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      Influence of Preload Type on the Low Velocity Impact Response of Glass Fiber Reinforced Thermoplastic Composites

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      International Polymer Processing
      Carl Hanser Verlag

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          Abstract

          This paper reports the low velocity impact behavior of preloaded E-glass/polypropylene sandwich composite plates. In particular, the effects of the type of preload and pre-strain amount on the impact behavior of composite plates are reported. Low velocity impact tests of specimens subjected to biaxial tension, compression and tension-compression (shear) were carried out using a drop-weight impact machine under a hemispherical impactor. Deformations ranging from 250 to 500 microstrains were imposed by a special fixture fabricated for this purpose. Single impact loadings were applied to the composite sandwich structures at different impact energies which were varied from rebounding case (10 J) to the perforation case (40 J). Impact results were explained in terms of typical contact force – deformation (F-D) curves and energy – time diagrams. The maximum contact force, deformation and absorbed energy of the specimens were compared to investigate the influence of pre-strain amount. In addition to the single impact tests, repeated impact behavior of composite sandwich structures subjected to different preload types were obtained with the same impact energy levels. The experimental results showed that the maximum contact force and maximum absorbed energy were considerably different in these situations. However, the repetition number of the specimens at the higher impact energies subjected to shear preloads was largely unaffected.

          Most cited references25

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          The impact resistance of composite materials — a review

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            Failure analysis of low velocity impact on thin composite laminates: Experimental and numerical approaches

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              The low velocity impact response of foam-based sandwich structures

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                Author and article information

                Journal
                ipp
                International Polymer Processing
                Carl Hanser Verlag
                0930-777X
                2195-8602
                29 April 2020
                : 35
                : 2
                : 193-202
                Affiliations
                Department of Mechanical Engineering, Dokuz Eylul University, Izmir, Turkey
                Author notes
                [] Mail address: Okan Ozdemir, Dept. of Mechanical Engineering, Dokuz Eylul University, Izmir, Turkey, 35390, E-mail: ozdemir.okan@ 123456deu.edu.tr
                Article
                IPP3893
                10.3139/217.3893
                bca9d33e-8b76-407d-a0e7-5daf5b05a107
                © 2020, Carl Hanser Verlag, Munich
                History
                : 25 September 2019
                : 09 January 2020
                Page count
                References: 29, Pages: 10
                Categories
                Regular Contributed Articles

                Materials technology,Materials characterization,Materials science
                Materials technology, Materials characterization, Materials science

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