ANALYTICAL/EMPIRICAL STUDY ON INDENTATION BEHAVIOR OF SANDWICH PLATE WITH FOAM CORE AND COMPOSITE FACE SHEETS

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DARIUSHI SOHEIL; SADIGHI MOJTABA

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Paper Information

Journal: Iranian Journal of Polymer Science and Technology Year:2017 | Volume:30 | Issue:3 (ISSUE NO. 149) Page(s): 235-245

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Information Journal Paper

Title

ANALYTICAL/EMPIRICAL STUDY ON INDENTATION BEHAVIOR OF SANDWICH PLATE WITH FOAM CORE AND COMPOSITE FACE SHEETS

Author(s)

DARIUSHI SOHEIL | SADIGHI MOJTABA | Issue Writer Certificate

Keywords

CONTACT LAWQ1

SANDWICH PLATEQ1

INDENTATIONQ1

GLASS/EPOXY COMPOSITEQ1

ACRYLONITRILE FOAMQ1

Abstract

Sandwich structures are widely used in aerospace, automobile, high speed train and civil applications. Sandwich structures consist of two thin and stiff skins and a thick and light weight core. In this study, the obligatory mandate of a SANDWICH PLATE contact constitutes a flexible foam core and composite skins with a hemispherical rigid punch has been studied by an analytical/empirical method. In sandwich structures, calculation of force distribution under the punch nose is complicated, because the core is flexible and the difference between the modulus of elasticity of skin and core is large. In the present study, an exponential correlation between the contact force and INDENTATION is proposed. The coefficient and numerical exponent were calculated using the experimental INDENTATION results. A model based on a highorder sandwich panel theory was used to study the bending behavior of SANDWICH PLATE under hemispherical punch load. In the first method, the force distribution under the punch nose was calculated by the proposed method and multiplied to deformation of related point in the loading area to calculate the potential energy of the external loads.In the second method, the punch load was modeled as a point force and multiplied to deformation of maximum indented point. The results obtained from the two methods were compared with the experimental results. INDENTATION and bending tests were carried out on SANDWICH PLATEs with glass/epoxy skins and a styrene/acrylonitrile foam core. In the bending test, a simply support condition was set and in the INDENTATION test the sandwich specimens were put on a rigid support. Indeed, in this position the punch movement was equal the INDENTATION. The comparison between the analytical and experimental results showed that the proposed method significantly improved the accuracy of analysis.

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APA: Copy

DARIUSHI, SOHEIL, & SADIGHI, MOJTABA. (2017). ANALYTICAL/EMPIRICAL STUDY ON INDENTATION BEHAVIOR OF SANDWICH PLATE WITH FOAM CORE AND COMPOSITE FACE SHEETS. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), 30(3 (ISSUE NO. 149) ), 235-245. SID. https://sid.ir/paper/6702/en

Vancouver: Copy

DARIUSHI SOHEIL, SADIGHI MOJTABA. ANALYTICAL/EMPIRICAL STUDY ON INDENTATION BEHAVIOR OF SANDWICH PLATE WITH FOAM CORE AND COMPOSITE FACE SHEETS. IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN)[Internet]. 2017;30(3 (ISSUE NO. 149) ):235-245. Available from: https://sid.ir/paper/6702/en

IEEE: Copy

SOHEIL DARIUSHI, and MOJTABA SADIGHI, “ANALYTICAL/EMPIRICAL STUDY ON INDENTATION BEHAVIOR OF SANDWICH PLATE WITH FOAM CORE AND COMPOSITE FACE SHEETS,” IRANIAN JOURNAL OF POLYMER SCIENCE AND TECHNOLOGY (PERSIAN), vol. 30, no. 3 (ISSUE NO. 149) , pp. 235–245, 2017, [Online]. Available: https://sid.ir/paper/6702/en

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