A brittle material optical element laser damage evaluation method considering stress concentration
By establishing a laser damage assessment method for brittle material optical elements that takes stress concentration into account, the error problem of traditional assessment methods has been solved, achieving high-precision laser damage assessment and improving the strike accuracy of laser weapons and the lightweighting of the system.
CN116183167BActive Publication Date: 2026-07-24SOUTH WEST INST OF TECHN PHYSICS
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Patent Information
- Application Number
- CN202211707676.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-12-29
- Publication Date
- 2026-07-24
- Estimated Expiration
- 2042-12-29
AI Technical Summary
Technical Problem
Existing technologies are insufficient to accurately assess the laser damage state of optical components made of brittle materials. Traditional methods have significant errors and do not consider the impact of internal stress concentration on failure.
Method used
By calculating the maximum local stress inside the component and combining optical and thermodynamic theories, a simulation model is established to evaluate the failure state of the optical component and consider the impact of stress concentration on brittle materials.
Benefits of technology
It has achieved high-confidence laser damage assessment, improved the accuracy of laser weapon systems in striking different targets, and promoted the lightweighting and miniaturization of laser weapon systems.
✦ Generated by Eureka AI based on patent content.
Abstract
The application discloses a kind of brittle material optical element laser damage evaluation method considering stress concentration, it includes the following steps: determining strong laser irradiation target target material element type, obtains material fracture strength parameter;Microscope is used to detect the surface or subsurface defect point topography and size of optical element, obtains the transverse size w and longitudinal size d of defect point;Determine target laser power density, and determine laser wavelength and irradiation time, for pulsed laser, further determine pulse width and frequency;Based on optical and thermodynamic theory, establish the simulation model of defect structure induced optical material internal stress concentration, comparative analysis the stress caused by defect structure of different shape and size in laser action area;Select the maximum value of material internal stress and material fracture strength parameter comparison, according to brittle material fracture criterion, judge the element damage failure state under the irradiation of this laser parameter.The method of the application is reliable and has strong guidance.
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