發(fā)布時間：2018-04-27 04:13

  本文選題：碳纖維 + 熱塑性材料��； 參考：《浙江大學(xué)學(xué)報(工學(xué)版)》2017年09期

【摘要】：為改善熱塑性材料三維打印結(jié)構(gòu)件的力學(xué)性能,并對其所受應(yīng)力應(yīng)變狀態(tài)進(jìn)行實時自監(jiān)測,提出一種連續(xù)碳纖維-熱塑性復(fù)合材料(CFTC)并聯(lián)臂三維打印技術(shù),并基于碳纖維壓阻效應(yīng)開展打印結(jié)構(gòu)自感知特性相關(guān)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(jìn)行強度測試;針對結(jié)構(gòu)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(yīng)變靈敏度均值為3.148,彎曲應(yīng)變靈敏度均值為1.31,線性相關(guān)系數(shù)大于0.94;研究結(jié)果為高強度自感知智能結(jié)構(gòu)件的制造提供了一種新的技術(shù)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(xué)機(jī)械工程學(xué)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(xué)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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