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S. Benfratello¹, A. Cirello², L. Palizzolo¹, A. Spada¹ and P. Tabbuso¹

¹Department of Civil, Enviromental, Aerospatial, Material Engineering, University of Palermo, Italy
²Department of Chemical, Management, Information Technology, Mechanical Engineering, University of Palermo, Italy

Keywords: speckle interferometry, pultruded material, glass fiber reinforced polymer materials, displacement field..

Summary

The use of glass fiber reinforced polymer materials (GFRP) has increased in recent years for structural engineering. The intrinsic non isotropic nature of GFRP materials together with many manufacturing characteristics encourages the extensive investigation of the real constitutive behaviour. Among the full-field contactless techniques electronic speckle-pattern interferometry (ESPI) plays an important role as a result of its capability to produce real-time fringe patterns on objects with optically rough surfaces, with a displacement sensitivity close to the light wavelength. The aim of this paper is to experimentally analyze the bending behaviour of GFRP specimens. This goal is achieved first by applying ESPI, handled by a phase-stepping technique, to obtain the experimental four-point flexural response of GFRP prismatic specimens with their longitudinal axis aligned with the pultrusion direction as well as with the orthogonal one. All the analysis are carried out by means of an in-plane set-up configuration and the images obtained are filtered by an appropriate developed iterative filter. The second step is to numerically reproduce the experimental behaviour by suitably setting the constitutive material model in an appropriate finite element code. The results obtained confirm that the GFRP material tested does not behave in an isotropic way and possesses a different Young's modulus in tension and compression.

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Front Page Browse CCP CSETS CTR IJRT Other Authors Search Purchase Guide FAQ Contact us	Civil-Comp Proceedings ISSN 1759-3433 CCP: 106 PROCEEDINGS OF THE TWELFTH INTERNATIONAL CONFERENCE ON COMPUTATIONAL STRUCTURES TECHNOLOGY Edited by: Paper 250 Experimental and Numerical Analysis of the Flexural Behaviour of Glass Fiber Reinforced Polymer Pultruded Material S. Benfratello¹, A. Cirello², L. Palizzolo¹, A. Spada¹ and P. Tabbuso¹ ¹Department of Civil, Enviromental, Aerospatial, Material Engineering, University of Palermo, Italy ²Department of Chemical, Management, Information Technology, Mechanical Engineering, University of Palermo, Italy doi:10.4203/ccp.106.250 purchase the full-text of this paper Full Bibliographic Reference for this paper S. Benfratello, A. Cirello, L. Palizzolo, A. Spada, P. Tabbuso, "Experimental and Numerical Analysis of the Flexural Behaviour of Glass Fiber Reinforced Polymer Pultruded Material", in , (Editors), "Proceedings of the Twelfth International Conference on Computational Structures Technology", Civil-Comp Press, Stirlingshire, UK, Paper 250, 2014. doi:10.4203/ccp.106.250 Keywords: speckle interferometry, pultruded material, glass fiber reinforced polymer materials, displacement field.. Summary The use of glass fiber reinforced polymer materials (GFRP) has increased in recent years for structural engineering. The intrinsic non isotropic nature of GFRP materials together with many manufacturing characteristics encourages the extensive investigation of the real constitutive behaviour. Among the full-field contactless techniques electronic speckle-pattern interferometry (ESPI) plays an important role as a result of its capability to produce real-time fringe patterns on objects with optically rough surfaces, with a displacement sensitivity close to the light wavelength. The aim of this paper is to experimentally analyze the bending behaviour of GFRP specimens. This goal is achieved first by applying ESPI, handled by a phase-stepping technique, to obtain the experimental four-point flexural response of GFRP prismatic specimens with their longitudinal axis aligned with the pultrusion direction as well as with the orthogonal one. All the analysis are carried out by means of an in-plane set-up configuration and the images obtained are filtered by an appropriate developed iterative filter. The second step is to numerically reproduce the experimental behaviour by suitably setting the constitutive material model in an appropriate finite element code. The results obtained confirm that the GFRP material tested does not behave in an isotropic way and possesses a different Young's modulus in tension and compression. purchase the full-text of this paper (price £20) go to the previous paper go to the next paper return to the table of contents return to the book description purchase this book (price £65 +P&P)
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