Cohesive Crack Model
Mostrando 1-7 de 7 artigos, teses e dissertações.
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1. Crack-cocaine users have less family cohesion than alcohol users
Objective: Many studies correlate characteristics of family functioning and the development of drug addiction. This study sought to evaluate and compare the family environment styles of two groups of psychoactive substance users: 1) alcohol-only users and 2) crack-cocaine users. Methods: Three hundred and sixty-four users of alcohol, crack-cocaine, and oth
Rev. Bras. Psiquiatr.. Publicado em: 30/08/2017
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2. Numerical simulations of crack propagation tests in adhesive bonded joints
Mainly due to their low weight, low cost and ease of assembly, the adhesive bonds have emerged as a promising technology. However, the lack of adequate tools of design and control remain an obstacle to the use of the adhesives. In this work a cohesive interface model formulated within the framework of damage mechanics is applied for the simulation of decohes
Lat. Am. j. solids struct.. Publicado em: 2012-06
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3. Nonlinear boundary element models to analyse fracture problems and reliability/optimization models applied to structures submitted to fatigue / Modelos não lineares do método dos elementos de contorno para análise de problemas de fratura e aplicação de modelos de confiabilidade e otimização em estruturas submetidas à fadiga
This work deals with the development of boundary element method (BEM) formulations to be used in engineering problems. Particular attention is given to using these formulations in development of reliability and optimization models applied to fatigue problems. Contributions to BEM formulations are developed, particularly, models that deal with crack growth in
Publicado em: 2009
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4. Formulação do método dos elementos de contorno para análise de fratura / Boundary element formulations applied to fracture mechanics
No contexto do método dos elementos de contorno, este trabalho apresenta comparativamente três formulações em distintos aspectos. Visando a análise de sólidos bidimensionais no campo da mecânica da fratura, primeiramente é estudada a equação singular ou em deslocamentos. Em seguida, a formulação hiper-singular ou em forças de superfície é aval
Publicado em: 2006
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5. The linear elastic fracture mechanics and the cohesive crack model in predicting the fracturing of rocks / A mecânica da fratura elástica linear e o modelo coesivo na previsão do fraturamento de rochas
This present work has been developed aiming to verify the scale effect influence on the stress-strain curve form as well on the strength of two Brazilian rocks: Botucatu sandstone and basalt from Serra Geral Formation. Using samples of those rocks three point beam bending experiments have been made in with the crack displacement opening mouth was controlled.
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 22/08/1997
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6. Analise de parametros de tenacidade ao fraturamento de concretos obtidos em ensaios de flexão de vigas
Concrete is a composite that behaves inelasticaly, with failure characterized by softening. Crack in this kind of material is said to be cohesive. The development of an inelastic process zone ahead of the crack front as well as the formation of the cohesive interface, at laboratory level, are directly infIuenced by the specimen Size. The effect of the specim
Publicado em: 1997
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7. Scaling theory for quasibrittle structural failure
This inaugural article has a twofold purpose: (i) to present a simpler and more general justification of the fundamental scaling laws of quasibrittle fracture, bridging the asymptotic behaviors of plasticity, linear elastic fracture mechanics, and Weibull statistical theory of brittle failure, and (ii) to give a broad but succinct overview of various applica
National Academy of Sciences.