Nonlinear Behavior of Natural Fiber/Bio-Based Matrix Composites

Joffe, Roberts; Rozite, Liva; Pupurs, Andrejs

doi:10.1007/978-1-4614-4241-7_19

Cited by 2 publications

(1 citation statement)

References 13 publications

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“…Time-dependent properties of bio-based composites are the result of the viscoelastic nature of both the matrix [39] and the fiber [40]. In recent years, there have been various studies on viscoelastic behavior of bio-based composites [41][42][43][44][45] and long-term behavior of other polymers [46][47][48][49]. One way to predict time-dependent behavior in bio-based composites, is through modeling long-term creep behavior.…”

Section: Service Life Predictionmentioning

confidence: 99%

Effect of Chemical Treatment of Flax Fiber and Resin Manipulation on Service Life of Their Composites Using Time-Temperature Superposition

2015

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Abstract:In recent years there has been a resurgence of interest in the usage of natural fiber reinforced composites in more advanced structural applications. As a result, the need for improving their mechanical properties, as well as service life modeling and predictions have arisen. In this study effect of alkaline treatment of flax fiber as well as addition of 1% acrylic resin to vinyl ester on mechanical properties and long-term creep behavior of flax/vinyl ester composites was investigated. To perform the alkaline treatment, fibers were immersed into 1500 mL of 10 g/L sodium hydroxide/ethanol solution at 78˝C for 2 h. Findings revealed that alkaline treatment was successful in increasing interlaminar shear, tensile and flexural strength of the composite but decreased the tensile and flexural modulus by 10%. Addition of acrylic resin to the vinyl ester resin improved all mechanical properties except the flexural modulus which was decreased by 5%. In order to evaluate the long-term behavior, creep compliance master curves were generated using the time-temperature superposition principle. Results suggests that fiber and matrix treatments delay the creep response and slows the process of creep in flax/vinyl ester composites in the steady state region, respectively.

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