基于CFRC智能特性的三点弯曲梁断裂参数试验研究

Q3 Engineering

水力发电学报 Pub Date : 2008-09-04 DOI:10.1061/40988(323)43

Dian-jun Zhang, Shi-lang Xu

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引用次数: 7

摘要

针对软化过程无稳定模型和Ⅰ断裂模式研究较少的现状，利用CFRC的智能特性实现三点弯曲梁的初始载荷。采用双K判据计算K~(ini)_(IC)和K~(un)_(IC)，可以有效地解释纤维的增韧效果。分析了CFRC的阻力与荷载的相对变化、挠度和CMOD之间的关系，符合洛伦兹拟合，可将CFRC的智能特性用于三点弯曲梁的Ⅰ断裂模式研究。最大荷载前的阻力相对变化曲线可以说明弹性变形、稳定断裂和不稳定断裂三个阶段。

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Experimental Study on Fracture Parameter of Three-Point Bending Beam Based on Smart Properties of CFRC

According to actuality that softening process has no stable model and mode Ⅰ fracture has been investigated rarely,the smart properties of CFRC are utilized to attain the initial load of three-point bending beam.Double-K criterion is used to compute K~(ini)_(IC) and K~(un)_(IC),which can explain the toughening effect of fiber effectually.The smart properties of CFRC can be used to research mode Ⅰ fracture of three-point bending beam after analysis of the relationships between relative variation of resistance and load,deflection and CMOD which accord with Lorentz fit.The curves of relative variation of resistance before maximum load can illustrate three stages of elastic deformation,stable fracture and unstable fracture.

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来源期刊

水力发电学报 Environmental Science-Water Science and Technology

CiteScore

2.90

自引率

0.00%

发文量

4781

期刊介绍：