Table Tennis Ball Impacting Racket Polymeric Coatings: Experiments and Modeling of Key Performance Metrics

Abstract

The performance of a table tennis racket is often associated with subjective or quantitative criteria such as the adhesion, the control and the speed. Overall, the so-called performance aims at characterizing the impact with the ball. Ultimately, the polymeric layers glued onto the wooden blade play a key role, as evidenced in a previous work where the normal linear (no spin) impact of a ball onto polymeric layers was experimentally and numerically investigated. In this work, more realistic loading conditions leading to varying the incident angle and spin of the ball, were explored. While the sole linear restitution coefficient was determined in the anterior normal impact study, new physical metrics were identified to describe fully the trajectory of the reflected ball after impact. A companion 3D finite elements model was developed where the polymeric time-dependent dissipative compliant behavior measured with dynamic mechanical analysis and compression tests was accounted for. The confrontations with the experimental data highlighted the key role of the polymer intrinsic properties along with the friction coefficient between the ball and the polymer external layer.

Pengaruh Ketebalan Karet Pemukul (Bet) Tenis Meja Terhadap Tumbukan Bola

“…Penelitian pantulan bola di bet tenis meja telah dilakukan untuk kinerja pergelangan berdasarkan empat jenis pegangan bet (S. Chen, 2013), campuran bahan karet yaitu rasio campuran karet styrene butadiene dan karet alam (natural rubber) (Wei-bing et al, 2014), analisis getaran dan akustik untuk prototipe bilah raket dengan perbedaan ketebalan lapisan (Manina et al, 2014), fenomena fisik juggling (Widenhorn, 2016), sifat mekanis karet bet dari material nano yang diperkuat (Y.-F. Chen et al, 2016), analisis karakteristik dan efek pada kecepatan bola smash menggunakan tiga jenis karet pemukul tenis meja , penggunaan fiber alami untuk bahan bilah (Arifin et al, 2017) dan impak bola terhadap raket yang dilapisi polimer (Rinaldi et al, 2019).…”

“…Performa bet tenis meja sering dikaitkan dengan kriteria subyektif atau kuantitatif seperti adhesi, kontrol, dan kecepatan. Secara keseluruhan, performa yang disebut bertujuan untuk mengkarakterisasi tumbukan dengan bola (Rinaldi et al, 2019). Fenomena tumbukan ini merupakan efek pemukul terhadap bola sebagai fungsi proses dari dua gaya yaitu gaya impak yang tegak lurus terhadap permukaan pemukul dan gaya gesek dengan arah tangensial terhadap permukaan pemukul (Chang, 2013).…”

Lignocellulosic Composites from Acetylated Sunflower Stalks

“…Worldwide economic development has caused increased needs for converted wood products [1][2][3][4][5][6]. A big challenge in the composites industry is the availability of cheaper materials in order to minimize the production cost.…”

Sports Materials Special Issue Editorial

“…Moving from hand-held equipment to ball dynamics, Lane and colleagues [7] measured strains in tennis ball cores during impacts with a rigid surface, using three-dimensional digital image correlation. Knowledge of the strains experienced by sports equipment during use can inform material characterisation and finite element modelling strategies, with implications for product development and selection.The first article in the issue utilising finite element modeling is from Rinaldi and colleagues [8], and covers the oblique impact of a table tennis ball on the polymeric layers that are applied to the faces of wooden bats. Sports engineering is not always about product development and the latest innovations, with regulators often more concerned with maintaining tradition and ensuring fair and safe play.…”

“…The first article in the issue utilising finite element modeling is from Rinaldi and colleagues [8], and covers the oblique impact of a table tennis ball on the polymeric layers that are applied to the faces of wooden bats. Sports engineering is not always about product development and the latest innovations, with regulators often more concerned with maintaining tradition and ensuring fair and safe play.…”