Spelling suggestions: "subject:"engrenagens polim?ticas"" "subject:"engrenagens polim?riche""
1 |
Avalia??o da aplica??o de comp?sitos polim?ricos em engrenagens c?nicas de transmiss?o de m?quinas agr?colasMelegari, Luis Fernando 25 July 2017 (has links)
Submitted by Caroline Xavier (caroline.xavier@pucrs.br) on 2017-10-05T11:34:54Z
No. of bitstreams: 1
TES_LUIS_FERNANDO_MELEGARI_COMPLETO.pdf: 6221745 bytes, checksum: 6fea166b18494e244d24dddc530d9abc (MD5) / Approved for entry into archive by Caroline Xavier (caroline.xavier@pucrs.br) on 2017-10-05T11:35:04Z (GMT) No. of bitstreams: 1
TES_LUIS_FERNANDO_MELEGARI_COMPLETO.pdf: 6221745 bytes, checksum: 6fea166b18494e244d24dddc530d9abc (MD5) / Made available in DSpace on 2017-10-05T11:35:13Z (GMT). No. of bitstreams: 1
TES_LUIS_FERNANDO_MELEGARI_COMPLETO.pdf: 6221745 bytes, checksum: 6fea166b18494e244d24dddc530d9abc (MD5)
Previous issue date: 2017-07-25 / The use of polymeric materials to substitute an array of others like metal has its
development level increased when new compounds are applied as well as new
formation technologies. An approach of the main factors lately used for its assessment
was necessary to prove the polymeric material?s behavior when applied in gears for
strength transmission. The presented analysis were based on practical experiences
and through methods of finite elements, using diverse composites and addition loads
to form the tested polymers in controlled conditions for torque, temperature and
rotation, making use of the device development of movement and specific control. The
polymeric gears behave in different ways according to specific conditions of
temperature, rotation and torque request, presenting a variety of results due to the
polymers used in its formation. The geometry of the project and the profile construction
of the conical gears? tooth had direct influence under the performance, being possible
to reduce the tensions in the tooth?s root. The injected pieces supply a body of proves
to a mechanic dynamic thermal analysis, these results present discrepancy among the
base materials regarding Tm. The replacement of metallic materials for polymeric
materials must consider the characteristics of each application. / A utiliza??o de materiais polim?ricos em substitui??o a diversos outros como o metal
tem seu n?vel de desenvolvimento aumentado na aplica??o de novos compostos bem
como novas tecnologias de forma??o. Uma abordagem dos principais fatores
ultimamente utilizados para sua avalia??o fez-se necess?ria para a comprova??o do
comportamento dos materiais polim?ricos na aplica??o em engrenagens de
transmiss?o de for?a. As an?lises apresentadas foram baseadas em experimenta??es
pr?ticas e atrav?s de m?todos de elementos finitos, utilizando diversos comp?sitos e
cargas de adi??o para forma??o dos pol?meros testados em condi??es controladas de
torque, temperatura e rota??o, utilizando-se de desenvolvimento de dispositivo de
movimenta??o e controle espec?fico. As engrenagens polim?ricas comportaram-se de
diferentes formas em condi??es espec?ficas de temperatura, rota??o e solicita??o de
torque, apresentando resultados variados em fun??o dos pol?meros utilizados em sua
forma??o. A geometria de projeto e constru??o do perfil do dente das engrenagens
c?nicas teve influ?ncia direta em rela??o ao desempenho, sendo poss?vel a redu??o
das tens?es na raiz do dente. As pe?as injetadas forneceram corpos de prova para
an?lises t?rmico din?mico mec?nicas, os resultados destas apresentaram
discrep?ncia entre os materiais base no que se refere a Tm. A substitui??o de materais
met?licos por materiais polim?ricos deve levar em considera??o as caracter?sticas
para cada aplica??o.
|
Page generated in 0.1049 seconds