Stress Constraints
Mostrando 1-12 de 48 artigos, teses e dissertações.
-
1. Free Vibration of flexible soft-core sandwiches according to layerwise theories differently accounting for the transverse normal deformability
Abstract This study aims to generalize a previously developed accurate and inexpensive 3-D zig-zag theory up to an arbitrary representation form and to determine which simplifications are yet accurate in determining transverse shear and normal stress/deformation effects on vibrations of soft-core sandwiches with not moving middle/neutral plane (pumping). Nat
Lat. Am. j. solids struct.. Publicado em: 28/10/2019
-
2. MICROMORPHOLOGICAL OBSERVATION OF EUCALYPTUS SEEDS, MULTIVARIATE STATISTICAL ANALYSES AND MODELING OF THEIR GERMINATION UNDER SALT STRESS AND OSMOTIC CONSTRAINT
ABSTRACT Micromorphological characters including surface, length and width of seeds were recorded for 19 species of Eucalyptus (Myrtaceae) using stereomicroscope to determine the importance of seed morphological characters as an additional tool for identification.With the aim of selecting and valorizing abiotic-stress-tolerant species with landscape and indu
CERNE. Publicado em: 09/09/2019
-
3. Múltiplas exposições ao risco de faltar ao trabalho nas escolas da Educação Básica no Brasil
Resumo: O objetivo do estudo foi identificar as múltiplas exposições ao risco de faltar ao trabalho, independentemente do motivo relatado pelos professores (n = 6.510). Foram utilizados dados de um inquérito telefônico sobre a saúde, condições de trabalho e absenteísmo entre professores da Educação Básica no Brasil (Estudo Educatel, 2015/2016). A
Cad. Saúde Pública. Publicado em: 15/04/2019
-
4. Impact Damage Analysis with Stress Continuity Constraints Fulfilment at Damaged-Undamaged Regions and at Layer Interfaces
Abstract Low-velocity impacts have a relevant importance for safety of laminated and sandwich composite structures, because they are highly susceptible to damage. In this paper, a 3D cost effective zig-zag model is developed in order to efficiently simulate such impacts. It a priori fulfills the continuity of out-of-plane stresses at layer interfaces, the co
Lat. Am. j. solids struct.. Publicado em: 2017-08
-
5. Heat Transfer Search Algorithm for Sizing Optimization of Truss Structures
Abstract Heat transfer search (HTS) is a novel metaheuristic optimization algorithm that simulates the laws of thermodynamics and heat transfer. In this study, the HTS algorithm is adapted to truss structure optimization. Sizing optimization searches for the minimum weight of a structure subject to stress and displacement constraints. Three truss structures
Lat. Am. j. solids struct.. Publicado em: 2017-03
-
6. Stress State at the Vertex of a Composite Wedge, One Side of Which Slides Without Friction Along a Rigid Surface
Abstract For studying the stress-strain state at singular points and their neighborhoods new concept is proposed. A singular point is identified with an elementary volume that has a characteristic size of the real body representative volume. This makes it possible to set and study the restrictions at that point. It is shown that problems with singular points
Lat. Am. j. solids struct.. Publicado em: 2017
-
7. The Composite Ground Finite Layer Method and its Application to Pile Foundation Analysis
Abstract To study the influence of a foundation structure on the ground, the finite layer method of composite ground is derived based on the finite layer method (FLM) theory of the semi-analytic numerical method and the force method principle of elastic material, which is used to analyze a layered ground including multiple internal constraint planes. By simp
Lat. Am. j. solids struct.. Publicado em: 2016-12
-
8. A Backtracking Search Algorithm for the Simultaneous Size, Shape and Topology Optimization of Trusses
Abstract This paper presents a Backtracking Search Optimization algorithm (BSA) to simultaneously optimize the size, shape and topology of truss structures. It focuses on the optimization of these three aspects since it is well known that the most effective scheme of truss optimization is achieved when they are simultaneously considered. The minimization of
Lat. Am. j. solids struct.. Publicado em: 2016-12
-
9. Topological and Topographical Optimization of Automotive Spring Lower Seat
Abstract The design of a suspension system emphasizes weight reduction in this high-computation technology era. Understanding that the reduction of suspension mass can lead to cost and material reduction is important; moreover, the riding performance of the vehicle should be improved. Topology and topography structure optimization for the spring lower seat i
Lat. Am. j. solids struct.. Publicado em: 2016-07
-
10. Experimentally Validated Combustion and Piston Fatigue Life Evaluation Procedures for the Bi-Fuel Engines, Using an Integral-Type Fatigue Criterion
Abstract A relatively complete procedure for high cycle fatigue life assessment of the engine components is outlined in the present paper. The piston is examined as a typical component of the engine. In this regard, combustion process and transient heat transfer simulations, determination of the instantaneous variations of the pressure and temperature in the
Lat. Am. j. solids struct.. Publicado em: 2016-06
-
11. El profesor como catalizador de energía emocional frente a la ambivalencia del nuevo entorno tecno-educativo
Abstract In this paper, I aim to achieve two complementary objectives. Firstly, to show the constitutive constraints to the theoretical and empirical studies which analyze the causal links between technology and education. I seek to evidence that such endeavor lacks a happy ending due to its own endogenous limitations. Secondly, I aim to evidence that, beyon
Educ. Pesqui.. Publicado em: 17/05/2016
-
12. A Cultural Algorithm for Optimal Design of Truss Structures
Abstract A cultural algorithm was utilized in this study to solve optimal design of truss structures problem achieving minimum weight objective under stress and deflection constraints. The algorithm is inspired by principles of human social evolution. It simulates the social interaction between the peoples and their beliefs in a belief space. Cultural Algori
Lat. Am. j. solids struct.. Publicado em: 2015-09