Publicación: Simulação e otimização do comportamento mecânico de filmes poliméricos
Archivos
Fecha
2022
Editor/a
Director/a
Tutor/a
Coordinador/a
Prologuista
Revisor/a
Ilustrador/a
Derechos de acceso
info:eu-repo/semantics/openAccess
Título de la revista
ISSN de la revista
Título del volumen
Editor
Universidad Nacional de Educación a Distancia (España), Universidad Politécnica de Madrid. Departamento de Ingeniería Mecánica
Resumen
A partir de ensaios experimentais de filmes finos utilizou-se uma metodologia de superfície de resposta iterativa para estimar os parâmetros E (módulo de elasticidade) e K (coeficiente de deformação) considerando cada ensaio como um evento independente. Ademais, os parâmetros encontrados foram utilizados para a simulação em elementos finitos com uso do código Ansys Mechanical APDL para comparar as curvas de força vs deslocamento experimentais e as simuladas. Encontram-se E com valores de 269 MPa com desvio-padrão de 40 MPa, e para K de 14 com desvio-padrão de 2. Além disso, foram propostas curvas tensão-deformação sintéticas, similares às curvas experimentais, para analisar a influência das diferentes especificidades de um método estocástico e a influência das incertezas. O método foi capaz de estimar os parâmetros com precisão de até 6,3% para a resolução da força utilizada. Porém, adicionada a incerteza da espessura, a precisão do método cai para 22%.
From experimental thin film tests, an iterative response surface methodology was used to estimate the parameters E (elasticity modulus) and K (strain coefficient) considering each test as an independent event. Furthermore, the parameters found were used for the finite element simulation using the Ansys Mechanical APDL code to compare the experimental and simulated force vs displacement curves. E are found to have values of 269 MPa with a standard deviation of 40 MPa, and for K of 14 with a standard deviation of 2. In addition, synthetic stress-strain curves, like the experimental curves, were proposed to analyze the influence of different specificities of a stochastic method and the influence of uncertainties. The method was able to estimate the parameters with precision of up to 6.3% for the resolution of the force used. However, added to the thickness uncertainty, the accuracy of the method drops to 22%.
From experimental thin film tests, an iterative response surface methodology was used to estimate the parameters E (elasticity modulus) and K (strain coefficient) considering each test as an independent event. Furthermore, the parameters found were used for the finite element simulation using the Ansys Mechanical APDL code to compare the experimental and simulated force vs displacement curves. E are found to have values of 269 MPa with a standard deviation of 40 MPa, and for K of 14 with a standard deviation of 2. In addition, synthetic stress-strain curves, like the experimental curves, were proposed to analyze the influence of different specificities of a stochastic method and the influence of uncertainties. The method was able to estimate the parameters with precision of up to 6.3% for the resolution of the force used. However, added to the thickness uncertainty, the accuracy of the method drops to 22%.
Descripción
Categorías UNESCO
Palabras clave
PEBD, Otimização, ANSYS, APDL, MEF
Citación
Centro
E.T.S. de Ingenieros Industriales
Departamento
Mecánica