Thank you very much to all presenters at the RUES seminar. In particular to Kostya and our visiting Professor Karol Miller from Western Australia.
Challenges for Computational Biomechanics for Medicine
Mathematical modelling and computer simulation have proved tremendously successful in engineering. One of the greatest challenges for mechanists is to extend the success of computational mechanics to fields outside traditional engineering, in particular to biology, biomedical sciences, and medicine. By extending the surgeon’s ability to plan and carry out surgical interventions more accurately and with less trauma, Computer-Integrated Surgery (CIS) systems could help to improve clinical outcomes and the efficiency of health care delivery. CIS systems could have a similar impact on surgery to that long since realized in Computer-Integrated Manufacturing (CIM). However, before this vision can be realised the following four challenges must be met:
- Challenge 1. Efficient generation of computational grids from medical images of human organs.
- Challenge 2. Real-time (or near-real-time) computations on commodity hardware.
- Challenge 3. Real-time simulation of cutting, damage and propagation of discontinuities.
- Challenge 4. Mathematical formulations that are weakly sensitive to uncertainties in mechanical properties of tissues.In this lecture I describe how the Intelligent Systems for Medicine Laboratory addresses these challenges by using explicit dynamics and dynamic relaxation algorithms implemented on GPU and developing a concept of an “image as a model”.
Link to the presentation:
Effective Shear Stud Strength of Plastic Design of Composite Beams
A composite beam unites a concrete slab and a steel beam to a single load bearing cross-section. To achieve the composite action between concrete slab and steel beam, headed shear studs are welded on top of the steel beam and enclosed in the concrete slab. A numerical model to analyse the non-linear behaviour of composite beams is presented. The model was used to conduct a parametric study on the load-bearing behaviour of composite beams, considering the observed behaviour of headed shear studs in push-out tests. The results of non-linear simulation are compared to calculations according to EN 1994-1-1, considering the shear stud resistance identified in push-out tests. The comparison shows, that in plastic design a reduction of the identified resistance of the studs is necessary to consider the distribution of the slip along the span of the beam.
Analytical Modelling of a Cutting Instrument/Tissue Interaction in Minimally Invasive Surgery: Non-trivial Issues
Link to the presentation: