Redesign of a Failed Hoisting Shaft of a Vertical Transfer Device
The redesign of a failed hoisting shaft belonging to a 10 m stroke vertical transfer device (VTD) is presented. Firstly, the operation of the VTD is thoroughly analysed, the variation of loads and moments along the operating cycle is characterised, and transients such as emergency stop loads are cal...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
MDPI AG
2023-07-01
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| Series: | Eng |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2673-4117/4/3/112 |
| _version_ | 1797580293207490560 |
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| author | Filipe Alexandre Couto da Silva Paulo M. S. T. de Castro |
| author_facet | Filipe Alexandre Couto da Silva Paulo M. S. T. de Castro |
| author_sort | Filipe Alexandre Couto da Silva |
| collection | DOAJ |
| description | The redesign of a failed hoisting shaft belonging to a 10 m stroke vertical transfer device (VTD) is presented. Firstly, the operation of the VTD is thoroughly analysed, the variation of loads and moments along the operating cycle is characterised, and transients such as emergency stop loads are calculated. The selection of safety factors and duty cycle factors was followed by the shaft sizing. After an initial rough sizing, the high-cycle fatigue (HCF) design for cyclic bending moments was performed, first considering constant torque and then considering cyclic torque. The number of bending and torsion cycles performed by the hoisting shaft over 10 years was shown to exceed 10<sup>6</sup>, and an infinite life design is mandatory. The analyses showed that the initial shaft diameter was insufficient, thus justifying the failures observed before the present redesign. A classical fatigue model combining torsional shear stresses with bending stresses was used to take into account reversed torsional loading and ensure infinite fatigue life. This work highlights the need to thoroughly understand a machine’s operating cycle so that the wrong premises for fatigue design calculations are not assumed. |
| first_indexed | 2024-03-10T22:48:59Z |
| format | Article |
| id | doaj.art-2c39dd4b8a934fe9a57458b4bf9c7c9e |
| institution | Directory Open Access Journal |
| issn | 2673-4117 |
| language | English |
| last_indexed | 2024-03-10T22:48:59Z |
| publishDate | 2023-07-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Eng |
| spelling | doaj.art-2c39dd4b8a934fe9a57458b4bf9c7c9e2023-11-19T10:29:49ZengMDPI AGEng2673-41172023-07-01431981200210.3390/eng4030112Redesign of a Failed Hoisting Shaft of a Vertical Transfer DeviceFilipe Alexandre Couto da Silva0Paulo M. S. T. de Castro1Departamento de Engenharia Mecânica, Instituto Superior de Engenharia do Porto—ISEP, Instituto Politécnico do Porto, Rua Dr. António Bernardino de Almeida, 4249-015 Porto, PortugalFaculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, PortugalThe redesign of a failed hoisting shaft belonging to a 10 m stroke vertical transfer device (VTD) is presented. Firstly, the operation of the VTD is thoroughly analysed, the variation of loads and moments along the operating cycle is characterised, and transients such as emergency stop loads are calculated. The selection of safety factors and duty cycle factors was followed by the shaft sizing. After an initial rough sizing, the high-cycle fatigue (HCF) design for cyclic bending moments was performed, first considering constant torque and then considering cyclic torque. The number of bending and torsion cycles performed by the hoisting shaft over 10 years was shown to exceed 10<sup>6</sup>, and an infinite life design is mandatory. The analyses showed that the initial shaft diameter was insufficient, thus justifying the failures observed before the present redesign. A classical fatigue model combining torsional shear stresses with bending stresses was used to take into account reversed torsional loading and ensure infinite fatigue life. This work highlights the need to thoroughly understand a machine’s operating cycle so that the wrong premises for fatigue design calculations are not assumed.https://www.mdpi.com/2673-4117/4/3/112fatiguemachine elementsredesignshaftsVTD |
| spellingShingle | Filipe Alexandre Couto da Silva Paulo M. S. T. de Castro Redesign of a Failed Hoisting Shaft of a Vertical Transfer Device Eng fatigue machine elements redesign shafts VTD |
| title | Redesign of a Failed Hoisting Shaft of a Vertical Transfer Device |
| title_full | Redesign of a Failed Hoisting Shaft of a Vertical Transfer Device |
| title_fullStr | Redesign of a Failed Hoisting Shaft of a Vertical Transfer Device |
| title_full_unstemmed | Redesign of a Failed Hoisting Shaft of a Vertical Transfer Device |
| title_short | Redesign of a Failed Hoisting Shaft of a Vertical Transfer Device |
| title_sort | redesign of a failed hoisting shaft of a vertical transfer device |
| topic | fatigue machine elements redesign shafts VTD |
| url | https://www.mdpi.com/2673-4117/4/3/112 |
| work_keys_str_mv | AT filipealexandrecoutodasilva redesignofafailedhoistingshaftofaverticaltransferdevice AT paulomstdecastro redesignofafailedhoistingshaftofaverticaltransferdevice |