Analysis of musculoskeletal disorder risks at layup process in aviation industry
In the hand layup process at composite manufacturing especially aerospace, the workers are prone to be diagnosed with ergonomics issues. Literature from various sources suggested this issue should be addressed correctly and efficiently. In Malaysian aerospace manufacturing, the process of laying up...
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| Format: | Thesis |
| Language: | English English |
| Published: |
2022
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| Online Access: | http://eprints.utem.edu.my/id/eprint/26931/1/Analysis%20of%20musculoskeletal%20disorder%20risks%20at%20layup%20process%20in%20aviation%20industry.pdf http://eprints.utem.edu.my/id/eprint/26931/2/Analysis%20of%20musculoskeletal%20disorder%20risks%20at%20layup%20process%20in%20aviation%20industry.pdf http://eprints.utem.edu.my/id/eprint/26931/ https://plh.utem.edu.my/cgi-bin/koha/opac-detail.pl?biblionumber=122152 |
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| Summary: | In the hand layup process at composite manufacturing especially aerospace, the workers are prone to be diagnosed with ergonomics issues. Literature from various sources suggested this issue should be addressed correctly and efficiently. In Malaysian aerospace manufacturing, the process of laying up the carbon fibre reinforcement sheets layer by layer is done by hand. It is also said by literature that manual handling is one of the factors in getting the high risk of musculoskeletal disorder (MSD). From current problem statements, the biggest issue was the Low Back Pain (LBP) becomes a chronic occupational disease. Hence, training workers with proper body posture while working can reduce the risk of getting MSD. In achieving this, objectives of this project are determined; to investigate the body discomforts of manual layup workers using standardised Nordic questionnaires and working posture using RULA assessment in DELMIA V5R2016; to analyse the activities that produce workers’ fatigue using sEMG, heart rate and video recording during manual layup process and to formulate and validate the correlation of angle of lumbar with the duration of bending, muscle activity, heart rate at manual layup process. The results of the research were respondents confirmed that 41% were feeling discomfort in the lower back at the scale of 4 (painful). From the Nordic questionnaires, the research had been able to identify common activities in the aviation industry. Since Rapid Upper Limb Assessment (RULA) is one of the methods to identify the risk of getting MSD, the research was extended by using DELMIA V5 software to analyse the postures of workers during manual layup. Next, it was found that all postures related to manual hand layup were scored 7 which needed immediate improvement. Moreover, psychophysical and biomechanical factors were also included in the research, where it was found that the correlation between muscle activity at the lumbar, heart rate, duration of bending and angle of lumbar does not correlate to one another. Conclusively, it is recommended for future research to go in-depth on the limitation of this research and to advise safe working conditions and bending posture to be limited at a 30-degree bending angle especially at the lumbar area. |
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