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Flow properties of long fiber reinforced PP sheets
Author(s) -
Hamada Hiroyuki,
Yamaguchi Susumu
Publication year - 1995
Publication title -
journal of vinyl and additive technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.295
H-Index - 35
eISSN - 1548-0585
pISSN - 1083-5601
DOI - 10.1002/vnl.730010313.n
Subject(s) - materials science , composite material , lamination , flow (mathematics) , finite element method , plane (geometry) , sheet moulding compound , material flow , transverse plane , deformation (meteorology) , molding (decorative) , slippage , structural engineering , mechanics , layer (electronics) , engineering , geometry , ecology , physics , mathematics , biology
Long glass fiber reinforced PP sheets, called stampable sheets, are attractive materials because of their light weight, high strength, high moldability, recyclability, and so on. Therefore, stampable sheets have been used in comparatively large products such as bumper beams or seat shells in the car industry. In order to design molds and select adequate molding conditions, flow patterns of stampable sheet must be characterized. In this paper, we carried out the finite element method of the flow of stampable sheet, using the lamination theory. One‐ply sheet can be regarded as two PP resin layers and one reinforced layer. Large deformation analysis was performed with heat condition analysis, and the material was modeled as an elastic‐perfect plastic material. In‐plane and out‐plane flow patterns were analyzed. In the former, the material flow occurred in the plane, as in the fabrication of plane sheet, and in the latter, the flow pattern was as in the case of ribs or boss parts. Numerical results suggested that in‐plane flow was characterized by slippage flow, and out‐plane flow was characterized by squeezing flow.