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用于从纤维-基质界面收集数据的微尺度传感器解决方案。

Microscale sensor solution for data collection from fibre-matrix interfaces.

机构信息

Faculty of Engineering and Natural Sciences, Tampere University, PO Box 589, 33014, Tampere, Finland.

Instituto de Telecomunicações, PO Box 3810-193, Aveiro, Portugal.

出版信息

Sci Rep. 2021 Apr 16;11(1):8346. doi: 10.1038/s41598-021-87723-9.

DOI:10.1038/s41598-021-87723-9
PMID:33863949
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC8052447/
Abstract

Especially the applications of fibrous composites in miniature products, dental and other medical applications require accurate data of microscale mechanics. The characterization of adhesion between single filament and picoliter-scale polymer matrix usually relies on the experiments using so-called microbond (MB) testing. The traditional MB test systems provide unitary data output (i.e., converted force) which is enigmatic in resolving the fracture parameters of multi-mode interface cracks. As a fundamental basis, the momentary reaction force and respective local strain at the location of a non-ambiguous gradient are needed for a mechanical analysis. In this paper, a monolithic compliant based structure with an integrated Fiber Bragg Grating (FBG) sensor is developed and analysed. The stiffness of the compliant structure is estimated by using mathematical and finite element (FE) models. Qualification experiments are carried out to confirm the functional performance: MB testing of synthetic (carbon and glass) and natural (flax) single filaments are successfully performed. Quasi-static and dynamic analysis of the MB testing is carried out by using the FE method to interpret the response of the compliant structure. The developed strain-sensing CBPM-FBG holder shows excellent sensitivity during the MB tests for both synthetic and natural filaments, even at a low filament diameters as low as [Formula: see text], making the monolithic compliant structure the first instrument capable of force-strain data output for bonded filament-droplet specimens.

摘要

特别是纤维复合材料在微型产品、牙科和其他医学应用中的应用，需要微尺度力学的精确数据。单丝和皮升级聚合物基体之间的粘附特性通常依赖于所谓的微键合 (MB) 测试的实验。传统的 MB 测试系统提供单一的数据输出（即转换力），在解析多模式界面裂纹的断裂参数时，这种数据输出是神秘的。作为一个基本依据，在明确的梯度位置需要瞬时反作用力和各自的局部应变，以便进行力学分析。本文开发并分析了一种具有集成光纤布拉格光栅 (FBG) 传感器的整体柔顺结构。使用数学和有限元 (FE) 模型来估计柔顺结构的刚度。进行了资格认证实验以确认功能性能：成功地进行了合成（碳和玻璃）和天然（亚麻）单丝的 MB 测试。通过使用 FE 方法对 MB 测试进行准静态和动态分析，以解释柔顺结构的响应。所开发的应变传感 CBPM-FBG 固定器在 MB 测试中表现出优异的灵敏度，即使在低纤维直径低至[公式：见文本]的情况下，对于合成和天然纤维都是如此，这使得整体柔顺结构成为第一个能够为键合纤维液滴样品输出力-应变数据的仪器。

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