Resin Binder Electrical Monitoring for Composite Cure Control
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Solution Overview
Problem
Existing composite systems face challenges in ensuring the structural integrity of composite structures due to defects such as voids or marcel in the cured resin binder, leading to potential failures and the need for extensive examination to verify defect absence.
Innovation Solution
A method and system for electrically monitoring the reactive and physiological behavior of the resin binder during the cure process, using an interdigitated circuit to track temperature-related changes in viscosity and polymerization, allowing for real-time monitoring and feed-forward control of variables like pressure, temperature, and time to optimize resin properties and prevent defects.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If extensive examination is performed to verify defect absence, then reliability is improved, but loss of time increases
Solution Approach 1:
The system performs real-time monitoring of the resin binder during the cure process to detect defects such as voids and marcel as they form, rather than examining the cured structure after manufacturing. This preliminary detection during the curing process eliminates the need for extensive post-manufacturing examination while ensuring structural integrity.
Solution Approach 2:
The system continuously monitors the cure process and provides real-time feedback on resin binder behavior, allowing for immediate detection and correction of defects. This feedback mechanism enables quality control during manufacturing rather than requiring time-consuming post-production examination.
2Manufacturing precision
If real-time monitoring is implemented, then manufacturing precision is improved, but device complexity increases
Solution Approach 1:
The resin binder itself serves as the sensing element by utilizing its own physiological changes (viscosity, temperature, electrical properties) during curing as the measurement signal. This self-service approach eliminates the need for complex external monitoring equipment, achieving real-time monitoring of resin properties through the material's inherent characteristics.
Solution Approach 2:
The system replaces complex mechanical examination methods with electrical and thermal monitoring techniques. By measuring electrical properties and temperature changes during curing, the system achieves precise control of resin properties without requiring complex mechanical inspection equipment.
3Productivity
If feed-forward control is applied, then productivity is improved, but device complexity increases
Solution Approach 1:
The system uses real-time feedback from monitoring resin binder behavior during curing to automatically adjust process parameters such as temperature and pressure. This feedback-driven feed-forward control optimizes the cure process efficiency without requiring complex manual intervention, improving productivity through automated response to measured conditions.
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
This approach enables the production of composite parts with tailored fatigue properties, precision, and consistency, even with resin systems of varying composition, by actively managing the curing process to prevent defects and ensure quality.
Implementation Method 1
electrically monitoring the reactive and physiological behavior of the resin binder in a composite system, so as to develop the desired properties of the resin during the cure process
Implementation Method 2
electrically monitoring the reactive and physiological behavior of the resin binder
Data Source
AI summary
The present application relates to a method and system for optimizing a composite system by electrically monitoring the reactive and physiological behavior of the resin binder in a composite system, so as to develop the desired properties of the resin during the cure process. A method of manufacturing a composite part can include assembling a composite preform with a resinous material and an open circuit. Further, the method can include subjecting the composite preform to a curing cycle so that a resin in the resinous material melts and closes the open circuit. Further, the method can include electrically monitoring a current through the resin during the curing cycle. Further, the method can include selectively controlling a manufacturing variable in response to the step of electrically monitoring the current through the resin.