Assessment of ergonomically designed handle shapes for low-frequency vibration responses

Tony, B. Jain A. R.; Alphin, M. S.

doi:10.1177/1464420718766961

Cited by 5 publications

(3 citation statements)

References 25 publications

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“…After 200 Hz, the values of all the coated palms are almost equal. The analytical study results were in good agreement with the experimental study conducted by Tony et al [16]. The change in magnitude of transmissibility with frequency in y-direction for Coated and uncoated palms is shown in Fig.…”

Section: Resultssupporting

confidence: 89%

An analytical study – dynamic behavior of the human hand to hold mechanical handle with and without coating

Tony¹,

Santha²

2018

Vib. proced.

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The primary objective of the study is analytically predicting the anti-vibration coating on the handles and to evaluate the vibration isolation effectiveness. The ISO 10068:2012 two-point driving human physical models are coated with Foam-A material, Foam-B material, and Gel material. The coated ISO models are applied to predict the effectiveness of three different anti-vibrations coating in terms of vibration transmitted to the finger, palm, and the shoulder. The results are obtained as a vibration transmissibility magnitude in the three orthogonal directions (, ,) and the results are also compared with uncoated models. A significant level of vibration reductions was found. The proposed model may also be useful for further analysis of anti-vibration coating materials and help designers to develop better handles for vibrating tools.

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Section: Resultssupporting

confidence: 89%

An analytical study – dynamic behavior of the human hand to hold mechanical handle with and without coating

Tony¹,

Santha²

2018

Vib. proced.

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“…Previous studies had mostly investigated upper limb MSDs among the subject who usually performs everyday manual operations in awkward posture with physically powerful efforts and repetitive movements of hand and wrist 24) . It has also been evidently presented in the literatures that an ergonomically designed hand tools can decrease the vibration magnitudes notably 25,26) .…”

Section: Resultsmentioning

confidence: 94%

An Investigation of Ergonomic Risk for Work-Related Musculoskeletal Disorders with Hand-Held Drilling

Sharma¹,

Sain²,

Meena³

et al. 2023

Evergreen

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Woodworkers commonly perform operations like sawing, chipping, planning, shaping, nailing and drilling in daily work environment. This study focused the consequences of exposure to hand arm vibration among woodworkers working with handheld drill machine. Subjects' hand grip strength was measured by a digital hand grip dynamometer. The vibration generated by a handheld drill machine was the main concern and hence the same handheld drill machine was used during this study. The results showed that workers exposed to hand arm vibration had higher prevalence of musculoskeletal disorders. Future studies should include other contributing factors also like ergonomic interventions and workers' postures.

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“…Again, from the simulation results it is seen that the contact pressure decreases with the increase in the contact area. The increase in the contact area between the hand and handle reduces the contact pressure and prevents the excessive stress/strain transferred to the human hand-arm system [18]. The contact pressure was reduced by 26.5%, 25.4%, 22.8% and 18%, while the diameter increased from 30 mm to 50 mm during forces of 10 N, 20 N, 40 N and 50 N respectively.…”

Section: Discussionmentioning

confidence: 99%

Finite element analysis to assess the biomechanical behavior of a finger model gripping handles with different diameters

Tony¹,

Alphin²

2019

Biomedical Human Kinetics

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SummaryStudy aim: Interactions between the fingers and a handle can be analyzed using a finite element finger model. Hence, the biomechanical response of a hybrid human finger model during contact with varying diameter cylindrical handles was investigated numerically in the present study using ABAQUS/CAE.Materials and methods: The finite element index finger model consists of three segments: the proximal, middle, and distal phalanges. The finger model comprises skin, bone, subcutaneous tissue and nail. The skin and subcutaneous tissues were assumed to be non-linearly elastic and linearly visco-elastic. The FE model was applied to predict the contact interaction between the fingers and a handle with 10 N, 20 N, 40 N and 50 N grip forces for four different diameter handles (30 mm, 40 mm, 44mm and 50 mm). The model predictions projected the biomechanical response of the finger during the static gripping analysis with 200 incremental steps.Results: The simulation results showed that the increase in contact area reduced the maximal compressive stress/strain and also the contact pressure on finger skin. It was hypothesized in this study that the diameter of the handle influences the stress/strain and contact pressure within the soft tissue during the contact interactions.Conclusions: The present study may be useful to study the behavior of the finger model under the static gripping of hand-held power tools.

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Assessment of ergonomically designed handle shapes for low-frequency vibration responses

Cited by 5 publications

References 25 publications

An analytical study – dynamic behavior of the human hand to hold mechanical handle with and without coating

An analytical study – dynamic behavior of the human hand to hold mechanical handle with and without coating

An Investigation of Ergonomic Risk for Work-Related Musculoskeletal Disorders with Hand-Held Drilling

Finite element analysis to assess the biomechanical behavior of a finger model gripping handles with different diameters

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