NUMERICAL AND EXPERIMENTAL LOW-VELOCITY IMPACT BEHAIVOR OF SANDWICH PLATES WITH VISCOELASTIC CORE

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SADEGHNEJAD SOROUSH; TARAZ JAMSHIDI YOUSEF; SADIGHI MOJTABA; OHADI HAMEDANI ABDOLREZA

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Journal: Iranian Journal of Polymer Science and Technology Year:2016 | Volume:29 | Issue:1 (ISSUE NO.141) Page(s): 55-72

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Title

NUMERICAL AND EXPERIMENTAL LOW-VELOCITY IMPACT BEHAIVOR OF SANDWICH PLATES WITH VISCOELASTIC CORE

Author(s)

SADEGHNEJAD SOROUSH | TARAZ JAMSHIDI YOUSEF | SADIGHI MOJTABA | OHADI HAMEDANI ABDOLREZA | Issue Writer Certificate

Keywords

VISCOELASTIC COREQ1

LOW VELOCITY IMPACTQ2

NUMERICAL MODELLINGQ1

PRONY SERIEQ1

EXPERIMENTAL TESTSQ1

Abstract

A numerical and experimental low-velocity impact behavior of sandwich plates have been presently studied with regard to the compressibility and viscoelasticity features of their cores. Face sheets were assumed to be anisotropic composites or isotropic aluminum materials and a viscoelastic behavior has been considered for core. The boundary conditions are assumed to be simply supported or rigid. Abaqus, as FEM software, and its python script programming feature, have been used to model the specimens. To model hyper-viscoelastic nonlinear behavior of the core, Ogden hyper-foam elasticity and PRONY SERIEs approach are manipulated. To solve the numerical problem, dynamic explicit solver option with sufficient solving amplitude has been used. PRONY SERIEs have been used to model the core time-dependent behavior. In conjunction with a simple indentation experiment, FEM used to formulate a novel method for finding the PRONY SERIEs coefficients. By performing some low-velocity impact experiments, the impact force and displacement of the composite sandwich plates have been investigated. The results indicate that increasing the structural damping increases the contact time and missing energy and decreases the stored energy of the system. The structures with composite face sheets have a minimum ratio of upper face sheet displacement to lower face sheet displacement in comparison to those with the isotropic face sheets. Impact behavior of isotropic face sheet specimens are more flattened than that of the composite face sheets. In addition, the specific energy stored in the sandwich plates with composite face sheets, on different supports, is greater than that stored in the aluminum face sheets.

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APA: Copy

SADEGHNEJAD, SOROUSH, TARAZ JAMSHIDI, YOUSEF, SADIGHI, MOJTABA, & OHADI HAMEDANI, ABDOLREZA. (2016). NUMERICAL AND EXPERIMENTAL LOW-VELOCITY IMPACT BEHAIVOR OF SANDWICH PLATES WITH VISCOELASTIC CORE. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), 29(1 (ISSUE NO.141)), 55-72. SID. https://sid.ir/paper/6345/en

Vancouver: Copy

SADEGHNEJAD SOROUSH, TARAZ JAMSHIDI YOUSEF, SADIGHI MOJTABA, OHADI HAMEDANI ABDOLREZA. NUMERICAL AND EXPERIMENTAL LOW-VELOCITY IMPACT BEHAIVOR OF SANDWICH PLATES WITH VISCOELASTIC CORE. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)[Internet]. 2016;29(1 (ISSUE NO.141)):55-72. Available from: https://sid.ir/paper/6345/en

IEEE: Copy

SOROUSH SADEGHNEJAD, YOUSEF TARAZ JAMSHIDI, MOJTABA SADIGHI, and ABDOLREZA OHADI HAMEDANI, “NUMERICAL AND EXPERIMENTAL LOW-VELOCITY IMPACT BEHAIVOR OF SANDWICH PLATES WITH VISCOELASTIC CORE,” IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), vol. 29, no. 1 (ISSUE NO.141), pp. 55–72, 2016, [Online]. Available: https://sid.ir/paper/6345/en

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