Study and analysis of fractures in gears from automotive transmissions.
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo de conferência |
Idioma: | eng |
Título da fonte: | Biblioteca Digital de Teses e Dissertações da UFCG |
Texto Completo: | http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/32653 |
Resumo: | Premature wear and fractures in automotive transmissions represent considerable negative costs for automakers, as they cause the vehicle to be disabled and its repair is usually costly and time consuming. Thus, understanding the source of these defects could permit us to more reliably propose alternatives, making this a valuable area of research. In this study, distinct defects in the helical gears of manual transmissions were selected and mechanical analysis was carried out focusing on the root cause of the failures. The study included hardness tests, liquid penetrate inspection (LPI) and visual inspection. In the Rockwell hardness test, values were obtained for the steel pieces which had been thermally treated by carbonitriding. In the liquid penetrate inspection, cracks were found present inside the teeth of the evaluated gears. The results obtained are consistent with the literature. It is noteworthy that the gears analyzed already had explicit defects, which prevented their reuse. We conclude that the failures in automotive transmission gears are related to various factors, usually related to torques above the design limit or lack of lubrication and maintenance, which implies premature failures and consequently a shorter than expected service life. |
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Universidade Federal de Campina GrandeUFCGBrasilEngenharia de Produção.HardnessFracturesAutomotive transmissionsGearsBending fatigueTooth wearDurezaFraturasTransmissões automotivasEngrenagensFadiga de flexãoDesgaste dos dentes9Study and analysis of fractures in gears from automotive transmissions.Estudo e análise de fraturas em engrenagens de transmissões automotivas.20212023-11-03T21:29:08Z2023-11-032023-11-03T21:29:08ZPremature wear and fractures in automotive transmissions represent considerable negative costs for automakers, as they cause the vehicle to be disabled and its repair is usually costly and time consuming. Thus, understanding the source of these defects could permit us to more reliably propose alternatives, making this a valuable area of research. In this study, distinct defects in the helical gears of manual transmissions were selected and mechanical analysis was carried out focusing on the root cause of the failures. The study included hardness tests, liquid penetrate inspection (LPI) and visual inspection. In the Rockwell hardness test, values were obtained for the steel pieces which had been thermally treated by carbonitriding. In the liquid penetrate inspection, cracks were found present inside the teeth of the evaluated gears. The results obtained are consistent with the literature. It is noteworthy that the gears analyzed already had explicit defects, which prevented their reuse. We conclude that the failures in automotive transmission gears are related to various factors, usually related to torques above the design limit or lack of lubrication and maintenance, which implies premature failures and consequently a shorter than expected service life.Submitted by Renata Cardoso (renaatachaves97@hotmail.com) on 2023-11-03T21:29:08Z No. of bitstreams: 1 STUDY AND ANALYSIS OF FRACTURES IN GEARS FROM AUTOMOTIVE TRANSMISSIONS - ANAIS IX SIMEP ARTIGO 2021.pdf: 293368 bytes, checksum: 362fce067f35d4c71852e49e7d786886 (MD5)Made available in DSpace on 2023-11-03T21:29:08Z (GMT). No. of bitstreams: 1 STUDY AND ANALYSIS OF FRACTURES IN GEARS FROM AUTOMOTIVE TRANSMISSIONS - ANAIS IX SIMEP ARTIGO 2021.pdf: 293368 bytes, checksum: 362fce067f35d4c71852e49e7d786886 (MD5) Previous issue date: 2021http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/32653CUNHA, Kathleen Cristina Silveira; SILVA, Carlos Roberto Ramos da; SANTOS, Ramon Oliveira Borges dos; GAMA, Renann Pereira; CABETTE, Regina Elaine Santos; PRADO, Pedro Henrique Colman. Study and analysis of fractures in gears from automotive transmissions. In: SIMPÓSIO DE ENGENHARIA DE PRODUÇÃO, 9., 2021. Anais [...]. Caruaru - PE: UNIFAVIP, 2021. ISSN: 2318-9258. Disponível em: http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/32653info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/conferenceObjectengCUNHA, Kathleen Cristina Silveira.SILVA, Carlos Roberto Ramos da.SANTOS, Ramon Oliveira Borges dos.GAMA, Renann Pereira.CABETTE, Regina Elaine Santos.PRADO, Pedro Henrique Colman.info:eu-repo/semantics/openAccessreponame:Biblioteca Digital de Teses e Dissertações da UFCGinstname:Universidade Federal de Campina Grande (UFCG)instacron:UFCGLICENSElicense.txtlicense.txttext/plain; charset=utf-81748http://dspace.sti.ufcg.edu.br:8080/xmlui/bitstream/riufcg/32653/2/license.txt8a4605be74aa9ea9d79846c1fba20a33MD52ORIGINALSTUDY AND ANALYSIS OF FRACTURES IN GEARS FROM AUTOMOTIVE TRANSMISSIONS - ANAIS IX SIMEP ARTIGO 2021.pdfSTUDY AND ANALYSIS OF FRACTURES IN GEARS FROM AUTOMOTIVE TRANSMISSIONS - ANAIS IX SIMEP ARTIGO 2021.pdfapplication/pdf293368http://dspace.sti.ufcg.edu.br:8080/xmlui/bitstream/riufcg/32653/1/STUDY+AND+ANALYSIS+OF+FRACTURES+IN+GEARS+FROM+AUTOMOTIVE+TRANSMISSIONS+-+ANAIS+IX+SIMEP+ARTIGO+2021.pdf362fce067f35d4c71852e49e7d786886MD51riufcg/326532023-11-28 16:03:08.786oai:localhost: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Biblioteca Digital de Teses e Dissertaçõeshttp://bdtd.ufcg.edu.br/PUBhttp://dspace.sti.ufcg.edu.br:8080/oai/requestbdtd@setor.ufcg.edu.br || bdtd@setor.ufcg.edu.bropendoar:48512023-11-28T19:03:08Biblioteca Digital de Teses e Dissertações da UFCG - Universidade Federal de Campina Grande (UFCG)false |
dc.title.pt_BR.fl_str_mv |
Study and analysis of fractures in gears from automotive transmissions. |
dc.title.alternative.pt_BR.fl_str_mv |
Estudo e análise de fraturas em engrenagens de transmissões automotivas. |
title |
Study and analysis of fractures in gears from automotive transmissions. |
spellingShingle |
Study and analysis of fractures in gears from automotive transmissions. CUNHA, Kathleen Cristina Silveira. Engenharia de Produção. Hardness Fractures Automotive transmissions Gears Bending fatigue Tooth wear Dureza Fraturas Transmissões automotivas Engrenagens Fadiga de flexão Desgaste dos dentes |
title_short |
Study and analysis of fractures in gears from automotive transmissions. |
title_full |
Study and analysis of fractures in gears from automotive transmissions. |
title_fullStr |
Study and analysis of fractures in gears from automotive transmissions. |
title_full_unstemmed |
Study and analysis of fractures in gears from automotive transmissions. |
title_sort |
Study and analysis of fractures in gears from automotive transmissions. |
author |
CUNHA, Kathleen Cristina Silveira. |
author_facet |
CUNHA, Kathleen Cristina Silveira. SILVA, Carlos Roberto Ramos da. SANTOS, Ramon Oliveira Borges dos. GAMA, Renann Pereira. CABETTE, Regina Elaine Santos. PRADO, Pedro Henrique Colman. |
author_role |
author |
author2 |
SILVA, Carlos Roberto Ramos da. SANTOS, Ramon Oliveira Borges dos. GAMA, Renann Pereira. CABETTE, Regina Elaine Santos. PRADO, Pedro Henrique Colman. |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
CUNHA, Kathleen Cristina Silveira. SILVA, Carlos Roberto Ramos da. SANTOS, Ramon Oliveira Borges dos. GAMA, Renann Pereira. CABETTE, Regina Elaine Santos. PRADO, Pedro Henrique Colman. |
dc.subject.cnpq.fl_str_mv |
Engenharia de Produção. |
topic |
Engenharia de Produção. Hardness Fractures Automotive transmissions Gears Bending fatigue Tooth wear Dureza Fraturas Transmissões automotivas Engrenagens Fadiga de flexão Desgaste dos dentes |
dc.subject.por.fl_str_mv |
Hardness Fractures Automotive transmissions Gears Bending fatigue Tooth wear Dureza Fraturas Transmissões automotivas Engrenagens Fadiga de flexão Desgaste dos dentes |
description |
Premature wear and fractures in automotive transmissions represent considerable negative costs for automakers, as they cause the vehicle to be disabled and its repair is usually costly and time consuming. Thus, understanding the source of these defects could permit us to more reliably propose alternatives, making this a valuable area of research. In this study, distinct defects in the helical gears of manual transmissions were selected and mechanical analysis was carried out focusing on the root cause of the failures. The study included hardness tests, liquid penetrate inspection (LPI) and visual inspection. In the Rockwell hardness test, values were obtained for the steel pieces which had been thermally treated by carbonitriding. In the liquid penetrate inspection, cracks were found present inside the teeth of the evaluated gears. The results obtained are consistent with the literature. It is noteworthy that the gears analyzed already had explicit defects, which prevented their reuse. We conclude that the failures in automotive transmission gears are related to various factors, usually related to torques above the design limit or lack of lubrication and maintenance, which implies premature failures and consequently a shorter than expected service life. |
publishDate |
2021 |
dc.date.issued.fl_str_mv |
2021 |
dc.date.accessioned.fl_str_mv |
2023-11-03T21:29:08Z |
dc.date.available.fl_str_mv |
2023-11-03 2023-11-03T21:29:08Z |
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http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/32653 |
dc.identifier.citation.fl_str_mv |
CUNHA, Kathleen Cristina Silveira; SILVA, Carlos Roberto Ramos da; SANTOS, Ramon Oliveira Borges dos; GAMA, Renann Pereira; CABETTE, Regina Elaine Santos; PRADO, Pedro Henrique Colman. Study and analysis of fractures in gears from automotive transmissions. In: SIMPÓSIO DE ENGENHARIA DE PRODUÇÃO, 9., 2021. Anais [...]. Caruaru - PE: UNIFAVIP, 2021. ISSN: 2318-9258. Disponível em: http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/32653 |
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http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/32653 |
identifier_str_mv |
CUNHA, Kathleen Cristina Silveira; SILVA, Carlos Roberto Ramos da; SANTOS, Ramon Oliveira Borges dos; GAMA, Renann Pereira; CABETTE, Regina Elaine Santos; PRADO, Pedro Henrique Colman. Study and analysis of fractures in gears from automotive transmissions. In: SIMPÓSIO DE ENGENHARIA DE PRODUÇÃO, 9., 2021. Anais [...]. Caruaru - PE: UNIFAVIP, 2021. ISSN: 2318-9258. Disponível em: http://dspace.sti.ufcg.edu.br:8080/jspui/handle/riufcg/32653 |
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eng |
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Universidade Federal de Campina Grande |
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Universidade Federal de Campina Grande |
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