Asymptotic methods and their applications in nonlinear fracture mechanics: a review

Степанова, Л. В.

doi:10.1088/1742-6596/1096/1/012058

Cited by 2 publications

(1 citation statement)

References 43 publications

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“…The fracture parameter, known as the J ‐integral, was determined from both

\varepsilon _{\rm{e}}^{{\rm{ML}}}

(Figure 5c) and

\varepsilon _{\rm{e}}^{{\rm{DIC}}}

(Figure 5d) using the HRR near‐tip singularity solution. [ 32–35 ] The HRR near‐tip singularity solution can determine the J ‐integral from the effective strain field or from the separate strain field components, whereas the line integral method would require strain components as well as the effective strain. Because the ML field can only be mapped to an effective strain field, the HRR near‐tip singularity solution is a more suitable method to determine the J ‐integral from the ML field.…”

Section: Resultsmentioning

confidence: 99%

Digital Image Correlation Compatible Mechanoluminescent Skin for Structural Health Monitoring

et al. 2022

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Monitoring structural health using mechanoluminescent (ML) effects is widely considered as a potential full‐field and direct visualizing optical method with high spatial and temporal resolution and simple setup in a noncontact manner. The challenges and uncertainties in the mapping of ML field to effective strain field, however, tend to limit significant commercial ML applications for structural health monitoring systems. Here, however, quantification problems are resolved using the digital image correlation (DIC) method. Specifically, an image containing mechanically induced photon information is processed using a DIC algorithm to measure the strain field components, which enables the establishment of a calibration curve when the ML field is mapped onto the effective strain field using pixel level information. The results show a linear relationship between effective strain and ML intensity despite the plastic flow in ML skin. Furthermore, the calibration curve allows for easy conversion of ML field to effective‐strain field at the crack‐tip plastic zone of the alloy structure, retaining its spatial resolution. The compatibility of ML skin with the DIC algorithm not only enables the quantification of the ML effects of several organic/inorganic ML materials, but may also be useful in elucidating the fundamentals of the trap‐controlled mechanism.

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“…The fracture parameter, known as the J ‐integral, was determined from both