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Analysis for the Joining of Light Alloys by Numerical Experiment Helena Kravarikova* Faculty of Materials Science and Technology in Trnava, J.Bottu 25, 917 24 Trnava, Slovak Republic, Institute of Applied Informatics, Automation and Mechatronics helena.kravarikova@stuba.sk Keywords: modeling, simulation, temperature field, numerical experiment, FEM, light alloys Abstract.
Material models are developed based on the thermos-physical properties of the materials actually used, depending on the temperature change.
On the accuracy of the results have affect thermo physical properties of materials depending on the temperature changes.
In Applied Mechanics and Materials: Novel Trends in Production Devices and Systems, Vol. 474, pp. 297–302.
In: International Journal of Education and Research [elektronický zdroj], Vol. 1, No. 12, online, 10 p.

The use of straight conduits facilitated the removal of support material using small diameter drill bits and wire.
[8] Pissasale, A., &Ahmed, N.A., “Theoretical calibration of a five hole probe for highly three dimensional flow,” International Journal of Measurement Science and Technology, Vol. 13, July, 2002, pp.1100-1107
M., “Impulsively tarted Turbulent Jets,” AIAA Journal, Vol. 35, No. 4, 1997, pp. 657–662
S., “Effects of Pulsing on a Vortex Generator Jet,” AIAA Journal, Vol. 41, No. 12, 2003, pp. 2309–2315
E., “Exponentially Accelerating Jet in Crossflow,” AIAA Journal, Vol. 36, No. 6, 1998, pp. 1002–1009

The second challenge is the selection of the course materials.
The small screen size, limited navigation, and loss of contextual information of the course materials in addition to unintuitive technology can lead to a fragmented and frustrating learning experience.
And some learners may suffer from reduced psychological comfort and may find themselves spending unnecessary time trying to become better oriented with reading materials delivered on mobile devices.
For the teacher, in this layer, we provide lesson and course management service for teachers, they can open a new course, upload materials associated with the topic, review student's learning status.
Kukulska-Hulme, "Students experiences with PDAs for reading course materials," Personal Ubiquitous Computing, vol.7, pp. 30-43, 2003

Farrugia, Micromechanical modelling of Void Healing, Micromechanical Modelling of Void Healing, (2013), IUTAM Symposium on Advanced Materials Modelling for Structures (AMMS 2012), Advanced Structured Materials 19, 1-8
Pilling, The kinetics of isostatic diffusion bonding in superplastic materials, Mat.
Bernacki, Void closure criteria for hot metal forming: A review, Journal of Manufacturing Processes 19 (2015) 239–250
[15] Xiao-Xun Zhang, et al, Multiscale analysis of void closure for heavy ingot hot forging, Modern Applied Science 6 (2012) N10
Shirizly et al, On damage distribution in the upsetting process of sintered porous materials, Int.

Ultrasonic TOFD in the application of thick wall tube welding seam detection pre-research LU cheng1 WANG QI 2 LIU fang-nan3 (1WuHan University of Technology college of energy and power engineering energy power system and automation, China HuBei WuHan, 430063, Email:459244021@qq.com 2Baosteel steel bar steel group Principal Engineer, China Shanghai Baoshan, 201900, Email:2230926727@qq.com 3China university of geosciences College of arts and media Journalism and communication, China HuBei WuHan,430074 Email:404897472@qq.com） Key words: TOFD; Weld detection; Thick wall tube welding; ultrasonic; scanning Abstract: This article firstly introduces the ultrasonic TOFD (Time-of-flight - Diffraction) detection technology of detection principle, advantages and disadvantages, and then summarizes the ultrasonic TOFD technique related testing standard, finally combining the reality of tube mill, analyses the pipe material testing near the surface of the blind area and radian impact
A) scans near surface defects B) wall not fusion defect scan C) slag defect scan D) hole defect scan Figure 6 Weld defect inspection record legend TOFD detection technology Chinese special equipment inspection research center in China in the national "five-year" science and technology research plan was carried out by ultrasonic endpoint diffraction technology research, and develop special focusing probe, measuring accuracy of the height of defects of 0.5 mm.
With phased array TOFD method, do not need to adjust the probe position, can change detection Angle and focus depth, so easily according to the thickness, material quality and standard requirements, selected the best testing conditions. 3.2 radian pipe problem Due to tube inevitably has the curvature, considering the probe mechanical structure layout, small diameter, wall thickness, thin tube, the probe spacing not less, when the probe span is more than twice the wall thickness, will lead to accept the probe signal analysis is relatively complex.
At present HFW pipe diameter from 219 mm to 610 mm, wall thickness from 4.0 mm to 4.0 mm, can be used to do the test material.Finishing the weld ultrasonic coupling channel by finding a way.
Journal of mechanical engineering. 2000, 36 (5) : 54 ~ 57 [4] Liu Zhipeng Cai Yingmao.

Well known sensing materials are, for example, SnO2, ZnO and TiO2 [1].
These materials may overcome the disadvantages like the lack of selectivity or dependence on humidity of the established materials.
Example SEM images of the volume doped materials.
Amis, Combinatorial materials science: Reaching beyond discovery, Nature Materials 3 (2004) 83-85
Maier, A Flexible Database for Combinatorial and High-Throughput Materials Science, QSAR Comb.

When experiment on Simulation test-bed, this research group only set inductive transducer, whose gear material is 45 steel, the teeth is 25 and module is 2.The test runs without test cup(shell).
Science and technology innovation and application of press. 2013(25)
AnHui University of Science and Technology,2013
AnHui University of Science and Technology,2013
Research of accuracy of flow measurement with virtual instrument [J].Journal of Transducer Technology. 2004, 23(8)

Experimental procedure Materials.
The content of pumping agent for the total cementing material was 0.50%~0.70% and design slumps were required up to 150~200 mm.
Vol. 18(1988), p. 426-430 [13] Lin Peng, Wu Xiaomei, Fan Yueming and et al: Industrial Construction Vol. 39 (2009), September p. 99-102 (In Chinese) [14] Qiu Honglin and Ye Qing: Journal of Zhejiang University of Technology Vol. 36 (2008), p. 436-440 (In Chinese) [15] Zhu Jingsong, Ye Qing and Zhang Tiangang: New Building Materials Vol. 35 (2008), May p. 4-7 (In Chinese) [16] Ha-Won Song, Seung-Jun Kwon, Keun-Joo Byun and et al: Cem.
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Lam: Construction and Building Materials Vol. 11 (1997), p. 383-393

FRC Material Models.
The resistance is calculated by a nonlinear analysis using design values of the material parameters , where are characteristic values and partial safety factors of materials.
Acknowledgement The presented results are based on the research performed within projects TA03011564 "Computer model for FRC material" from Czech technological agency and P105-14-10930S "SPADD - Spatial variability degradation and damage in reliability analysis of concrete structures" by the Czech Science Foundation (GA CR).
[2] Cervenka, V., Reliability-based non-linear analysis according to fib Model Code 2010, Structural Concrete, Journal of the fib, Vol. 14, March 2013, ISSN 1464-4177, (2013) 19-28, DOI: 10.1002/suco.201200022
Available at: http://bauwesen.htwk-leipzig.de/nc/de/fakultaet-bauwesen/personen/name/slowik/ [11] Kolísko, J., Tichý, J., Kalný, M., Huňka, P., Hájek, P. & Trefil, V., Development of ultra-high performance concrete (UHPC) on the basis of raw materials available in the Czech Republic. 

As part of the workpiece materials of will be cut away in the later trimming process, the thickness is only required to be in compliance with that of corresponding part of the trimmed workpiece during quality test.
Since the materials at Point C will be cut away in the later trimming process, Point B will be the final thickening position of components.
According to measurement on the corresponding positions of material object, the minimum thickness at Point A and Point B is 1.926mm and 3.164mm respectively.
However, if original process is adopted in production, the thinning and thickening of workpiece materials can not meet the requirement of production quality test.
International Journal of Mechanical Sciences,Vol.52(2010),P.914 [2] Zhiguo An.