Título: | MECHANICAL PERFORMANCE OF AN ORTHO-PLANAR SPRING COMPLIANT MECHANISM AFTER AGING TESTS | ||||||||||||
Autor: |
LUCAS FERREIRA LIMA DOS SANTOS |
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Colaborador(es): |
JOSE ROBERTO MORAES D ALMEIDA - Orientador |
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Catalogação: | 18/NOV/2021 | Língua(s): | ENGLISH - UNITED STATES |
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Tipo: | TEXT | Subtipo: | THESIS | ||||||||||
Notas: |
[pt] Todos os dados constantes dos documentos são de inteira responsabilidade de seus autores. Os dados utilizados nas descrições dos documentos estão em conformidade com os sistemas da administração da PUC-Rio. [en] All data contained in the documents are the sole responsibility of the authors. The data used in the descriptions of the documents are in conformity with the systems of the administration of PUC-Rio. |
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Referência(s): |
[pt] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=56002&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=56002&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.56002 | ||||||||||||
Resumo: | |||||||||||||
In contrast to traditional mechanisms, a compliant mechanism relies
on the deflection of its flexible members to generate motion, while presenting
advantages such as no need for lubrication and easier assembly. An
ortho-planar spring (OPS) compliant mechanism was analyzed in this work
and its mechanical performance after hygrothermal and ultraviolet radiation
aging tests was studied. The aging analysis performed here addresses the
performance of compliant mechanisms after aging processes that can help
in the design of future compliant mechanisms. ASTM D638 tensile test type
I samples were also subjected to aging to serve as a comparison for OPS
samples. The samples were subjected to three different types of aging conditions,
namely water immersion, oil immersion and ultraviolet radiation.
The liquid immersion aging tests were performed in three temperature levels:
room temperature, 50 C degrees and 70 C degrees. In general, tensile samples showed
significant statistical changes in Young s modulus and elongation at break,
while OPS samples did not present considerable statistical change in any
aging condition, which indicate that the mechanical properties and elastic
capabilities of OPS samples were not affected by aging processes. Although
more testing with the specific materials, environment, and exposure time
would be required to verify its use in a specific application, the findings
of this study suggest that compliant mechanisms show promise for use in
applications where aging is a concern, and their life is expected to be within
the limits of this aging study.
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