Hygrothermal effects on the free vibration and buckling of laminated composites with cutouts

Natarajan, Sundararajan; Deogekar, Pratik Sharad; Ganapathi, M.; Belouettar, Salim

doi:10.1016/j.compstruct.2013.10.009

Cited by 71 publications

(18 citation statements)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This research, carried out via the finite element method, presents results that prove that with the increase of uniform conditions of temperature and humidity, the variations in the natural frequency of free vibration do not behave linearly and can generate instability in the structural element, depending on the values of the temperature and humidity and the relationship between the width and the thickness of the plate [6].…”

Section: Structural Elements Made From Laminated Compositementioning

confidence: 94%

Influence of thermal residual stresses on the free vibration of reinforced laminates

Sánchez

Capote

Carrillo

2017

DYNA

View full text Add to dashboard Cite

The use of laminated composite materials has increased in modern engineering, mainly in those projects that require an assurance of good strength and durability. It has been found that some properties of the material that ensure proper performance can be affected by the occurrence of residual stresses caused by the manufacturing process. In this paper, the influence of thermal residual stresses on the free vibration of reinforced plates is analyzed. For the experimental study, a square, reinforced, prepreg laminate was used. The laminate was reinforced using two different types of reinforcement: lateral and perimetral. The plates were prepared using two different techniques. The first group of laminates was prepared by curing the reinforcement at 177 °C. The second group of laminates was prepared by secondary bonding of the reinforcement to the laminate at room temperature (22 °C). A numerical model was elaborated for comparison with the experimental results. Accuracy was observed when comparing experimental and numerical results, showing that the presence of residual thermal stress affects the value of the natural frequencies of free vibration and the characteristic modal form of reinforced plates. Regardless of the type of reinforcement used, a notable increase in these values was observed, even when the element was simply supported.Keywords: Laminates; thermal stresses; free vibration; frequency; cure temperature.Influencia de las tensiones térmicas residuales en la vibración libre de laminados reforzados Resumen El uso de compuestos laminados se ha incrementado en la ingeniería moderna, fundamentalmente en proyectos en los cuales se requiere garantizar una adecuada resistencia y durabilidad. Se ha comprobado que algunas de las propiedades del material pueden ser afectadas por la aparición de tensiones residuales durante el proceso de manufactura. En este artículo, la influencia de las tensiones térmicas residuales en la vibración libre de compuestos laminados es analizada. Para el estudio experimental se empleó un laminado cuadrado de tipo pre-impregnado. El laminado fue reforzado usando dos tipos de refuerzos: laterales y perimetrales. Las placas fueron elaboradas usando dos diferentes técnicas: el primer tipo de laminados fue elaborado curando tanto la placa como los refuerzos a 177 °C de manera simultánea y posteriormente enfriados a la temperatura de servicio, mientras que para el segundo tipo de placas tanto las láminas como los refuerzos fueron preparados de forma independiente y pegados a temperatura de operación (22 °C). Un modelo numérico fue elaborado para comparar estos resultados con los resultados experimentales. Una buena precisión fue observada al comparar resultados numéricos y experimentales, mostrando que la presencia de tensiones térmicas residuales afecta el valor de las frecuencias naturales de vibración libre y la forma modal característica. Independientemente del tipo de refuerzo empleado, un notable incremento en estos valores fue observado, cuando el elemento se encuentra sim...

show abstract

Section: Structural Elements Made From Laminated Compositementioning

confidence: 94%

Influence of thermal residual stresses on the free vibration of reinforced laminates

Sánchez

Capote

Carrillo

2017

DYNA

View full text Add to dashboard Cite

show abstract

“…The result is that the temperature shows little effect on the stiffness of [θ m /90 n ] s composite laminates. Natarajan et al [16] investigated the effect of moisture and the thermal gradient on the flexural vibration and buckling of laminated composite plates with cutouts using an extended finite element method. Among these methods, the progressive damage method, which combines continuum damage mechanics with FE analyses and possesses the ability of tracing the damage initiation, propagation and ultimate failure, as well as offers an ability to explore failure modes and mechanisms, has been paid more attention [17][18][19].…”

Section: Although Intuitional Information Of Mechanical Behaviors Formentioning

confidence: 99%

A progressive failure analysis model for composite structures in hygrothermal environments

Zhang

Zhou

et al. 2015

Composite Structures

View full text Add to dashboard Cite

“…(29) into (28), the governing equations of the pre-buckling state may be expressed in terms of the in-plane displacements, as follows: …”

Section: Governing Equations Of the Auxetic Functionally Graded Platementioning

confidence: 99%

Biaxial thermo-mechanical buckling of orthotropic auxetic FGM plates with temperature and moisture dependent material properties on elastic foundations

Mansouri

Shariyat

2015

Composites Part B: Engineering

View full text Add to dashboard Cite

Hygrothermal effects on the free vibration and buckling of laminated composites with cutouts

Cited by 71 publications

References 34 publications

Influence of thermal residual stresses on the free vibration of reinforced laminates

Influence of thermal residual stresses on the free vibration of reinforced laminates

A progressive failure analysis model for composite structures in hygrothermal environments

Biaxial thermo-mechanical buckling of orthotropic auxetic FGM plates with temperature and moisture dependent material properties on elastic foundations

Contact Info

Product

Resources

About