Pneumatic LDPE Shock Absorbers for the Protection of the Human Head Against Impact
1
Institute of Applied Mechanics, Poznan University of Technology,
ul.Jana Pawla II 24, 60-965 Poznan, Poland
Publication date: 2026-03-11
Acta Mechanica et Automatica 2026;20(1)
KEYWORDS
ABSTRACT
The problem of protecting the head from mechanical impact injuries has been known since ancient times. Currently, there is a great deal of interest in individual means of transport such as traditional and electric bicycles, electric scooters, segways, etc. The rise in popularity of electric scooters is particularly evident in urban and suburban areas. The specialist literature provides information on accidents involving users of individual means of transport, including users of relatively new electric scooters. The literature also con-tains several studies on head protection for people who need to use personal protective equipment, such as industrial safety hel-mets. Despite the ever-increasing number of new technical solutions used in the production of protective helmets in the broad sense, the problem of effective protection against the risk of head injury in an accident remains relevant. The article presents the results of impact tests on pneumatic shock absorbers made of LDPE, which provide conceptual protection for the head and possi-bly other parts of the body or fragile objects against the effects of impact loads. The absorbers presented can also be used in several different safety features, e.g., car headliners. The mechanical properties of the LDPE absorbers were compared with those of the EPS100 polystyrene, which is used in popular bicycle and motorcycle helmets as an impact energy dissipating element. The research methodology can be an interesting proposition for researchers dealing with the issues of impacts and diagnostics of ma-terials and structures that dissipate impact energy. LDPE pneumatic absorbers, while maintaining controlled air flow, are a viable al-ternative to EPS100 polystyrene foam. The research carried out, using analytical relationships, allowed the following objectives to be achieved: (1) experimental tests of impact absorbers, (2) processing the results by using approximation functions,
(3) preparation of dynamic characteristics, and (4) evaluation of the protective effectiveness of pneumatic and polystyrene absorb-ers.
REFERENCES (33)
1.
Verschueren P. Biomechanical analysis of head injuries related to bicycle accidents and a new bicycle helmet concept. B-3001 Heverlee (Leuven), Belgium: Katholieke Universiteit Leuven Faculteit Ingenieurswetenschappen Arenbergkasteel; 2009. (D/2009/7515/76).
2.
Zhou Z, Jiang B, Cao L, Zhu F, Mao H, Yang KH. Numerical simulations of the 10-year-old head response in drop impacts and compression tests. Computer Methods and Programs in Bi-omedicine. 2016;131:13–25.
3.
Li S, Xiao Z, Zhang Y, Li QM. Impact analysis of a honeycomb-filled motorcycle helmet based on coupled head-helmet model-ling. International Journal of Mechanical Sciences. 2021 Jun;199:106406.
4.
Li S, Li QM. Head responses subjected to frontal translational acceleration loads. International Journal of Mechanical Sciences. 2022;231:107598.
5.
Verschueren P, Delye H, Depreitere B, Van Lierde C, Haex B, Berckmans D, et al. A new test set-up for skull fracture character-isation. Journal of Biomechanics. 2007;40(15):3389–96.
6.
Deck C, Bourdet N, Meyer F, Willinger R. Protection performance of bicycle helmets. Journal of Safety Research. 2019 Dec;71:67–77.
7.
Wang F, Wu J, Hu L, Yu C, Wang B, Huang X, et al. Evaluation of the head protection effectiveness of cyclist helmets using full-scale computational biomechanics modelling of cycling accidents. Journal of Safety Research. 2022;80:109–34.
8.
Monea AG, Van Der Perre G, Baeck K, Delye H, Verschueren P, Forausebergher E, et al. The relation between mechanical impact parameters and most frequent bicycle related head injuries. Journal of the Mechanical Behavior of Biomedical Materials. 2014;33:3–15.
9.
Li S, Li QM, Tse KM, Pang T. Functionally graded foam materials for head impact protection. Thin-Walled Structures. 2024;203:112193.
10.
Spinelli DJ, Plaisted TA, Wetzel ED. Adaptive head impact pro-tection via a rate-activated helmet suspension. Materials & De-sign. 2018;154:153–69.
11.
Sahoo D, Deck C, Yoganandan N, Willinger R. Development of skull fracture criterion based on real-world head trauma simula-tions using finite element head model. Journal of the Mechanical Behavior of Biomedical Materials. 2016;57:24–41.
12.
Obst M, Kurpisz D, Jakubowski M. Experimental and Analytical Approaches on Air Spring Absorbers Made of LDPE Polymer. Ac-ta Mechanica et Automatica. 2024;18(2):314–22.
13.
Obst M, Rzepczyk S, Głowiński S, Żaba C. Motorbike protective helmets, construction, testing and its influence on the type and severity of injuries of motorbike accident casualties: a literature review; 2023. Available from: https://sin.put.poznan.pl/publ....
14.
Mosleh Y, Vander Sloten J, Depreitere B, Ivens J. Novel Compo-site Foam Concept for Head Protection in Oblique Impacts. Adv Eng Mater. 2017;19(10):1700059.
15.
Yazıcı M, Can Y, Güçlü H. Investigation of the Hyperelastic Material Coated Steel Car Hood Concerning Pedestrian Head Impact Protection using Finite Element Method. Acta Phys Pol A. 2018;134(1):238–40.
16.
Varela MM, Fernandes FAO, Alves De Sousa RJ. Development of an Eco-Friendly Head Impact Protection Device. Applied Sci-ences. 2020;10(7):2492.
17.
Catena AM, Treglia M, Marsella LT, Locatelli M, Rosato E, Kabir A, et al. When the Helmet Is Not Enough: Forensic Multidiscipli-nary Reconstruction of a Deadly Motorcycle Accident. Diagnos-tics. 2022;12(10):2465.
18.
Meng S. Towards improved motorcycle helmet test methods for head impact protection: Using experimental and numerical meth-ods. KTH Royal Institute of Technology; 2019; 50 p.
19.
Li X, Sandler H, Kleiven S. The importance of nonlinear tissue modelling in finite element simulations of infant head impacts. Biomech Model Mechanobiol. 2017;16(3):823–40.
20.
Tomita S, Shimanuki K, Oyama S, Nishigaki H, Nakagawa T, Tsutsui M, et al. Transition of deformation modes from bending to auxetic compression in origami-based metamaterials for head protection from impact. Sci Rep. 2023;13(1):12221.
21.
Stark NEP, Begonia M, Viano L, Rowson S. The Influence of Headform Friction and Inertial Properties on Oblique Impact Hel-met Testing. Ann Biomed Eng. 2024;52(10):2803–11.
22.
Sahoo D, Deck C, Yoganandan N, Willinger R. Influence of stiffness and shape of contact surface on skull fractures and biomechanical metrics of the human head of different population underlateral impacts. Accident Analysis & Prevention. 2015;80:97–105.
23.
Yoganandan N, Zhang J, Pintar FA. Force and Acceleration Corridors from Lateral Head Impact. Traffic Injury Prevention. 2004;5(4):368–73.
24.
Trotta A, Ní Annaidh A, Burek RO, Pelgrims B, Ivens J. Evalua-tion of the head-helmet sliding properties in an impact test. Jour-nal of Biomechanics. 2018;75:28–34.
25.
Obst M. Evaluating the Static and Dynamic Impact Properties of LDPE Film: Insights into Mechanical Energy Consumption. Acta Mechanica et Automatica. 2025;19(2):258–67.
26.
Zheng Z, Qiu H, Wang Z, Luo S, Lei Y. Data fusion based multi-rate Kalman filtering with unknown input for on-line estimation of dynamic displacements. Measurement. 2019;131:211–8.
27.
Smyth A, Wu M. Multi-rate Kalman filtering for the data fusion of displacement and acceleration response measurements in dy-namic system monitoring. Mechanical Systems and Signal Pro-cessing. 2007;21(2):706–23.
28.
Impraimakis M, Smyth AW. A new residual-based Kalman filter for real time input–parameter–state estimation using limited output information. Mechanical Systems and Signal Processing. 2022;178:109284.
29.
Sbriglio C, Ptak M, Kwiatkowski A. Advances in Computational Modelling of Head Injury Biomechanics – a Comprehensive Re-view. Arch Computat Methods Eng [Internet]; 2025.
30.
Ptak M, Kaczynski P, Fernandes FAO, De Sousa RJA. Assessing impact velocity and temperature effects on crashworthiness properties of cork material. International Journal of Impact Engi-neering. 2017;106:238–48.
31.
Curnow WJ. Bicycle helmets: Lack of efficacy against brain injury. Accident Analysis & Prevention. 2006;38(5):833–4.
32.
Wilhelm J, Ptak M, Fernandes FAO, Kubicki K, Kwiatkowski A, Ratajczak M, et al. Injury Biomechanics of a Child’s Head: Prob-lems, Challenges and Possibilities with a New aHEAD Finite Ele-ment Model. Applied Sciences. 2020;10(13):4467.
33.
Fernandes FAO, Alves De Sousa RJ. Motorcycle helmets-A state of the art review. Accident Analysis&Prevention. 2013;56:1–21.
| eISSN: | 2300-5319 |
| ISSN: | 1898-4088 |
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