Question: How is the Yielding Process taking compensation into account in the determination of the cutting patterns?
Answer:
The planarization process in the RF-CUTTING-PATTERN module is an iterative process that levels the respective cutting regions by minimizing the distortion energy assuming an assigned material behavior.
Simplified, the method compresses the initial geometry in a press under the assumption of a friction-free contact until the stresses from the flattening are in equilibrium with each other.
→ See Video
As this process covers the complete mechanical system of the curved structural component, you can additionally consider the compensation directly as a applied strain load.
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Since the strains from the compensation specification interact with the strains from the planarization in the RF-CUTTING-PATTERN Algorithm, this type of compensation consideration is not to be compared with the usual, planar scaling of uncompensated blanks. The consideration of the complete "cutting mechanism" with all strain terms promises a very high-quality geometry.
Before the flattening, the integral flattening process defines a coordinate system (warp and weft direction) from the mean orientation of the FE elements and uses the initially defined coordinate system to describe the compensation strain and stiffness, independent of the respective position of the FE elements in the coordinate system orientation. Thus, the comparison shown in the video is only valid for an isotropic linear elastic membrane model.
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Keywords:
#Cutting #Energy #Minimum #Quality #Precamber #Compensation #Relaxation
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