University of Twente Student Theses


Improvement of grip and durability of uneven bars

Pekkeriet, D.B. (2017) Improvement of grip and durability of uneven bars.

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Abstract:The bars of the gymnastic apparatus uneven bars wear off fast, leading to less grip and dangerous situations. A literature study was performed on grip, on the effect of magnesium, and on the changes over the past years and the norms set by the International Gymnastics Federation and NEN. A system analysis has been performed to find the specific wear problem and its causes. Experimental research was conducted to understand the underlying mechanisms of wear and grip. A bar was prepared to mimic the abrasive wear and was used in the experiments. Grip was perceived highest when magnesium was used and when the least wear was visible. The coefficient of friction was higher for skin and bar than for leather and bar. Magnesium showed higher coefficients of friction. A programme of requirements has been set in search of a new material. A couple of materials did fulfil the requirements, but were to slippery to use, or could not be tested further. An extra layer of veneer around the bars could give a higher durability. However, during tests the bar showed cracks and wrinkles. Another possibility is a rubber coating. This coating scored some positive feedback from the gymnastics trainers. The coating needs to be tested further on durability.
Item Type:Essay (Master)
Faculty:ET: Engineering Technology
Subject:01 general works, 51 materials science
Programme:Industrial Design Engineering MSc (66955)
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