Air-coupled ultrasonic plane stress detection method for composite material based on dual-modal sound-time ratios of lamb wave
US12379348B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 1, 2023 |
| Grant date | Aug 5, 2025 |
| Priority date | — |
| Expiry date | Jan 31, 2044 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/00
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An air-coupled ultrasonic plane stress detection method for a composite material based on dual-modal sound-time ratios of a Lamb wave includes: S1: assembling a detection device; S2: based on the detection device and the dual-modal sound-time ratios of the Lamb wave in S1, using unidirectionally loaded stress to obtain different stress coefficient relations; S3: based on the stress coefficient relations in S2, solving stress coefficients; S4: based on the stress coefficients in S3, acquiring three sound-time ratios; S5: based on the sound-time ratios in S4, describing a stress state of a detection point; and S6: repeating S4 and S5 till completing detection and scanning. The method improves the accuracy of stress coefficient calibration and air-coupled ultrasonic stress representation of a composite material panel greatly.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.