Peeling Test Coupon With Split Reinforcement Plates
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Solution Overview
Problem
Conventional peel test devices are not suitable for specimens with complex shapes, such as variable curvatures, non-parallel faces, and variable thicknesses, as they cannot maintain a consistent peel angle, making it difficult to perform comparable tests.
Innovation Solution
A peel test specimen with a vane design featuring a blade portion and reinforcement, where the reinforcement is split into two plates with attachment means, allowing for adjustable roller positioning to maintain a consistent peel angle and orientation, and using guide rollers with annular bearing surfaces for stable support.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional peel test devices are used on specimens with complex shapes, then the test can be performed, but the peel angle cannot be maintained consistently
Solution Approach 1:
The invention employs adjustable rollers that can be positioned dynamically to accommodate varying specimen geometries. The rollers are movable along guides, allowing the test setup to adapt to different specimen shapes while maintaining a consistent peel angle through adjustable positioning rather than fixed geometry.
Solution Approach 2:
The invention changes the parameters of the testing apparatus by making the rollers adjustable in position and orientation. This allows the peel angle and roller spacing to be modified according to the specific specimen geometry, enabling consistent testing across diverse specimen shapes by optimizing parameters for each case.
2Device complexity
If fixed roller positioning is used, then the device structure is simple, but it cannot accommodate specimens with variable curvatures and thicknesses
Solution Approach 1:
The rollers are designed with adjustable positioning mechanisms that allow them to be moved along guides and repositioned according to the specimen geometry. This dynamic adjustment capability enables the same device to handle specimens with variable curvatures, thicknesses, and shapes without requiring multiple specialized fixtures.
Solution Approach 2:
The invention creates a universal testing apparatus where the adjustable rollers can accommodate multiple specimen types and geometries. The same device structure serves multiple functions by adjusting roller positions, making it versatile for testing various adhesive bonds on differently shaped specimens while maintaining structural simplicity.
3Adaptability or versatility
If the peel angle varies for different specimens, then complex shapes can be tested, but the test results are not comparable
Solution Approach 1:
The invention allows the peel angle to be adjusted as a controllable parameter for each specimen type. By deliberately setting and maintaining a consistent peel angle through adjustable roller positioning, the test ensures comparable results across different specimens while still accommodating various shapes, thus resolving the contradiction between adaptability and measurement precision.
Data Source
Figure 1~3
Figure 4
AI summary
The invention relates to a coupon (40) which can be suitable for peeling tests and is taken from a vane, the coupon comprising: a blade portion (42) which comprises a pressure-side surface (42a), a suction-side surface (42b), and a leading and/or trailing edge (46), and a vane reinforcement (44) which covers and adheres to at least part of the pressure-side surface, a part of the suction-side surface, and extends beyond the leading and/or trailing edge. According to the invention, the reinforcement (44) is split over the entire length of the leading and/or trailing edge (46), such that the reinforcement is separated into two plates (44a, 44b) which are distinct from and opposite one another on either side of the slit (48) beyond the leading and/or trailing edge. In addition, at least one of the plates has, beyond the leading and/or trailing edge, attachment means (50, 52) providing this part with a hold.