H-penetration through the DN by the measurements of the penetration kinetics at different temperatures.
The points correspond to reduced to unity experimental data values, the solid lines obtained by fitting with the difference of two exponential processes.
The Arrhenius plots derived from the data of the kinetic experiments.
All curves are normalized to the saturation values which were obtained from the data of RBA at 380 K for 3 hours.
Acknowledgments Experimental data presented in this work were obtained using equipment of the Interdisciplinary Recourse Center for Nanotechnology at St.

And they also include data exchange and information sharing between behavior agents through various nodes INTERNET.
The related organizations adopt the uniform data format and the requirement of authority.
You can use WebService-based XML technology to achieve data synchronization.
Meanwhile, it establishes data sharing system and data distribution system.
Osborn：Review of US ESCO industry market trends: an empirical analysis of project data, J.

These data also add support for mechanisms requiring the need for both dissociated BPD and TSD for carrot formation.
In analyzing substrate effects on epi-layers, it is important to consider reduction or enhancement of defects by the epitaxial method.
The data is organized from the crystal level, substrate and epi-wafer level, and defect level.
The Weibull threshold probability distribution function is fitted to the data, providing the parameters showing the position of the most data in the scale parameter, shape of the data, and a threshold value, for which a distribution may have a turn-on value.
Once again, the data is fitted, resulting in minimum distances to the carrot of 3 mm for BPD and 8 mm for TSD.

Reduction of CCHS open porosity due to higher content of WG (10 %) leads to lower absorption of cement paste.
According to all abovementioned obtained data of the open porosity and water uptake, characteristic macroscopic void volume is sufficient for water storage by capillary forces.
After analysing of open porosity data we can conclude that FGW-B, FGG-B and KER-B samples have higher capacity for water uptake both in absolute values and relative values than any of CCHS containing samples (Fig. 3).
Data on compressive strength, specific compressive strength and apparent density are presented in Fig. 4.
This conclusion is supported by data summarized in Fig. 4.

Experimental Determination of the Strength and Modulus of Elasticity Static Bending Laminated Composites Determination of strength and modulus of elasticity in laminated composites based cotton fabric presents considerable difficulties, but the data used for design calculations can be obtained using the method (based composite materials cotton fabric and phenolic resin).
The data can be plotted directly on force-displacement coordinates.
To determine the material data used tensile testing machine INSTRON type 5587 and the program of experimentation is based on the following: - three thicknesses were chosen the elements of the 2, 6 and 10 mm; - were made sets of five specimens for each material thickness type 2082 HGW manufacturer specifications.
It was agreed at this stage: test type ( Type ), data material (specimen shape, material thickness, specimen width, the distance between the car and the distance between landmarks jaws between which measurements) speed traction machine limits the rate of acquisition machine (10 points / second) output file type (ASCII or DIF - data Interchange format, a file format that can be picked up any statistical data processing programs ), the type of output data will be collected (the program provides users an estimated 200 data types specific to each type of test); output data samples are breaking force [kN] , elongation [mm] maximum voltage reached in the material [MPa] , elongation corresponding relative maximum voltage of the material [%]; outside data speci0fied above, save the raw data of such tests (characteridtic curve coordinates force [kN] – displacement [mm].
This data is found in the form of pairs of points in the coordinates above each analysis in ASCII format.

A data programmed by VB is send from the host computer software, if the data can be correctly fed back through controller, the communication is successful, otherwise, the system need to be modified.
The second problem: the data can not be return to host computer.
Comparison and Analysis of Test Debugging includes 4 stages: presetting values of program, data collection, data processing, and data analysis.
After collected the data, vibration frequency-time curve is got as Figure 1.
The experiment data shows that frequency should not be too high, less than 200Hz generally.

Comparing the full curve with the experimental data (full triangles) a reduction of the FWHM by a factor 1.5 is still possible.
By comparing our data with data cited in literature the dependence of the FWHM on film thickness has to be taken into account.
(triangles own data, circles data from Ref. [6], squares data from Ref. [7]). agreement with measurements of Ref
Measured ω−2Θ scan of 15 x Al0.3Ga0.7N/GaN MQW structure (solid line) and simulated data (dotted line).
From the X-ray diffraction data an InyGa1-yN well thickness of 5.6 nm and a GaN barrier thickness of 12.1 nm are obtained.