Pressure simulation and optimization design of functional waist protectors based on a finite-element method

Abstract

Functional waist protectors are commonly used protective devices for physical laborers, exercisers, and people who sit for long periods. The key to their design lies in effectively balancing functionality and comfort. In view of the problems of insufficient protective performance and unbalanced pressure distribution resulting in poor comfort of current functional waist protector products, this study established a biomechanical model of the human waist by using three-dimensional human body modeling and finite-element analysis. Through pressure test experiments and finite-element simulations, the pressure and body surface displacement distribution trends of the human body after wearing five types of experimental waist protectors were obtained. The experimental results show that the structure, material, width of the waist protector, and the curvature radius of the human waist have significant effects on the pressure distribution. Based on the distribution law of pressure and displacement at the waist, the waist protector product was optimized and designed, and the physical waist protector was fabricated. By comparing the distribution relationship of pressure, displacement, and volume shrinkage of the waist after compression on the human waist between the experimental waist protector and the designed waist protector, it was found that the designed waist protector has a relatively significant improvement in the support for the waist, the comfort of wearing for the human body and the fit with the human waist. This research provides theoretical support and practical basis for the optimal design of functional waist protector.

Keywords

Waist protector finite element clothing pressure displacement volumetric shrinkage optimal design

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References

Ferreira

De Luca

Haile

, et al. Global, regional, and national burden of low back pain, 1990–2020, its attributable risk factors, and projections to 2050: a systematic analysis of the Global Burden of Disease Study 2021. Lancet Rheumatol 2023; 5(6): e316–e329.

Whitlock

Diaz-Ramirez

Glymour

, et al. Association between persistent pain and memory decline and dementia in a longitudinal cohort of elders. JAMA Intern Med 2017; 177(8): 1146–1153.

Knezevic

Candido

Johan

WSV

, et al. Low back pain. Lancet 2021; 389(10294): 78–92.

Ludvig

Preuss

Larivière

The effect of extensible and non-extensible lumbar belts on trunk muscle activity and lumbar stiffness in subjects with and without low-back pain. Clin Biomech 2019; 67: 45–51.

Research and development of smart clothing for waist sports injury protection. J

Text Res 2020; 41(2): 119–124.

Xiao

Research on wearable product design based on weightlifting training. Thesis, Beijing Institute of Technology, 2018.

Jiang

Graphene far-infrared intelligent physical therapy waist protector (knee protector) patch with acupuncture for chronic low back pain. Chin Acupunct Moxibust Electron J 2019, 8(03): 122–124.

Yang

Liu

, et al. A new type of EMS intelligent waist circumference in the rehabilitation of lumbar and abdominal muscle injury. Med Diet Health 2021; 19(7): 223–224.

Rodriguez

Rabuñal

Pazos

, et al. Wearable postural control system for low back pain therapy. IEEE Trans Instrum Meas 2021; 70: 1–10.

10.

Oleiwi

Shah

SZA

Bilal

, et al. Efficacy of orthotic support in mitigating low back pain and disability in low back pain sufferers. J Back Musculoskel Rehab 2023; 36(5): 1111–1125.

11.

Lotz

Agnew

Godwin

, et al. The effect of an on-body personal lift assist device (PLAD) on fatigue during a repetitive lifting task. J Electromyogr Kinesiol 2009; 19(2): 331–340.

12.

Makabe

Momota

Mitsuno

, et al. A study of clothing pressure developed by the girdle. J Japan Res Assoc Text End-Uses 1991; 32: 424–438.

13.

Bonnaire

Molimard

Calmels

, et al. Biomechanical analysis and modelling of lumbar belt: preliminary study. Comput Meth Biomech Biomed Eng 2013; 16: 219–221.

14.

Dan

Zheng

Liu

, et al. Study on the functional relationship between pressure and displacement with time for waist of elastic legwear using FEM. Int J Cloth Sci Technol 2023; 35(5): 754–765.

15.

Dan

Liu

Shi

Functional relationship among pressure, displacement and angle for the waist of elastic pantyhose using finite element simulation. Text Res J 2023; 93(9–10): 2103–2112.

16.

Dan

Shi

Finite element simulation on the relationship between pressure and displacement for the waist of elastic pantyhose. Int J Cloth Sci Technol 2021; 33(2): 289–301.

17.

Dan

Shi

Numerical simulation of the area shrinkage mass for the waist of elastic pantyhose by using FEM. Int J Cloth Sci Technol 2020; 32(2): 244–254.

18.

China Institute of Standardization and Information Classification. GB10000-2023. Body size for Chinese adults. Beijing: State Administration of Technical Supervision, 2023.

19.

Leong

, and Gu

YD.

Construction and finite element analysis of a coupled finite element model of foot and barefoot running footwear. Proc IMechE P J Sports Eng Technol 2019; 233(1): 101–109.

20.

Quan

Zhang

Qin

, et al. CT image-based establishment and verification of three-dimensional finite element biomechanical model for osteoporotic thoracolumbar compression fracture after percutaneous kyphoplasty. Chin J Med Phys 2021; 38(3): 360–369.

21.

Finite element analysis of knee joint biomechanics of single-leg landing movements of overhead ball in female badminton players. PhD Thesis, Shanghai Institute of Physical Education, 2020.

22.

Xiao

Xin

Kuan

, et al. Finite analysis of stability between modified articular fusion technique, posterior lumbar interbody fusion and posteriorlateral lumbar fusion. BMC Musculoskel Disord 2021; 22(1): 1015.

23.

Guo

Zhang

Development and validation of a whole human body finite element model with detailed lumbar spine. World Neurosurg 2022; 163: e579–e592.

24.

Yan

Shi

, et al. Finite element simulation of knee joint pressure and surface displacement: relationship and influencing factors. J Text Inst 2024. DOI: 10.1080/00405000.2024.2426831

25.

Yan

Shi

, et al. Finite-element simulation of functional knee sleeves based on three-dimensional modeling of the knee joint. Text Res J 2024. DOI: 10.1177/00405175241277020

26.

Agarwal

Juneja

The effectiveness of compression garment in relieving muscular pain: a review. Int J Cloth Sci Technol 2023; 35(4): 557–564.

27.

Dan

Shi

Dynamic simulation of the relationship between pressure and displacement for the waist of elastic pantyhose in the walking process using the finite element method. Text Res J 2021; 91(13-14): 1497–1508.