Drawing of square section rod from round bar can be done with two die shapes. In the first die shape, deformation starts from corners of the square and in second die shape, deformation starts from sides of square. This article has compared the drawing force for both die shapes and as a result optimum die shape was determined. Due to complexity of metal flow inside the die, analyzing of actual p...

A lot of research made during these last 15 years showed that the quantification of the springback has a significant role in the industry of sheet metal forming. These studies were made with the objective of finding techniques and methods to minimize or completely avoid this permanent physical variation. Moreover, the use of steel and aluminum alloys in the car industry and aviation poses every...

Nach einer Einleitung und Diskussion tiber die Eingen­schaften der diabetischen Krankheiten wurde ausflihrlich trber die Aetiologie und Pathophysiologie der Zuckeran­kheiten,insbesondere der Altersdiabetis,gesprochen.Nach der symptomalogie der Diabetis haben wir die ncueste Einteilung der Zuckerkrankheiten genannt und die Untc­rsuchungsmethoden,die heute Uhlich sind,erwahnt;dazu wurden unsere M...

Let G be a graph of order n. For i = 1,2,... , n, let di the degree vertex vi G. The Sombor matrix Aso is defined so that its (i, j)-entry equal to ?d2i + d2j if vertices and vj are adjacent, 0 otherwise. spectral radius ?1 energy Eso examined. In particular, upper bounds on obtained, as well Nordhaus-Gaddum-type results for Eso.

Because of the energy load imbalance of cluster nodes in wireless sensor networks, this causes cluster heads tend to die earlier in the case of more tasks and routing problem such as larger energy loss, so an adaptive energy optimization clustering routing algorithm is proposed. The node residual energy and distance are taken into full consideration by the measure coefficient on the cluster-hea...

Due to limitations of finite element methods and software packages, existing in incorporating the imperfections in to the model. The parametric study of BHF, sheet thickness, die profile radius, punch profile radius, initial yield stress and sheet anisotropy and including imperfections is carried out by the model developed by Ravindra.K.Saxena [1, 2, 3]. The mathematical model is studied and va...

The spectral closeness of a graph G is defined as the radius matrix , whose ( u v )-entry for vertex and 2 − d u,v ) if ≠ 0 otherwise, where distance between in . residual nontrivial minimum subgraphs with one deleted. We propose local grafting operations that decrease or increase determine those graphs uniquely minimize and/or maximize some families graphs. also discuss extremal properties clo...

To improve the manufacturing efficiency of ceramic MOX fuels, wet processes, such as extrusion, are studied a novel production method. The flowing behavior, is essential to obtain smooth and defectless rods. This work provides study on rheological properties paste assesses possibility produce nuclear fuel by extrusion. Surrogate powders UO2 PuO2 were used, respectively TiO2 Y2O3. A with 40.9%vo...

The strength of high-power light emitting diode (LED) dies, cut from wafers with a laser, has to be determined for the need of design and quality control in order to assure the good reliability of packages in manufacturing and service. The objective of this study is to determine the strength of high-power LED die with a size of 1 1 0.1 mm by point-load test (PLT) and line-load test (LLT) associ...