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Nonlinear Structural Mechanics Modeling

Available On Demand Until January 25, 2019

In this webinar, we will analyze the nonlinear structural behavior of a complex system by making a series of assumptions about its geometry and physical behavior. The goal is to create a mathematical model with the minimum complexity required to produce meaningful simulation results while avoiding the introduction of unnecessary computational costs.

We will build a structural model to inform the design of a blood pressure cuff, which relies on a handheld inflation bulb to generate pressure. The design of this bulb must balance material properties and dimensions so that the bulb can generate sufficient internal pressure when subjected to a compressive radial load by a clinician’s hand.

The webinar will touch on interesting effects in the model, including:
   • Hyperelastic materials
   • Materials with user-defined anisotropic stiffness
   • Explicit boundary selections to speed up meshing, probing, and contact pair definitions
   • Contact mechanics with friction
   • Modeling of gas compression through a boundary load defined by a mathematical function
   • Load ramping to aid the convergence of a quasistatic analysis

The webinar includes a live demo in the COMSOL Multiphysics® software and a Q&A session.

Numerical simulation results showing the von Mises stress distribution in a handheld inflation bulb.


Lawrence Smith, Triple Ring Technologies

Lawrence Smith contracts as a mechanical engineer at Triple Ring Technologies in Newark, CA. He has contributed to medical device development projects in all stages of the product life cycle, ranging from the proof-of-concept prototype design to work on high-volume commercial drug delivery systems. He has a special interest in tackling heat transfer, structural mechanics, and fluid dynamics problems using numerical modeling methods. Lawrence holds a BS in mechanical engineering with a concentration in mechatronics from California Polytechnic State University, and is currently earning his MS in mechanical engineering from CU Boulder, with a focus on design.

Temesgen Kindo, COMSOL

Temesgen Kindo works at COMSOL as an applications engineer, specializing in structural mechanics and equation-based modeling. Before joining the Burlington, MA office, Temesgen received his PhD in civil engineering from Duke University. He is interested in nonlinear mechanics, multiphysics problems, and applied mathematics.

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