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Título: MECHANICAL PERFORMANCE OF AN ORTHO-PLANAR SPRING COMPLIANT MECHANISM AFTER AGING TESTS
Autor: LUCAS FERREIRA LIMA DOS SANTOS
Colaborador(es): JOSE ROBERTO MORAES D ALMEIDA - Orientador
Catalogação: 18/NOV/2021 Língua(s): ENGLISH - UNITED STATES
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.
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
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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