压阻效应
水泥
材料科学
标度系数
非线性系统
复合材料
弯曲
应变计
张力(地质)
结构工程
胶凝的
碳纳米管
复合数
韧性
电阻和电导
压力(语言学)
压缩(物理)
工程类
制作
替代医学
哲学
病理
物理
医学
量子力学
语言学
作者
Qinghua Li,Chaokun Hong,Huaqing Xie,Haoxin Lai,Yongrong Shen,Sheng Xu,Paul Y.L. Kong
标识
DOI:10.1016/j.compositesa.2023.107786
摘要
Self-sensing cement sensors detect stress/strain by measuring the fractional change in electrical resistivity. However, neglecting the nonlinear portion of the FCR-stress/strain curves may limit monitoring range. Existing functional models lack versatility and physical meanings of parameters. A new model based on Ramberg-Osgood relation, incorporating the gauge factor, fractional change in resistance, and strain was proposed to cover linear and nonlinear regions. To validate the model, compression and tension cement sensors made of ultra-high toughness cementitious composite and multi-walled carbon nanotubes were tested. Results from various types of cement-based sensors validated the model's versatility. A four-point bending test on a C70 steel-reinforced concrete beam with an embedded cement sensor confirmed the feasibility of the proposed functional model.
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