Effect of Cooling Rate on the Mechanical Strength of Carbon Fiber-Reinforced Thermoplastic Sheets in Press Forming

被引：15

作者：

Tatsuno, D. ^{[1
]}

Yoneyama, T. ^{[1
]}

Kawamoto, K. ^{[2
]}

Okamoto, M. ^{[2
]}

机构：

[1] Kanazawa Univ, Fac Mech Engn, Inst Sci & Engn, Kanazawa, Ishikawa 9201192, Japan

[2] Komatsu Ind Corp, 1-1 Shinmachi, Kanazawa, Ishikawa 9200225, Japan

来源：

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE | 2017年 / 26卷 / 07期

基金：

日本科学技术振兴机构;

关键词：

composites; cooling rate; die temperature; flexural strength; organic matrix; press forming; pressure; CF/PEEK COMPOSITES; MATRIX COMPOSITES; CONSOLIDATION;

D O I：

10.1007/s11665-017-2664-0

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The purpose of this study is to elucidate the effect of the cooling rate of the carbon fiber-reinforced thermoplastic (CFRTP) sheets on the mechanical property in the press forming within 1 min cycle time. In order to pay attention only to the compression stage after the deformation stage in press forming, a flat sheet of dimensions 200 mm3100 mm33 mm was produced. It was fabricated by stacking 15 CFRTP sheets of 0.2-mm-thick plain woven fabric impregnated with PA6, preheating them to 280 degrees C and pressing them at 5 MPa using a die cooled from near the melting temperature of PA6 with various cooling rates. Cooling rate of 226 degrees C/s with pressure holding time (defined in this study as the period that the pressure sensor detects high pressure) of 7 s and that of 24.4 degrees C/s with pressure holding time of 18 s gave a flexural strength of 536 and 733 MPa, respectively. It was found that the cooling rate during pressure holding is related to the mechanical property of press-formed CFRTP part.

引用

页码：3482 / 3488

页数：7

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