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89333627金蟲 (小有名氣)
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[求助]
英語高手 幫忙 修改 潤色一個(gè)摘要
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The present paper developed a molding process for a new kind of z-pins applicable to C/C composites. Polyvinyl alcohol (PVA) was adopted as the matrix of z-pins since it has few solid residues in inert high-temperature environment. Highly concentrated PVA aqueous solution was prepared to impregnate the carbon fiber bundle. And draw forming method from small-hole-cavity dies was used to mold PVA-matrix z-pins. Four z-pins with different resin content were made by four dies with cavity diameters of 0.50mm, 0.60mm, 0.70mm and 0.80mm respectively. The piercing processes and properties of the z-pins were analyzed by the tests of piercing them into carbon fiber laminated fabrics. The results show that the measured value of PVA resin volume content of the z-pins is slightly larger than the theoretical value. And the z-pin prepared in the molding die with cavity diameter of 0.70mm(P7) has the best piercing property. Its resin volume content is 45.6%. The maximum compressive stress in the whole piercing process of P7 is the lowest compared with the z-pins molded by the other dies, and there is little damage to the piercing tip of P7 after penetration. Besides, it could be at least fully pierce 9mm thick laminated fabrics. 主要 修改語法錯(cuò)誤，灰常感謝！ |
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89333627: 金幣+50, 翻譯EPI+1, ★★★★★最佳答案, 非常感謝！ 2014-08-13 11:02:44
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89333627: 金幣+50, 翻譯EPI+1, ★★★★★最佳答案, 非常感謝！ 2014-08-13 11:02:44
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Very well-written abstract. The present paper developed a molding process for a new kind of z-pins applicable to C/C composites. Polyvinyl alcohol (PVA) was adopted as the matrix of z-pins since it has few solid residues in inert high-temperature environment. Highly concentrated PVA aqueous solution was prepared to impregnate the carbon fiber bundle. DRAW forming method from small-hole-cavity dies was used to mold PVA-matrix z-pins. Four z-pins with different resin content were made by four dies with cavity diameters of 0.50 mm, 0.60 mm, 0.70 mm and 0.80 mm(,) respectively. The piercing processes and properties of the z-pins were analyzed by the tests of piercing them into carbon fiber laminated fabrics. The results show(ed) that the measured value of PVA resin volume content of the z-pins (was) slightly larger than the theoretical value. And the z-pin prepared in the molding die with cavity diameter of 0.70 mm (P7) ha(d) the best piercing property. Its resin volume content (was) 45.6%. The maximum compressive stress in the whole piercing process of P7 (was) the lowest compared with the z-pins molded by the other dies, and there (was) little damage to the piercing tip of P7 after penetration. Besides (In addition), it could (be-be should be deleted) at least fully pierce 9 mm thick laminated fabrics. Last sentence: In addition, it could completely pierce laminated fabrics with a minimum thickness of 9 mm. |
2樓2014-08-04 02:26:00
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