非接触式激光测微法测定炭纤维单丝拉伸应变及模量

发布时间：2018-01-16 14:02

本文关键词：非接触式激光测微法测定炭纤维单丝拉伸应变及模量　出处：《湖南大学学报(自然科学版)》2017年06期 　论文类型：期刊论文

【摘要】：本研究在常规强伸仪上引入了非接触式激光测微模块直接测量单丝炭纤维拉伸时标记物的微小位移,使得新测试系统可以同时准确地测量炭纤维单丝的强度、模量和断裂应变,而无需常规方法中复杂的系统校正.通过对炭纤维T300试样的测试可知,激光测微法的准确性和稳定性优于常规测试方法,并且能清晰地检测到炭纤维在受力过程中存在的非虎克行为.结果表明,激光测微法中标记物作为纤维变形的载体成为准确测量的关键标记,应选择有较好遮光性的材料并且垂直于纤维轴粘贴,标记的测量边最好为线性,在保证一定测量范围的前提下尽可能减小标记尺寸.
[Abstract]:In this study, a non-contact laser micrometer was introduced to measure the tiny displacement of the marker during the stretching of monofilament carbon fiber, so that the new measuring system could accurately measure the strength of carbon fiber monofilament simultaneously. Modulus and fracture strain without complicated systematic correction in conventional method. The accuracy and stability of laser micrometer method is better than that of conventional method through testing carbon fiber T300 specimen. And the non-Hook behavior of carbon fiber in the process of loading can be clearly detected. The results show that the label as the carrier of fiber deformation is the key mark for accurate measurement in laser micrometer. Better shading material should be selected and pasted perpendicular to the fiber axis. The measuring edge of the marking should be linear and the marking size should be reduced as far as possible under the premise of a certain measuring range.
【作者单位】：湖南大学材料科学与工程学院;湖南大学汽车车身先进设计制造国家重点实验室;
【基金】：中央高校基本科研业务费专项资金资助项目(531107022124) 湖南大学汽车车身先进设计制造国家重点实验室课题(734215002)~~
【分类号】：TN249;TQ342.742
【正文快照】： 炭纤维具有轻质、高强、高模、高导热、高导电、低热膨胀等一系列特性,被广泛用于航天、航空、运动器材、高档工业产品等领域.精确测量炭纤维的力学性能是研究其结构与性能的基础,目前,炭纤维的力学性能可以通过束丝或者单丝拉伸获得,束丝测试虽然简单、方便,但束丝测试结果是

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