polymers-08-00196 - polymers Article Mechanical...

Info icon This preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
polymers Article Mechanical Characterization of the Tensile Properties of Glass Fiber and Its Reinforced Polymer (GFRP) Composite under Varying Strain Rates and Temperatures Yunfu Ou 1 , Deju Zhu 1, *, Huaian Zhang 1 , Liang Huang 1, *, Yiming Yao 2 , Gaosheng Li 1 and Barzin Mobasher 2 1 College of Civil Engineering, Hunan University, Changsha 410082, China; [email protected] (Y.O.); [email protected] (H.Z.); [email protected] (G.L.) 2 School of Sustainable Engineering and Built Environment, Arizona State University, Tempe, AZ 85287, USA; [email protected] (Y.Y.); [email protected] (B.M.) * Correspondence: [email protected] (D.Z.); [email protected] (L.H.); Tel.: +86-731-8882-3861 (D.Z.); +86-135-0731-5881 (L.H.) Academic Editor: Alper Ilki Received: 26 March 2016; Accepted: 10 May 2016; Published: 19 May 2016 Abstract: Unidirectional glass fiber reinforced polymer (GFRP) is tested at four initial strain rates (25, 50, 100 and 200 s ´ 1 ) and six temperatures ( ´ 25, 0, 25, 50, 75 and 100 ˝ C) on a servo-hydraulic high-rate testing system to investigate any possible effects on their mechanical properties and failure patterns. Meanwhile, for the sake of illuminating strain rate and temperature effect mechanisms, glass yarn samples were complementally tested at four different strain rates (40, 80, 120 and 160 s ´ 1 ) and varying temperatures (25, 50, 75 and 100 ˝ C) utilizing an Instron drop-weight impact system. In addition, quasi-static properties of GFRP and glass yarn are supplemented as references. The stress–strain responses at varying strain rates and elevated temperatures are discussed. A Weibull statistics model is used to quantify the degree of variability in tensile strength and to obtain Weibull parameters for engineering applications. Keywords: polymer-matrix composites (PMCs); mechanical properties; stress/strain curves; deformation; statistics 1. Introduction Fiber reinforced polymer (FRP) composites have many merits, such as high stiffness/weight and strength/weight ratios, advanced fatigue and corrosion resistances, etc. , providing significant functional and economic benefits, ranging from strength enhancement and weight reduction to durability features. With decreasing manufacturing costs, recently, they have won the attention of engineers involved in the construction of civil structures [ 1 ]. Structural elements reinforced with FRP, however, might be subjected to dynamic loadings, such as wind loads, earthquake loads, explosions, etc. and vary temperature conditions during their service life. Under such conditions, the mechanical properties of FRP involving Young’s Modulus, tensile strength, toughness, etc. may suffer great changes [ 2 6 ]. Therefore, the investigation of the mechanical properties of FRP composites under dynamic loadings and different temperatures is essential to design the structures with this kind of materials.
Image of page 1

Info icon This preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

{[ snackBarMessage ]}

What students are saying

  • Left Quote Icon

    As a current student on this bumpy collegiate pathway, I stumbled upon Course Hero, where I can find study resources for nearly all my courses, get online help from tutors 24/7, and even share my old projects, papers, and lecture notes with other students.

    Student Picture

    Kiran Temple University Fox School of Business ‘17, Course Hero Intern

  • Left Quote Icon

    I cannot even describe how much Course Hero helped me this summer. It’s truly become something I can always rely on and help me. In the end, I was not only able to survive summer classes, but I was able to thrive thanks to Course Hero.

    Student Picture

    Dana University of Pennsylvania ‘17, Course Hero Intern

  • Left Quote Icon

    The ability to access any university’s resources through Course Hero proved invaluable in my case. I was behind on Tulane coursework and actually used UCLA’s materials to help me move forward and get everything together on time.

    Student Picture

    Jill Tulane University ‘16, Course Hero Intern