Adjustable Guide Roller Peel Test Device for Complex Specimens
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Solution Overview
Problem
Existing peel test devices are not suitable for specimens with complex shapes, such as those with variable curvatures, non-parallel faces, and variable thicknesses, as they cannot maintain a consistent peel angle during testing, making it difficult to compare test results.
Innovation Solution
The peel test device features guide rollers with a local annular external support surface for point connection with the specimen, allowing for adjustable positioning to maintain a consistent peel angle, and includes a flexible cable for secure attachment, enabling the device to accommodate complex specimen geometries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If traditional peel test devices are used on specimens with complex shapes (variable curvatures, non-parallel faces, variable thicknesses), then the device structure remains simple, but the peel angle cannot be maintained consistently during testing
Solution Approach 1:
The guide roller is made adjustable in position along the direction perpendicular to its axis, allowing the device to dynamically adapt to different specimen geometries. This positional adjustment enables the guide roller to accommodate variable curvatures, non-parallel faces, and variable thicknesses while maintaining a consistent peel angle throughout the peeling process.
Solution Approach 2:
The guide roller serves multiple functions: it guides the specimen during peeling, maintains the correct peel angle, and accommodates various complex specimen shapes through its adjustability. This multi-functional design allows a single device configuration to handle diverse specimen types that would otherwise require multiple specialized setups.
2Manufacturing precision
If the guide roller is made adjustable to accommodate complex specimen shapes, then the peel angle consistency is improved, but the device complexity increases
Solution Approach 1:
The guide roller's position is made variable along the direction perpendicular to its axis, allowing adjustment of a single geometric parameter (position) to achieve peel angle consistency across different specimen shapes. This simple parameter change avoids the need for complex multi-degree-of-freedom adjustment mechanisms.
3Adaptability or versatility
If the front roller is made adjustable in the traction direction, then the adaptability to different specimen configurations is improved, but the device complexity increases
Solution Approach 1:
The front roller's position is made adjustable along the traction direction, allowing a single parameter (position along the traction axis) to be varied to accommodate different specimen configurations. This simple linear adjustment provides flexibility without requiring complex multi-dimensional adjustment mechanisms.
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 configuration allows for reliable and comparable peel tests on specimens with complex shapes by ensuring a consistent peel angle and secure attachment, even for specimens derived from blades with non-parallel faces and variable thicknesses.
Implementation Method 1
The cable (84) is looped around the reinforcement (44) between the two plates (44a, 44b) and engaged in the notches (50)
Implementation Method 2
The test specimen is positioned on the two front and guide rollers (16, 18) along its length... while the substrate (28) rolls from the front roller (16) to the guide roller (18)
Implementation Method 3
Between the attachment means (20) and the traction means (22) is interposed a force sensor (24) capable of measuring the traction force exerted between the traction means (22) and the attachment means (20)
Data Source
Figure 1~3
Figure 4
AI summary
The invention relates to a device and a method for peeling tests, for testing the resistance to peeling of coupons (40) each formed of a substrate (42) and an adhesive (44), and comprising a frame (60) with rollers (70, 74) having parallel axes for holding the coupon (40) in abutment whilst guiding its displacement, traction means (76, 78) connected to attachment means (84) which are designed to bring about the lifting of the adhesive off the substrate surface, means (80) of measuring the force exerted by the traction means for pulling the attachment means during the peeling stage, and a complex-shape coupon (40), such as a coupon taken from a reinforced vane. According to the invention, at least one of the rollers (70. 74) can be adjusted in translation relative to the other rollers, and the coupon is prepared especially to facilitate the tests.