本文選題：碳纖維 + 熱塑性材料��； 參考：《浙江大學學報(工學版)》2017年09期

【摘要】：為改善熱塑性材料三維打印結構件的力學性能,并對其所受應力應變狀態(tài)進行實時自監(jiān)測,提出一種連續(xù)碳纖維-熱塑性復合材料(CFTC)并聯(lián)臂三維打印技術,并基于碳纖維壓阻效應開展打印結構自感知特性相關研究.以東麗T300B-3000-40B連續(xù)碳纖維絲和直徑為1.75mm的聚乳酸(PLA)絲為例,通過實驗確定最優(yōu)打印工藝參數(shù)范圍;制備CFTC試樣并對其進行強度測試;針對結構件常見承載形式,研究CFTC試樣在軸向拉伸和三點彎曲2種狀態(tài)下的自感知特性.三維打印CFTC試樣比純PLA試樣具有更高的強度,最大拉伸強度提高了540%以上;所打印的CFTC試樣具有良好的自感知特性,拉應變靈敏度均值為3.148,彎曲應變靈敏度均值為1.31,線性相關系數(shù)大于0.94;研究結果為高強度自感知智能結構件的制造提供了一種新的技術方法.
[Abstract]:In order to improve the mechanical properties of three dimensional printing structure of thermoplastic materials and to monitor the stress and strain state in real time, a 3D printing technique for continuous carbon fiber / thermoplastic composite material parallel arm is proposed. Based on the Piezoresistive effect of carbon fiber, the self-sensing characteristics of print structure are studied. Taking Toray T300B-3000-40B continuous carbon fiber wire and polylactic acid lactic acid (1.75mm) wire as an example, the optimum printing process parameters range is determined through experiments; the CFTC sample is prepared and its strength is tested; according to the common load-bearing forms of structural parts, The self-sensing properties of CFTC specimens under axial tensile and three-point bending were studied. The maximum tensile strength of 3D printed CFTC specimen is more than 540% higher than that of pure PLA sample, and the printed CFTC sample has good self-sensing property. The mean value of tensile strain sensitivity and bending strain sensitivity are 3.148 and 1.31 respectively, and the linear correlation coefficient is greater than 0.94.The research results provide a new technical method for the manufacture of high-strength self-sensing intelligent structures.
【作者單位】： 浙江大學機械工程學院浙江省三維打印工藝與裝備重點實驗室;
【基金】：國家自然科學基金資助項目(51575483) 浙江省公益基金資助項目(2016C31036)
【分類號】：TB332

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