Search results for: C. Bonk

Items from 1 to 7 out of 7 results

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Modeling of the ductile damage – Application for bar shearing

S. Moakhar, H. Hentati, M. Barkallah, J. Louati, more

Materialwissenschaft und Werkstofftechnik > 50 > 11 > 1353 - 1363

The finite element method is becoming a reliable tool for designing manufacturing processes. Even in bar shearing, which is a basic operation in the metalworking industry, the finite element method is increasingly employed for the optimization of the process. Ductile damage modeling is crucial thereby. Recent experimental investigations have shown that, in particular, triaxiality and temperature must...

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Numerical Investigation of the Oxide Scale Deformation Behaviour with Consideration of Carbon Content during Hot Forging

B.-A. Behrens, R. Kawalla, B. Awiszus, A. Bouguecha, more

Procedia Engineering > 2017 > 207 > C > 526-531

Due to increasing product requirements the numerical simulation has become a powerful tool for the effective and efficient design of individual process steps as well as entire process chains. In order to model hot forging processes with finite element based numerical methods realistic models are required which consider the detailed mathematical description of the material behaviour during the forging...

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Creating load-adapted mechanical joints between tubes and sheets by controlling the material flow under plastically unstable tube upsetting

A. Sviridov, M. Rusch, A. Almohallami, C. Bonk, more

Procedia Engineering > 2017 > 207 > C > 968-973

Mechanical joining processes provide various advantages over conventional fusion welding of metallic components such as shorter cycle times, little or no heat input and reduced need for subsequent surface finishing operations. Several investigations in the past have shown that joints between tubes and sheets or plates can be manufactured by upsetting operations. Under axial compression, the tube develops...

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Experimental investigations on the transformation-induced plasticity in a high tensile steel under varying thermo-mechanical loading

B. -A. Behrens, A. Bouguecha, C. Bonk, A. Chugreev

Computer Methods in Materials Science > 2017 > Vol. 17, No. 1 > 36--43

Transformation-induced plasticity (TRIP) also known as transformation plasticity (TP) occurs during solid state phase transformation in the case of applied stress and may lead to irreversible macroscopic distortions in steel components after heat treatment. Particularly, in the context of cost-efficient hot forging, where heat treatment is integrated in the process chain, various complex stress states...

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Rifampin-Impregnated Silicone Catheters: A Potential Tool for Prevention and Treatment of CSF Shunt Infections

J.A. Hampl, A. Weitzel, C. Bonk, W. Kohnen, more

Infection > 2003 > 31 > 2 > 109-111

Background: Infection continues to be one of the major complications of cerebro-spinal fluid shunting procedures. Recent insights in the pathophysiological mechanism of these foreign body infections have elucidated the difficulty of achieving successful treatment without device removal. The development of a rifampin-impregnated silicone catheter yielded excellent results in infection prevention and...