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There are many circumstances when it is necessary to model contact and contact interactions when analyzing medical implants. Such circumstances arise when devices interact with tooling, catheters, vessels and when self-contact occurs. This latter situation arises for example when a stent is crimped down tightly to catheter dimensions. ABAQUS/Standard provides a range of methods for defining [...] Finite Element Analysis (FEA) can produce an enormous amount of data as output. Solution variables such as stress and strain are computed throughout an analysis for each increment and at each location within the model. These solution variables are computed at what are called “integration points”. These locations ARE NOT the same as the nodes [...] Finite Element Analysis is routinely used to evaluate the performance and durability of medical devices. When using an implicit method such as ABAQUS/Standard, FEA can also be used to evaluate the geometric stability of a proposed design. Such issues could arise for example when designing stents for large vessels, such as the aorta, [...] You can download our presentation where we give results from recent in-vitro tests and advanced finite element analysis simulations as an example of a comprehensive and self-consistent engineering methodology for understanding therapeutic applications of RF tissue ablation. . The mechanical properties of Nitinol stents are normally evaluated experimentally due to complexities resulting from large deformations and material nonlinearity. Despite difficulties associated with Finite Element Analysis (FEA), the success of computational analysis in combination with experimental study leads to better understanding of stent performance. This paper compares experimentally evaluated radial resistive forces of a [...]
You can download a presentation on radiofrequency (RF) ablation of heart tissue which is an effective method for managing atrial fibrillations. I became interested in simulating the effects of RF ablation as early as 1998 when I did some work for St. Jude Medical. What intrigued me about the project was how much fun I [...] |
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