دانلود رایگان مقاله لاتین تحلیل مفاصل نقطه جوش ورق فولادی از سایت الزویر
عنوان فارسی مقاله:
تجزیه و تحلیل مفاصل نقطه جوش ورق های فولادی با مشخصات بسته به روش مافوق صوت
عنوان انگلیسی مقاله:
The analysis of spot welding joints of steel sheets with closed profile by ultrasonic method
سال انتشار : 2015
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مقدمه انگلیسی مقاله:
1. Introduction
Resistance spot welding is an efficient joining process widely used in the fabrication of the auto-body assemblies. These connections [9] made on a steel scaffolding maintain adequate stiffness of the structure during fatigue loads (during the operation of the vehicle) or in critical conditions during a collision or a traffic accident [5]. Typically, the joined elements are steel sheets of the same or similar thickness (from 0.7 to 2 mm). In addition to steel sheets, aluminium body panels are also subjected to resistance spot welding, which requires the application of suitable equipment (electrodes with specified geometry) and maintenance of required welding parameters [4,16]. Resistance spot welding is so widely used in the automotive industry, because it has excellent techno-economic benefits including, among others, the high suitability for automation, which shortens the process duration [1] and relatively low cost of production, especially high volume. Gedeon and Eagar [8] described the mechanism of developing a nugget of a single weld, whose proper shape and strength significantly affects the quality of the entire vehicle body. Raoelison et al. [17] found that the quality of the spot weld is a function of the weld nugget size formed as a result of current flow and pressure of the welder’s electrode. In addition, Kang et al. [11], Wang and Barkey [23] focused on the fatigue life of spot welds subjected to different loads. For many years, research is being carried out on the causes and methods of detecting and ways of preventing defects that may occur in the spot-welded joints [20]. Lee et al. [13] described a system based on neural networks and fuzzy logic, which is intended to monitor the manufacturing stage of spot-welded joint. In addition, in the 60’s of the last century ultrasonic method was used to examine the spot-welded joints in various industries and it is used up to date [3,6,12]. Apart from the statistical evaluation, it allows for a thorough verification of developed joints carried out on the basis of destructive testing and measuring the diameter of the
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کلمات کلیدی:
Ultrasonic metal sheet thickness measurement without prior wave ... iopscience.iop.org/article/10.1088/0022-3727/46/44/445502 by S Dixon - 2013 - Cited by 10 - Related articles Oct 17, 2013 - Ultrasonic metal sheet thickness measurement without prior wave .... spatial profile, the total system response is the function squared, also ... [PDF]Handbook on the Ultrasonic Examination of Austenitic Clad Steel ... www.bookshop.europa.eu/...ultrasonic...steel.../CLNA15786ENC_001.pdf?... 4.3 Overview of Inspection Techniques. 30. 4.4 Equipment. 33 ... (PISC = Programme for the Inspection of Steel Components). The working group ... ing and improving ultrasonic techniques used by industry for testing materials. .... close to the interface. ... of which begin by laying sheets of cladding on slabs of base metal ... [PDF]Manual ultrasonic inspection of thin metal welds - BiNDT www.bindt.org/downloads/ndt2012_1a2.pdf by C Carpentier - Related articles case where ultrasonic methods have been developed for a thin wall has been ... The test samples specified consisted of plates 3, 4 and 5mm thick in ferritic and ... 20 to 30mm and enabled the probe index point to be close to the weld cap and hence .... and compare beam profile between the conventional and phased array ... [PDF]ULTRASONIC DEFECT-SIZING USING DECIBEL DROP METHODS ... www.iaea.org/inis/collection/NCLCollectionStore/_Public/21/020/21020132.pdf by RV Murphy - 1987 - Cited by 1 - Related articles drop technique in sizing defects using beam axial and beam profile methods at several dB ..... Two hemi-elliptical saw cuts in the weld of a 15.5 mm steel plate. Nondestructive Characterization of Materials: Proceedings of the 3rd ... https://books.google.com/books?isbn=3642840035 Paul Höller, Viktor Hauk, G. Dobmann - 2012 - Technology & Engineering Lankford Coefficient Evaluation in Steel Sheets by an Ultrasonic Method ... rolled ferritic steel sheets. Fig. 1: Comparison of the 9-profiles of the (200)-reflection in. Most Downloaded Case Studies in Nondestructive Testing and ... https://www.journals.elsevier.com/case-studies-in...and.../most-downloaded-articles Comparison of different additive manufacturing methods using computed ... of spot welding joints of steel sheets with closed profile by ultrasonic method. Nondestructive Methods for Material Property Determination https://books.google.com/books?isbn=1468447696 C.O. Ruud, R.E. Jr. Green - 2012 - Technology & Engineering The acoustoelastic data on hot-rolled sheet appeared to have a random ... Recent theoretical work has clarified how ultrasonic velocity is influenced in polycrystalline steel or ... Most sheets produced velocity profiles which exhibited 2-fold ... Searches related to steel sheets with closed profile by ultrasonic method nugget test in spot welding spot weld nugget diameter formula spot welding process advantages of spot welding spot welding parameters spot welding pdf
