Do mechanical and environmental loading have a synergistic effect on the degradation of pultruded glass fiber reinforced polymers

Abstract This paper investigates the effect of simultaneous mechanical and environmental loading on the degradation rate of pultruded Glass Fiber Reinforced Polymer (GFRP) composites. The experimental program included testing a large number of GFRP coupons, with vinylester or polyester matrices, conditioned for 1000 or 2000 h under a wide range of sustained stresses and exposed to freshwater or saltwater at an elevated temperature of 60 °C. Mechanical tests, including tensile strength and elastic modulus measurements were performed on the GFRP composites. In addition, glass transition measurements, moisture uptake measurements, scanning electron microscopy, and acoustic emission testing were performed to better understand the synergistic effect of mechanical loading and environmental conditions.

[1]  Masayasu Ohtsu,et al.  Crack classification in concrete based on acoustic emission , 2010 .

[2]  Masayasu Ohtsu,et al.  Acoustic Emission Testing , 2006, Advanced Materials Research.

[3]  Tarek H. Almusallam,et al.  Durability of GFRP Rebars in Concrete Beams under Sustained Loads at Severe Environments , 2006 .

[4]  H. Murthy,et al.  Durability of GFRP nanocomposites subjected to hygrothermal ageing , 2015 .

[5]  Asghar Vatani Oskouei,et al.  Effect of harsh environments on mechanical properties of GFRP pultruded profiles , 2016 .

[6]  L. Hollaway.  A review of the present and future utilisation of FRP composites in the civil infrastructure with reference to their important in-service properties , 2010 .

[7]  J. Graham-Pole,et al.  Physical , 1998, The Lancet.

[8]  L. Bank.  Composites for Construction: Structural Design with FRP Materials , 2006 .

[9]  A. Mourad,et al.  Effect of Seawater and Warm Environment on Glass/Epoxy and Glass/Polyurethane Composites , 2010 .

[10]  Fabio Matta,et al.  Acoustic Emission Monitoring of Reinforced Concrete under Accelerated Corrosion , 2013 .

[11]  A. Fam,et al.  Durability in a Salt Solution of Pultruded Composite Materials Used in Structural Sections for Bridge Deck Applications , 2016 .

[12]  Frieder Seible,et al.  Use of FRP composites in civil structural applications , 2003 .

[13]  V. Karbhari.  Durability of composites for civil structural applications , 2007 .

[14]  Mario Guagliano,et al.  Development of an artificial neural network processing technique for the analysis of damage evolution in pultruded composites with acoustic emission , 2014 .

[15]  John J. Lesko,et al.  Characterization of fatigue and combined environment on durability performance of glass/vinyl ester composite for infrastructure applications , 2000 .

[16]  Guglielmo Carra,et al.  Ageing of pultruded glass fibre reinforced polymer composites exposed to combined environmental agents , 2014 .

[17]  A. Hammami,et al.  Durability and environmental degradation of glass‐vinylester composites , 2004 .

[18]  Peter J. de Groot,et al.  Real-time frequency determination of acoustic emission for different fracture mechanisms in carbon/epoxy composites , 1995 .

[19]  M. Benzeggagh,et al.  On the use of acoustic emission to investigate damage mechanisms in glass-fibre-reinforced polypropylene , 1994 .

[20]  Volker Altstädt,et al.  Acoustic emission analysis for characterisation of damage mechanisms in fibre reinforced thermosetting polyurethane and epoxy , 2014 .

[21]  David W. Lischer,et al.  The Durability of E-Glass/Vinyl Ester Composite Materials Subjected to Environmental Conditioning and Sustained Loading , 1998 .

[22]  Renaud Gutkin,et al.  On acoustic emission for failure investigation in CFRP: Pattern recognition and peak frequency analyses , 2011 .

[23]  S. Cabral-Fonseca,et al.  Durability of pultruded glass-fiber-reinforced polyester profiles for structural applications , 2006 .

[24]  B. Benmokrane,et al.  Durability Gap Analysis for Fiber-Reinforced Polymer Composites in Civil Infrastructure , 2003 .

[25]  C. Helbling,et al.  Durability Assessment of Combined Environmental Exposure and Bending , 2005, SP-230: 7th International Symposium on Fiber-Reinforced (FRP) Polymer Reinforcement for Concrete Structures.

[26]  Carl R. Schultheisz,et al.  Effects of environmental aging on the properties of pultruded GFRP , 1999 .

[27]  Brahim Benmokrane,et al.  Physical, Mechanical, and Durability Characterization of Preloaded GFRP Reinforcing Bars , 2010 .

[28]  M. Pharaoh,et al.  Identification of failure modes in glass/polypropylene composites by means of the primary frequency content of the acoustic emission event , 2004 .

[29]  Julio F. Davalos,et al.  Accelerated aging tests for evaluations of durability performance of FRP reinforcing bars for concrete structures , 2007 .

[30]  Peng Wang,et al.  Durability of Glass Fiber-Reinforced Polymer Reinforcing Bars in Concrete Environment , 2002 .

[31]  Brahim Benmokrane,et al.  Effect of Sustained Load and Environment on Long-Term Tensile Properties of Glass Fiber-Reinforced Polymer Reinforcing Bars , 2005 .

[32]  Joachim L. Grenestedt,et al.  Comparison of mechanical properties of glass fiber/vinyl ester and carbon fiber/vinyl ester composites , 2005 .

[33]  Masayasu Ohtsu,et al.  DAMAGE ASSESSMENT OF REINFORCED CONCRETE BEAMS QUALIFIED BY ACOUSTIC EMISSION , 2002 .

[34]  R. Gupta,et al.  Effect of Aging Environment on Degradation of Glass-Reinforced Epoxy , 2002 .

[35]  Brahim Benmokrane,et al.  Durability of GFRP Reinforcing Bars Embedded in Moist Concrete , 2009 .

[36]  F. Ellyin,et al.  Environmental effects on the mechanical properties of glass-fiber epoxy composite tubular specimens , 2004 .

[37]  Fernando A. Branco,et al.  Artificial Accelerated Ageing of GFRP Pultruded Profiles Made of Polyester and Vinylester Resins: Characterisation of Physical–Chemical and Mechanical Damage , 2012 .

[38]  Ehab El-Salakawy,et al.  Durability of GFRP Bars’ Bond to Concrete under Different Loading and Environmental Conditions , 2011 .

[39]  Marcus Schneider,et al.  The combined effects of load, moisture and temperature on the properties of E-glass/epoxy composites , 2005 .

[40]  Lawrence C. Bank,et al.  Accelerated Test Methods to Determine the Long-Term Behavior of FRP Composite Structures: Environmental Effects , 1995 .