Investigating the impact behavior of wrestling mats via finite element simulation and falling weight impact tests

Tomin, Márton; Kossa, Attila; Berezvai, Szabolcs; Kmetty, Ákos

doi:10.1016/j.polymertesting.2022.107521

Cited by 7 publications

(2 citation statements)

References 35 publications

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“…As shown in Figure a, the rebound height of PVC + TPU foam was 171.3 mm, and it was 223.4 mm for the TPU foam, which indicated that the PVC + TPU foam had superior energy dissipation ability during the impact. Using the iteration idea of literature for damping parameters α 1 (Figure S5). The damping ratio was iterated until the rebound height in the simulation matched the measured heights.…”

Section: Resultsmentioning

confidence: 99%

“…Consequently, only parameter α 1 is investigated and α 0 is set to zero as it is related to the damping forces associated with translation through a viscous medium. The viscoelastic behavior of the foam material is nonlinear; therefore, parameter α 1 depends on the deformation Figure f shows the case of the PVC + TPU foam composite foam which is expected that the rigid PVC plate could redistribute the impact energy to a wider region of the TPU foam.…”

Section: Experiments and Methodsmentioning

confidence: 99%

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Impact Protective Performance and Theoretical Analysis of Polyvinyl Chloride/Thermoplastic Polyurethane Foam Composite Structure via Finite Element Simulation

Tian,

Li,

Qin

et al. 2024

Ind. Eng. Chem. Res.

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Polymer foams are widely used as cushioning and impact protective materials, while the single foam is susceptible to densification by concentrating pressure at the point of impact, thus reducing the protection effect. Herein, inspired by the tortoise shell, a composite structure composed of a poly(vinyl chloride) (PVC) hard layer and a thermoplastic polyurethane (TPU) foam soft layer was developed, which demonstrated significantly enhanced impact protection and energy absorption performance. The numerical model and finite element model were developed by adopting the Storakers model and the Rayleigh damping model to represent the hyperelastic behavior and energy dissipation of the elastic foam. Macroscopic and mesoscopic theoretical analyses revealed the mechanism of excellent cushioning and protection performance. The model is also capable of simulating the effects of the foam thickness, the modulus of the rigid plate, and the free-falling sphere on the cushioning performance. Therefore, this work provides a rational design of the buffering material and a numerical model that is capable of directing the material selection, design, and optimization of the composite material configuration depending on the requirements of different impact protection situations.

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Section: Resultsmentioning

confidence: 99%

Section: Experiments and Methodsmentioning

confidence: 99%

Impact Protective Performance and Theoretical Analysis of Polyvinyl Chloride/Thermoplastic Polyurethane Foam Composite Structure via Finite Element Simulation

Tian,

Li,

Qin

et al. 2024

Ind. Eng. Chem. Res.

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A System Identification Approach for Nondestructive Characterization of Sport Surfaces

Genovese,

Tordela

2024

Mechanisms and Machine Science

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Accounting for friction in the mechanical testing of athletics tracks

Andena,

Gobbi,

Meda

et al. 2024

Sports Eng

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This investigation deals with the problem of identifying the mechanical behaviour of rubbers from compression tests, performed on specimens having unfavorable geometry. A typical situation is that of flat specimens obtained from high-friction sports surfaces. To this purpose, experimental tests were conducted, aimed at measuring friction under various conditions and evaluating its effect on the compressive behavior of different rubber samples. The experimental results have been interpreted in view of an existing analytical model proposed by Gent and coworkers. The method was shown to be valid within a relatively broad range of conditions (in terms of materials, lubrication and aspect ratio). Its application allowed the creation of virtual “frictionless” curves, by rescaling experimental data for the stiffening factor predicted by Gent model. These curves represent more closely the intrinsic material behaviour, removing the large frictional contribution present in the experimental tests, and can be used as a more reliable input for numerical simulations.

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Investigating the impact behavior of wrestling mats via finite element simulation and falling weight impact tests

Cited by 7 publications

References 35 publications

Impact Protective Performance and Theoretical Analysis of Polyvinyl Chloride/Thermoplastic Polyurethane Foam Composite Structure via Finite Element Simulation

Impact Protective Performance and Theoretical Analysis of Polyvinyl Chloride/Thermoplastic Polyurethane Foam Composite Structure via Finite Element Simulation

A System Identification Approach for Nondestructive Characterization of Sport Surfaces

Accounting for friction in the mechanical testing of athletics tracks

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