THE RESPONSE OF SANDWICH PANELS WITH RIGID POLYURETHANE FOAM CORES UNDER FLEXURAL LOADING

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MIRZA POUR M.A.; BEHESHTI M.H.; VAFAIAN M.

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Journal Paper

Paper Information

Journal: Iranian Polymer Journal Year:2005 | Volume:14 | Issue:12 (66) Page(s): 1082-1088

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Title

THE RESPONSE OF SANDWICH PANELS WITH RIGID POLYURETHANE FOAM CORES UNDER FLEXURAL LOADING

Author(s)

MIRZA POUR M.A. | BEHESHTI M.H. | VAFAIAN M. | Issue Writer Certificate

Keywords

POLYURETHANE FOAM

SANDWICH STRUCTURE

FLEXURAL

DEBONDING STRENGTH

FAILURE MODE

Abstract

An experimental study was undertaken to investigate and optimize the fabrication processing conditions of the SANDWICH STRUCTUREs designed for FLEXURAL load bearing applications. Sandwich beams, each with two glass/epoxy faces and a rigid POLYURETHANE FOAM core were constructed under four different processing conditions. Wet and dry faces were applied at two temperatures to atteine these four conditions. It has been shown that in comparison with the first processing condition (wet at 25oC) the specific FLEXURAL strengths of the second one (dry at 25oC), the third one (dry at 70oC) and the fourth one (dry at 70oC with a thin layer of an adhesive) are increased by 38% and 209%, 267%, respectively. The reason behind this significant enhancement is demonstrated to be related to the debond strength of the core-face interface. It has been demonstrated that the debond strength of the core-face and core plays an important role in enhancing the FLEXURAL rigidity and controlling of the failure mechanisms. If the core material be polymeric foam, the core and DEBONDING STRENGTHs at the core-face interface will almost entirely dictate the structural sandwich composite performance especially under flexture. Results showed that the core strength decreases, but the DEBONDING STRENGTH of the core-face interface increases with the increment of the processing temperature during the preparation of the rigid POLYURETHANE FOAM core. We also observed that by increasing the DEBONDING STRENGTH of the core-face interface, the FAILURE MODE changes from debonding of the core-face interface to the failure of the face. Finally, the SANDWICH STRUCTUREs were obtained with the excellent performance under FLEXURAL loading.

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APA: Copy

MIRZA POUR, M.A., BEHESHTI, M.H., & VAFAIAN, M.. (2005). THE RESPONSE OF SANDWICH PANELS WITH RIGID POLYURETHANE FOAM CORES UNDER FLEXURAL LOADING . IRANIAN POLYMER JOURNAL (ENGLISH), 14(12 (66)), 1082-1088. SID. https://sid.ir/paper/529917/en

Vancouver: Copy

MIRZA POUR M.A., BEHESHTI M.H., VAFAIAN M.. THE RESPONSE OF SANDWICH PANELS WITH RIGID POLYURETHANE FOAM CORES UNDER FLEXURAL LOADING . IRANIAN POLYMER JOURNAL (ENGLISH)[Internet]. 2005;14(12 (66)):1082-1088. Available from: https://sid.ir/paper/529917/en

IEEE: Copy

M.A. MIRZA POUR, M.H. BEHESHTI, and M. VAFAIAN, “THE RESPONSE OF SANDWICH PANELS WITH RIGID POLYURETHANE FOAM CORES UNDER FLEXURAL LOADING ,” IRANIAN POLYMER JOURNAL (ENGLISH), vol. 14, no. 12 (66), pp. 1082–1088, 2005, [Online]. Available: https://sid.ir/paper/529917/en

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