Abstract
The present work addressed the creep behavior of quasi-unidirectional E-glass fabric reinforced polypropylene composites under off-axis tensile loading. A series of creep tests were performed on the composite at three different loading stress levels. The creep response of off-axis samples of quasi-unidirectional composites under a constant loading level can be clearly observed. A phenomenological viscoplasticity model was built for describing the creep behavior of the composite. To improve the accuracy of prediction, cyclic loading-unloading tests were adopted to determine the material constants in the model. The predicted results in terms of the strains after a load over a period of time were found to be satisfactory, compared with the experimental results. In addition, same failure mechanism was found in off-axis samples under quasi-static and creep loading cases.
Highlights
IntroductionAs the matrix for composites, thermoplastic polymers exhibit many advantages over thermosets, like short processing time and intrinsic recyclability [1]
Fiber reinforced thermoplastic composites (FRTCs) have been widely used in many applications.As the matrix for composites, thermoplastic polymers exhibit many advantages over thermosets, like short processing time and intrinsic recyclability [1]
It is demonstrated that fiber reinforcement can limit the creep behavior of matrix in FRTCs [7,8]
Summary
As the matrix for composites, thermoplastic polymers exhibit many advantages over thermosets, like short processing time and intrinsic recyclability [1]. The long service time in combination with the viscous properties in the thermoplastic polymers emphasize the requirement of the investigation of long-term behavior of FRTCs [2]. The creep behavior observed in composites originates from the matrix [5]. It is demonstrated that fiber reinforcement can limit the creep behavior of matrix in FRTCs [7,8]. Most of research on the creep behavior of FRTCs has mainly focused on discontinuous fiber reinforced thermoplastic composites (short fibers [7,9] and long fibers [10,11]). The experimental results showed that the creep behavior of composites is affected by the factors such as the creep behavior of matrix, the geometry, the distribution of reinforcement and the fiber-matrix interfacial properties
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
