X-ray scatter detection for incipient heat damage in composites
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Solution Overview
Problem
Current methods, such as ultrasonic and infrared spectroscopy, are ineffective in detecting incipient heat damage within composite structures, like aircraft components, as they either focus on surface variations or fail to detect internal changes until significant damage occurs.
Innovation Solution
An X-ray scatter system and method that generates calibration data from test structures, emits X-ray radiation, detects X-ray scatter, and determines thermal and mechanical properties by associating differences in density with heat-induced variations, allowing for the detection of incipient heat damage before it reaches undesirable levels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If ultrasonic methods are used for nondestructive inspection, then internal variations within the structure can be detected, but the detection occurs only after significant damage has already happened
Solution Approach 1:
The patent changes the physical parameter used for detection from ultrasonic wave propagation (which detects only significant structural changes) to X-ray scattering properties (which detect incipient molecular-level changes in polymeric bonds). By measuring changes in X-ray scattering patterns caused by alterations in bond density and molecular structure, the system detects heat damage at its earliest stages before it progresses to significant structural variation.
2Measurement precision
If infrared spectroscopy is used to detect variations, then surface variations can be detected, but internal variations within the structure remain undetected
Solution Approach 1:
The patent creates a multi-functional inspection system that uses X-ray scattering to simultaneously detect both surface and internal variations. The X-ray scatter measurement technique is universally applicable to both surface-level and subsurface features, eliminating the need for separate inspection methods. The system measures scattering patterns that contain information about both surface conditions and internal molecular structure, providing comprehensive structural assessment in a single measurement.
3Ease of operation
If conventional NDI techniques are used for composite structures, then inspection can be performed, but incipient heat variations cannot be detected
Solution Approach 1:
The patent replaces conventional mechanical-based NDI techniques (ultrasonic, tactile inspection) with an electromagnetic radiation-based system. X-ray scattering interacts with the electronic structure and molecular bonds of the material, providing sensitivity to incipient thermal changes that mechanical methods cannot detect. The substitution of the detection mechanism enables measurement of bond-level changes before they manifest as macroscopic structural variations.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables the precise detection and mapping of internal structural variations, including incipient heat damage, within composite structures, facilitating early intervention and accurate repair planning.
Implementation Method 1
emitting X-ray radiation into the structure
Implementation Method 2
detecting X-ray scatter from the structure
Data Source
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AI summary
Embodiments of the present disclosure provide systems (100) and methods (300) for detecting one or more thermal and/or mechanical properties of a structure (112). The method may include forming one or more test structures (120) from a material (122) that forms the structure, generating and storing (302) calibration data determined from the one or more test structures, emitting X-ray radiation into the structure, detecting (306) X-ray scatter (116) from the structure, and determining the one or more properties of the structure based on the detected X-ray scatter and the calibration data.