Investigation in all areas - solid, mixed and fluid friction: simulation, toleration, production and coating
Strength tests in time, fatigue and fatigue strength on selected positive and non-positive joints
Interdisciplinary Research between Tribology and Strength Strength Assessment of Joints at Risk of Friction Fatigue Fracture
Synthesis and analysis methods for flexible mechanisms
Strength of Gearing
Experimental, numerical and analytical strength tests of gear teeth
Friction coefficients for force-locked Connections
Investigations of the static/dynamic friction coefficient behaviour with standardized model test methods on laboratory samples
End of the year 2018
Once again an eventful year is drawing to an end for the professorship of Machine Elements and Product Development. A lot of important scientific and industrial projects could be finished and new projects could be acquired in 2018. Furthermore the chair of the professorship was successfully transferred from Prof. Leidich to Prof. Hasse. New exciting fields of research and new colleagues enrich the established research. We are looking forward to the future in excitement.
The Professorship MP wishes everybody peacefully holidays and a good start into the New Year 2019.
Project-accompanying committee in Clausthal-Zellerfeld
On 14th and 15th November the project committee for shaft-hub-connections of the “Forschungsvereinigung Antriebstechnik e. V.” met in Clausthal-Zellerfeld in more and more wintry weather at the foot of the Harz mountains. The Chair of Machine Elements and Product Development was represented by all employees of the Competence Center „Shaft-Hub-Connections“ and presented the current research projects and possible research potentials. The latest findings led to an intensive and profitable discussion with the industry representatives. At the end of the first day, a guided tour of the experimental field at the organizing institute was on the agenda.
New laser microscope provides versatile possibilities in strength and wear research.
The newly acquired laser confocal microscope from Keyence enables high-resolution detection of surfaces down to the nanometer range (5nm) in a short time. The microscope offers two different acquisition modes. The surface can be acquired by conventional light microscopy using focus variation or laser confocal. The laser confocal mode provides even higher quality measurement data for an exact evaluation of surface characteristics. Complex surfaces, which previously took many hours to measure, can now be carried out within a few minutes and deliver higher quality results. The „Tribology“ and „Strength“ research groups thus have a powerful tool at their disposal for researching and assessing surface and material damage.
Growing ecological and economic pressure leads to ever higher and more complex stresses in the development of plain bearings. The research at the institute is therefore primarily concerned with the investigation and development of alternative sliding materials and the influence of geometric deviations. The main focus of the investigations is the wear behaviour under the most varied operating conditions (particles, mixed friction, hydrodynamics).
The permissible loads of selected WNV (tapered and cylindrical interference fit as well as feather key, knurled, polygonal joints, etc.) have been investigated primarily at IKAT for decades in the area of fatigue, fatigue and fatigue strength. The behaviour under individual loads (bending, torsion) as well as combined dynamic loads is analysed.
In contact with various components, deformations in connection with the prevailing joint pressure initiate the damage process of friction fatigue (friction corrosion). Current research activities at the institute focus on basic research on the damage phenomenon of friction corrosion and pursue the objective of developing an impact-compliant calculation method.
While conventional mechanisms owe their deformability to the sliding or rolling interfaces in the joints, flexible mechanisms fulfill their function through elastic stretches in places that are deliberately designed to be flexible during design. This functional principle enables novel, shape-adaptive structures, which can be used, for example, in softrobotics or in variable-shape wings. The professorship focuses its research on optimization-based synthesis methods.
The strength tests focus on the tooth root load-bearing capacity of worm gear units. The challenge to numerical imaging lies in the complex geometry and the special material bronze.
The coefficient of static friction (also: coefficient of friction or coefficient of friction) is to be understood as a system variable with a multitude of influencing parameters. In order to use existing potentials in friction-locking connections (e.g. screw, flange, press-fit connections), an experimental investigation is indispensable. With the help of standardized test methods on model samples, a wide variety of tribological configurations are examined at the research centre with regard to their transmission behavior. A major field of research is the synthesis of new design/selection tools for friction-enhancing measures (e.g. micro/laser structures, hard particles, coatings) for static and dynamic load cases.