A5051684767- Composite Structure Analysis and Optimization
- Mechanical Behavior of Composites
- Structural Analysis and Optimization
- Structural Load-Bearing Analysis
- Aeroelasticity and Vibration Control
- Topology Optimization in Engineering
- Epoxy Resin Curing Processes
- Structural Response to Dynamic Loads
- Textile materials and evaluations
- Mechanical Engineering and Vibrations Research
- Advanced Fiber Optic Sensors
- Fatigue and fracture mechanics
- Structural Analysis of Composite Materials
- Vibration and Dynamic Analysis
- Ultrasonics and Acoustic Wave Propagation
- High-Velocity Impact and Material Behavior
- Natural Fiber Reinforced Composites
- Structural Health Monitoring Techniques
- Photonic and Optical Devices
- Probabilistic and Robust Engineering Design
- Material Properties and Processing
- Additive Manufacturing and 3D Printing Technologies
- Fiber-reinforced polymer composites
- Engineering and Material Science Research
- Advanced MEMS and NEMS Technologies
Universidade de São Paulo
1995-2023
Universidade Estadual Paulista (Unesp)
2023
Instituto Tecnológico de Aeronáutica
2008-2017
Instituto de Pesquisas Tecnológicas
2016
Instituto de Aeronáutica e Espaço
2001-2011
This study assesses the effect of porosity in moisture absorption polymeric composites. The preparation composites samples with porosity, control, and measurement void content, behavior carbon/epoxy laminates are discussed. Rheological analyses used to characterize viscosity prepregs either presence or absence moisture. Polymeric different levels voids were produced submitted hygrothermal conditioning behavior. It was found that rate water uptake maximum level depends on content specimen...
Polymer composites used above their glass transition temperatures Tg present a substantial degradation of physical properties; therefore material's temperature and its change with moisture absorption are practical importance. Little attention has been paid to the role adhesive bonding between reinforcing fiber matrix, particularly for BMI matrix. In this work effect on dynamic mechanical behavior fiber/matrix interface was investigated. Two systems were evaluated: carbon fabric/epoxy...
A fully 3D failure model to predict damage in composite structures subjected multiaxial loading is presented this paper. The formulation incorporates shear nonlinearities effects, irreversible strains, and strain rate effects by using a viscoplastic damageable constitutive law. proposed enables the prediction of initiation propagation combining stress‐based, mechanics fracture approaches within an unified energy based context. An objectivity algorithm has been embedded into avoid problems...
It is well known that voids and environmental conditions may affect the strength of composite laminates. Despite fact facilitate moisture absorption, effect on laminates in presence has not been addressed literature. Moreover, most attention focused composites made unidirectional carbon-epoxy prepreg tape. This article presents experimental results combined polymer composites. The experiments consider two types reinforcement (eight harness satin fabric tape), resin systems (epoxy...
Pressure vessels are widely used equipment in several industries, and can operate at high pressure temperature, which cause major accidents the event of a failure. The objective this work is to analyze behavior longitudinal circumferential stresses three specific points on wall vessel, two distant geometric discontinuity (at top side) one close intersection connection) through theoretical, numerical experimental analyses. vessel piece offshore oil platforms part natural gas dehydration...
An experimental program to characterize the effect of voids on strength composite laminates is presented, and adequacy a fracture criterion represent data for compressive interlaminar shear assessed. The investigates material system (epoxy matrix vs bismaleimide matrix), type reinforcement (unidirectional tape woven fabric), loading (compression shear) critical void content. Laminates produced with carbon fabric/epoxy, tape/epoxy, fabric/bismaleimide were an intentionally high ultrasonic...
Thermal residual stresses introduced during the manufacturing process and their effect on buckling load of stringer reinforced composite plates is investigated. The principal idea to include stiffeners perimeter plate thereby, manufacture, induce a favorable thermal residual-stress state in structure; these arise by considering difference expansion coefficients elastic properties stiffeners. In this manner, it shown that can be tailored significantly enhance performance structure. analysis...
The effectiveness of using piezoelectric elements to enhance the mechanical performance laminated structures by inducing favorable in-plane stresses is investigated. A finite element formulation presented for analysis Timoshenko beams with an arbitrary number actuators and/or sensors placed along length beam. Von Kdrman nonlinear strain-displacement relations are used and ideal linear behavior assumed actuation. It shown that if beam longitudinally restrained at both ends piezolectric induce...
A three-layer finite element model for the vibration analysis of sandwich plates with laminated composite face sheets is evaluated. In are represented as Reissner-Mindlin plates, and core modeled a three-dimensional continuum. This representation allows accurate modeling wide range types. The problem reduced to two dimensions by analytical through-thickness integration energy expressions evaluation mass stiffness matrices. results from this compared based on solid elements, classical...