Earlier Lectures (2021)

Computational mechanics for design of energy technologies (Lecture 17 - May 2021)

Abstract of the lecture

As with most other sciences, computational mechanics has to reconcile with the reality of the new energy and climate mitigation technologies like enhanced geothermal systems and carbon capture and storage. The intellectual capital built up on solving problems in the defense and aerospace sector in the realm of computational mechanics can be put to good use as guiding protocols for the design of these technologies. The talk will focus on specific concepts in computational geometry and fluid structure interaction to enable the solution of large scale carbon capture problems. The second part of the talk will focus on the leverage of deep learning to resolve fundamental physics to later enable the use of data-driven methods.

Fluid Mechanics as a tool in respiratory disease mitigation (Lecture 16 - Feb 2021)

Speaker: Prof. Saikat Basu

Abstract of the lecture

In this webinar, Prof. Saikat will discuss his long-term research program goals to promote fluid mechanics-based analysis as a planning tool that can be readily accessed by physicians to reach personalized clinical decisions for each patient, especially for pathologies related to flow-based transport. In this talk, he will present his research vision on applying tools from theory and computations to answer specific translational questions arising in clinical therapeutics and mitigation, with the current focus being mostly on respiratory physiology. The next 20-30 years will see great activity in how we can use concepts from mechanics and applied physics to answer open questions in clinical domains, through transdisciplinary collaborations between physicians, engineers, applied mathematicians, and pharmacologists.

Related publications

S Basu, Computational characterization of inhaled droplet transport in the upper airway leading to SARS-CoV-2cinfection. medRxiv: the preprint server for health sciences, Cold Spring Harbor Laboratory Press, October 2020. DOI: https://doi.org/10.1101/2020.07.27.20162362
S Basu, LT Holbrook, K Kudlaty, O Fasanmade, J Wu, A Burke, BW Langworthy, M Mamdani, Z Farzal, WD Bennett, JP Fine, BA Senior, AM Zanation, CS Ebert Jr., A Kimple, B Thorp, DO Frank-Ito, GJM Garcia, and JS Kimbell, Numerical evaluation of spray position for improved nasal drug delivery. Scientific Reports, Volume 10, Article number 10568, 2020

Phase field fatigue fracture (Lecture 15 - Jan 2021)

Speaker: Dr. Fadi Aldakheel

Abstract of the lecture

In this webinar, the phase-field PF approach to fracture is extended to model fatigue failure in the high and low cyclic regime. Fatigue is the primary failure mode for more than 90 % of mechanical failures. It occurs when a structure is subjected to repeated loading at stress levels that are below the yield stress of the material. On the modeling side, a local energy accumulation variable which takes the loading history of a structure into account is introduced within the PF formulation. This is inserted into a fatigue degradation function which degrades the fracture material properties. To this end, only one additional parameter is proposed, that enables the reproduction of main material fatigue features.

Related publications

Aldakheel, F.; Schreiber, C.; Müller, R.; Wriggers, P.: Phase-field modeling of fatigue crack propagation in brittle materials. A part of a new Book submitted to Springer (2021).
Seles, K.; Aldakheel, F.; Tonković, Z.; Sorić, J.; Wriggers, P.: A General Phase-Field Model for Fatigue Failure in Brittle and Ductile Solids. Submitted to Computational Mechanics (minor-revision) (2021).
F.; Schreiber, C.; Müller, Aldakheel, F.: Phase Field Modeling of Fatigue Fracture. A part of a new Book submitted to Springer (2021).
Wriggers, P.; Aldakheel, F.; Lohaus, L.; Heist, M.: Water-induced damage mechanisms of cyclically loaded High-performance concretes. Bauingenieur 95 (4), 126–132 (2020).