Measurement on fracture process and prediction of the load capacity of steel fiber reinforced concrete by electronic speckle pattern interferometry

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• 作者：Xiangjun Dai^a ; ^{daixiangjun@sdut.edu.cn"" rel=""nofollow} ; Qi Pu^a ; Limin Wang^b ; Hai Yun^a ; Yanxia Wang^a
• 关键词：A. Fiberes ; B. Fracture ; B. Mechanical properties ; D. Mechanical testing ; ESPI
• 刊名：Composites Part B: Engineering
• 出版年：2011
• 出版时间：July 2011
• 年：2011
• 卷：42
• 期：5
• 页码：1181-1188
• 全文大小：1741 K

文摘

Electronic speckle pattern interferometry (ESPI) was used to measure the fracture process of the steel fiber reinforced concrete (SFRC) specimen with prenotch under three-point bending in this paper. Two kinds of powerful phase measurement techniques, phase shifting method (PSM) and spatial-carrier method (SCM), were described briefly. From the quantitative analysis of ESPI fringes under different load levels, the crack opening displacements (CODs), crack mouth opening displacements (CMODs) and neutral layer positions were obtained. Using the displacement data, the maximum load of the beam was predicted through double-K fracture model.