Multiaxial ratcheting behavior of zirconium alloy tubes under combined cyclic axial load and internal pressure

Chen, G.; Zhang, X.; Xu, Dekang; Li, D.H.; Chen, X.; Zhang, Z.

doi:10.1016/j.jnucmat.2017.03.039

Cited by 18 publications

(1 citation statement)

References 43 publications

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“…It has been reported that the stress conditions, such as mean stress and stress amplitude, have great influence on plastic deformation accumulation. − The effect of mean stress on heterogeneous accumulative local strain of weld joints is investigated by the organic MRL method in Figure . The cyclic tests were carried out at a constant stress amplitude of 240 MPa and a stress rate of 230 MPa/s but with different mean stresses (σ M = 250, 255, and 260 MPa).…”

Section: Resultsmentioning

confidence: 99%

Dynamic Visible Monitoring of Heterogeneous Local Strain Response through an Organic Mechanoresponsive AIE Luminogen

Zhang

Cao

Zhang

et al. 2020

ACS Appl. Mater. Interfaces

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Local strain concentration is critically important for damage formation of structural components. Therefore, it is of particular interest in developing the structural health monitoring (SHM) method for large-scale, full-field, and on-site monitoring of local strain response in complicated structural components in service. The present work investigated a SHM method based on a pure organic mechanoresponsive luminogen (MRL), 1,1,2,2-tetrakis(4-nitrophenyl)ethane, for heterogeneous local strain concentration. Invisible heterogeneous local strain response in complicated weld joints is transformed into visible fluorescence under monotonic tension and cyclic stress loading. The local strain (<15%) calculated by fluorescence intensity has a good agreement with the results obtained by the conventional digital image correlation method, indicating good measurement accuracy of the calibrated organic MRL method. The heterogeneity of local strain in complicated weld joints increases along with elongation and number of stress cycles. Moreover, the higher mean stress and stress amplitude can induce significantly higher accumulated local strain in the relatively soft fusion zone region. Compared with conventional strain measurement methods, the present organic MRL method opens up new possibilities for large-scale, full-field, and on-site monitoring of local strain concentration and damage in complicated structural components.

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Section: Resultsmentioning

confidence: 99%