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Stress relaxation and performance tests of a steerable catheter for QLV beam modeling
- Citation Author(s):
- Submitted by:
- Jajun Ryu
- Last updated:
- Sun, 01/05/2025 - 04:02
- DOI:
- 10.21227/skvv-qv36
- License:
20 Views- Categories:
- Keywords:
Abstract
This dataset includes stress relaxation and performance test results conducted on a steerable catheter to evaluate and validate its viscoelastic properties using a quasilinear viscoelastic (QLV) beam model. Both datasets consist of raw bending moment measurements from a load cell and processed curvature data derived from stereo images.
The relaxation test data provides insights into viscoelastic behavior by illustrating the relationship between moment and curvature across multiple loading levels. This data is used to identify the parameters of the QLV beam model.
The performance test data consists of random deformation patterns and is used to validate the identified QLV beam model.
This dataset supports research aimed at enhancing tip positioning accuracy in steerable catheters for minimally invasive surgeries and advancing viscoelastic material modeling.
The stress relaxation test data includes two files: Stress_Relaxation_Curvature_Data.xlsx and Stress_Relaxation_Moment_Data.xlsx. The curvature data is used as the input to the QLV equations, while the moment data serves as the target for curve fitting. By fitting the moment data to the QLV equations using the curvature input, the optimal QLV model parameters are identified. These parameters characterize the viscoelastic behavior of the catheter’s proximal and distal segments, including relaxation constants and nonlinear elastic responses. This step is critical for accurately modeling the catheter’s bending behavior under time-dependent loading conditions.
Note that the starting time for each loading level in the relaxation tests differs slightly to match the number of data points.
The performance test data, provided in Performance_Test_Curvature_Data.xlsx and Performance_Test_Moment_Data.xlsx, evaluates the QLV model’s ability to predict the catheter tip’s position during random deformations. The moment data is used to simulate the curvature response of the catheter, which is then compared against the measured curvature data. The simulated curvature is further used to calculate the catheter tip's position, enabling a direct comparison between experimental and simulated tip trajectories. This process validates the QLV model's accuracy in real-world scenarios, ensuring its applicability in minimally invasive surgical procedures.
