Elastic Material Evaluation Using Strain-Induced Void Volume Change
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Solution Overview
Problem
Existing methods for evaluating the performance of elastic materials, such as rubber or elastomers, do not accurately predict the performance of actual products using these materials.
Innovation Solution
A performance evaluation method that involves applying strain to a test piece of elastic material to form low-density portions, obtaining X-ray projected images at two different times, identifying and measuring the volume change of these portions, and using the volume change as an indicator of material performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If conventional evaluation methods (indoor wear tester, X-ray density measurement) are used to evaluate elastic material performance, then the evaluation process can be completed, but the performance results do not match the actual product performance
Solution Approach 1:
The invention changes the evaluation parameter from general density measurement to specifically measuring the volume change of low-density portions (voids) within the elastic material. By applying strain to form controlled low-density regions and then measuring their volume change over time, the method establishes a parameter that directly correlates with actual product performance, resolving the mismatch between laboratory evaluation and real-world performance
Solution Approach 2:
The invention performs preliminary action by applying strain to the test piece before X-ray measurement to intentionally form low-density portions (voids) within the material structure. This preliminary straining step creates the specific structural features (voids) that will then be measured to evaluate performance, allowing the evaluation to predict actual product behavior under service conditions
2Reliability
If strain is applied to form voids and measure volume change over time, then performance prediction accuracy improves, but the evaluation process complexity increases
Solution Approach 1:
The invention replaces complex mechanical wear testing with X-ray computed tomography measurement. Instead of using indoor wear testers that require complex mechanical setups and long testing periods, the method uses non-contact X-ray imaging to measure void volume changes, significantly simplifying the evaluation system while improving prediction accuracy
Solution Approach 2:
The invention creates a virtual copy of the material's internal structure through X-ray computed tomography imaging. By generating 3D images of the void distribution and measuring volume changes in this digital replica, the method avoids the need for complex physical testing apparatus while accurately capturing the material's performance characteristics
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 method allows for a more accurate prediction of the performance of elastic materials by evaluating the volume change of low-density portions, which correlates with the material's structural integrity and wear resistance, enabling the production of high-performance products.
Implementation Method 1
a step of obtaining projected images of the test piece by irradiating the test piece with X-rays at a predetermined first time and at a second time after the first time
Data Source
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AI summary
A performance evaluation method for elastic material including rubber or elastomer, the method includes: a step of applying a strain to a test piece made of an elastic material to form at least one low-density portion inside the test piece; after forming the low-density portion, a step of obtaining projected images of the test piece by irradiating the test piece with X-rays at a predetermined first time and at a second time after the first time; a step of identifying the low-density portion based on the projected images at the first time; a step of identifying the low-density portion based on the projected images at the second time; a step of identifying a volume change of the at least one low-density portion between the first time and the second time; and a step of outputting the volume change as one of indicators of performance of the elastic material.