40. new meshfree simulation techniques for modeling penetration and blast loading

Department: Structural Engineering
Research Institute Affiliation: Agile Center for Extreme Events Research (CEER)
Faculty Advisor(s): Jiun-Shyan Chen
Award(s): Honorable Mention

Primary Student
Name: Marco Pasetto
Email: mpasetto@ucsd.edu
Phone: 917-982-6012
Grad Year: 2018

Student Collaborators
Frank Beckwith, fbeckwit@eng.ucsd.edu | Tsung-Hui Huang, tsunghuihuang@gmail.com | Mathew Reynolds, mpreynol@eng.ucsd.edu

Structures withstanding extreme loads such as impact and blast are of increasing importance for homeland security. Numerical methods that are accurate and robust can facilitate advancement in the design and assessment of affected structures. Such methods need to be able to capture the key phenomena including large deformations, material fragmentation and shock wave propagations, while being stable and efficient. To achieve this a shock hydrodynamic formulation has been developed under the semi-Lagrangian meshfree Reproducing Kernel Particle Method (RKPM) framework in which shock physics are introduced by a proposed node-based Riemann solver with micro-crack informed damage considered. Under the new framework, pressure oscillations due to shock loading are eliminated, which prevents non-physical damage and premature failure. The performance of the proposed formulation and its capability of modeling blast loading and extreme events are verified through several examples and a suite of benchmark problems.

Industry Application Area(s)
Aerospace, Defense, Security | Civil/Structural Engineering

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