Anthropomorphic flexible joint design and simulation

Chen, Zhuoyuan; Wang, Shaoping; Zhang, Chao; Zhang, Pengyu; Liao, Zirui

doi:10.1109/iciea48937.2020.9248183

Cited by 1 publication

(3 citation statements)

References 17 publications

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“…For case (b), where the flat surfaces were positioned with a spacing of 18mm, the applied load against one surface was shown to increase and decrease in response to pressurization only above the 310 mmHg threshold, when the dilator was rapidly expanding. The maximum load against the flat surface was observed to be 1.2 N. [9][10][11]. Figure 7a shows the von Mises Stress distribution as the proposed dilator is being expanded and Figure 7b shows results for simulated expansion with respect to pressure for each of the material models used.…”

Section: A Experimental Resultsmentioning

confidence: 99%

“…Approximately 30,000 4-node tetrahedron elements were used to mesh the model. Mooney-Rivlin hyperelastic material models from [9][10][11] were implemented for comparison and a final model was chosen by fitting the expansion experimental results to the finite element simulation output, similar to the approach proposed by Gopesh et al [9]. The best fit Mooney-Rivlin coefficients were found to be C01 = 70 kPa and C10 = 0.258 kPa.…”

Section: A Dilator Designmentioning

confidence: 99%

“…Numerical Results: Finite element simulations complement the experimental study by similarly exploring the relationships between (a) von Mises Stress during expansion, (b) dilator pressure and expansion, as well as (c) pressure and applied load against rigid flat surfaces. Three Mooney-Rivlin models for DragonSkin 10 TM have been proposed in the literature with very different coefficients[9][10][11]. Figure7ashows the von Mises Stress distribution as the proposed dilator is being expanded and Figure7bshows results for simulated expansion with respect to pressure for each of the material models used.…”

mentioning

confidence: 99%

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Design and Validation of an Automated Dilator Prototype for the Treatment of Radiation Induced Vaginal Injury

Simoes-Torigoe

Chen

et al. 2021

2021 43rd Annual International Conference of the IEEE Engineering in Medicine &Amp; Biology Society (EMBC)

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Vaginal stenosis (VS) is a common late complication of radiation injury caused by cervical cancer radiotherapy. It is characterized by the narrowing or shortening of the vaginal canal, which is often detrimental to patient quality of life. To address this public health problem, an expandable vaginal dilator was designed for the prevention of VS in cervical cancer survivors. Modeling and benchtop experimentation were used to iteratively characterize the relationship among dilator pressure, expansion, and the load applied to the simulated vaginal wall. Both experimental and simulation results exhibited shared trends relating pressure, dilator expansion, applied load, and resultant displacement of the modeled vaginal walls. Future work will incorporate enhanced Mooney-Rivlin material assumptions and validation of the model with in vivo tests. Clinical Relevance-These results present a design opportunity and treatment paradigm shift to increase patient adherence to VS treatment after cervical cancer radiotherapy. Specifically, gradual expansion of the vaginal dilator increases comfort during the expansion of the vagina, while monitoring the dilator pressure enables the tracking of VS improvement and normalization of vaginal wall compliance.

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Section: A Experimental Resultsmentioning

confidence: 99%