断裂模式在裂纹应变传感器中的作用

IF 1.5 4区 材料科学 Q3 ENGINEERING, MECHANICAL
Huan Zhao, Xiangbei Liu, Yan Li
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引用次数: 0

摘要

基于裂纹的应变传感器(CBS)受到蜘蛛狭缝器官的启发,可以提供高灵敏度的测量,并具有很大的灵活性。裂缝模式设计是满足不同传感需求的关键。本文建立了一个计算模型,以了解断裂模式对由铂(Pt)导电层和聚二甲基硅氧烷(PDMS)基底层组成的CBS的灵敏度和传感范围的影响。通过机电耦合有限元分析,我们发现单个I型贯通裂纹比其他方向的非贯通裂纹或同一方向的几个离散非贯通裂纹具有更好的传感性能。产生多个I型贯穿裂纹对灵敏度的影响可以忽略不计。然而,增加裂纹的数量可以导致更高的传感范围。当使用相同数量的裂纹时,即使裂纹间距也可以产生最高的传感范围。增加裂纹深度可以有效地提高灵敏度。计算分析的结论可以为CBS在不同应用中的设计和制造提供有用的反馈。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
The Role of Fracture Patterns on Crack-Based Strain Sensors
Crack-based strain sensors (CBS), which are inspired by a spider's slit organ, can provide highly sensitive measurement with great flexibility. Fracture pattern design holds the key to meeting different sensing needs. In this paper, a computational model is developed to understand the role of fracture patterns on sensitivity and sensing range of CBS that consist of a platinum (Pt) conductive layer and a polydimethylsiloxane (PDMS) substrate layer. Through the coupled mechanical-electrical finite element analysis, we found that a single Mode-I through crack can yield better sensing performance than a non-through crack in other orientations or a few discrete non-through cracks in the same orientation. Creating multiple Mode-I through cracks has negligible effect on sensitivity. However, increasing the number of cracks can lead to higher sensing range. When the same number of cracks are employed, even crack spacing can yield the highest sensing range. Sensitivity can be effectively improved by increasing the crack depth. Conclusions from the computational analysis can provide useful feedback for design and manufacturing of CBS in different applications.
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来源期刊
CiteScore
3.00
自引率
0.00%
发文量
30
审稿时长
4.5 months
期刊介绍: Multiscale characterization, modeling, and experiments; High-temperature creep, fatigue, and fracture; Elastic-plastic behavior; Environmental effects on material response, constitutive relations, materials processing, and microstructure mechanical property relationships
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