Boosting Energy Return Using 3D Printed Midsoles Designed With Compliant Constant Force MechanismsSource: Journal of Mechanical Design:;2023:;volume( 146 ):;issue: 006::page 62001-1DOI: 10.1115/1.4064164Publisher: The American Society of Mechanical Engineers (ASME)
Abstract: The enhancement of midsole compressive energy return is associated with improved running economy. Traditional midsole materials such as ethylene vinyl acetate (EVA), thermoplastic polyurethane (TPU), and polyether block amide (PEBA) foams typically exhibit hardening force–displacement characteristics. On the other hand, a midsole with softening properties, which can be achieved through compliant constant force mechanisms (CFMs), can provide significant benefits in terms of energy storage and return. This study presents the development of such a midsole, incorporating 3D printed TPU CFM designs derived through structural optimization. The mechanical properties under cyclic loading were evaluated and compared with those of commercially available running shoes with state-of-the-art PEBA foam midsoles, specifically the Nike ZoomX Vaporfly Next% 2 (NVP). Our custom midsole demonstrated promising mechanical performance. At similar deformation levels, the new design increased energy storage by 58.1% and energy return by 47.0%, while reducing the peak compressive force by 24.3%. As per our understanding, this is the first study to prove that the inclusion of CFMs in the structural design of 3D printed midsoles can significantly enhance energy return.
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contributor author | Ou, Haihua | |
contributor author | Johnson, Shane | |
date accessioned | 2024-04-24T22:41:37Z | |
date available | 2024-04-24T22:41:37Z | |
date copyright | 12/22/2023 12:00:00 AM | |
date issued | 2023 | |
identifier issn | 1050-0472 | |
identifier other | md_146_6_062001.pdf | |
identifier uri | http://yetl.yabesh.ir/yetl1/handle/yetl/4295695 | |
description abstract | The enhancement of midsole compressive energy return is associated with improved running economy. Traditional midsole materials such as ethylene vinyl acetate (EVA), thermoplastic polyurethane (TPU), and polyether block amide (PEBA) foams typically exhibit hardening force–displacement characteristics. On the other hand, a midsole with softening properties, which can be achieved through compliant constant force mechanisms (CFMs), can provide significant benefits in terms of energy storage and return. This study presents the development of such a midsole, incorporating 3D printed TPU CFM designs derived through structural optimization. The mechanical properties under cyclic loading were evaluated and compared with those of commercially available running shoes with state-of-the-art PEBA foam midsoles, specifically the Nike ZoomX Vaporfly Next% 2 (NVP). Our custom midsole demonstrated promising mechanical performance. At similar deformation levels, the new design increased energy storage by 58.1% and energy return by 47.0%, while reducing the peak compressive force by 24.3%. As per our understanding, this is the first study to prove that the inclusion of CFMs in the structural design of 3D printed midsoles can significantly enhance energy return. | |
publisher | The American Society of Mechanical Engineers (ASME) | |
title | Boosting Energy Return Using 3D Printed Midsoles Designed With Compliant Constant Force Mechanisms | |
type | Journal Paper | |
journal volume | 146 | |
journal issue | 6 | |
journal title | Journal of Mechanical Design | |
identifier doi | 10.1115/1.4064164 | |
journal fristpage | 62001-1 | |
journal lastpage | 62001-8 | |
page | 8 | |
tree | Journal of Mechanical Design:;2023:;volume( 146 ):;issue: 006 | |
contenttype | Fulltext |