Título: | STRESS INTENSITY FACTOR ANALYSIS FOR A CRACKED PLATE WITH RIVETED AND BONDED REINFORCEMENTS | ||||||||||||
Autor: |
VITOR LIMA MESQUITA |
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Colaborador(es): |
LUIZ CARLOS WROBEL - Orientador |
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Catalogação: | 23/JUN/2022 | Língua(s): | PORTUGUESE - BRAZIL |
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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=59722&idi=1 [en] https://www.maxwell.vrac.puc-rio.br/projetosEspeciais/ETDs/consultas/conteudo.php?strSecao=resultado&nrSeq=59722&idi=2 |
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DOI: | https://doi.org/10.17771/PUCRio.acad.59722 | ||||||||||||
Resumo: | |||||||||||||
The emergence of fractures in structural designs has been a problem for
engineering for some decades, and one of the areas where this topic is widely
studied is in commercial aircraft. Several accidents have occurred in the last
decades due to the appearance of a fracture in commercial aircraft, and for this
reason the study of fracture mechanics is so important for this field of engineering.
A structural component is tolerant of damage if it can safely sustain critical length
fractures until it is repaired or its economic life has expired. Reinforcers or stiffeners
have the main function of improving the resistance and stability of these structures
and providing a means of decelerating or stopping the propagation of fractures in
nuclear containments, reactors, viaducts, tall buildings, aircraft, ship hulls, bridges
and offshore structures. Analyzing the stress intensity factor and how the behavior
of a sheet with and without stiffeners is different are some of the issues studied in
this work. The stress-intensity factor (SIF), a parameter that describes the intensity
of the singular stress field, has been used successfully to estimate fracture strength
and fatigue crack growth rates in situations where the assumptions of linear
elasticity are valid. In this work, the SIF was obtained for plates with adhesive and
riveted reinforcements, based on the finite element method (FEM) using quarterpoint elements through simulations carried out in the ABAQUS software. Forces in
the rivet were calculated for a crack with riveted and evenly spaced stringers. The
complete results presented are compared with values found in the literature through
graphs. The results show that the stress intensity factor for the hardened sheet is
significantly lower than for an un-hardened sheet for both studied stiffener cases.
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