Mini-symposium S1

S1: Computational Frameworks For Large Strain Solid Mechanics and Coupled Problems

Co-chairs: 

Chun Hean Lee (University of Glasgow)*; Antonio Gil (Swansea University); Paulo R. Refachinho de Campos (Swansea University); Eky Febrianto (University of Glasgow)

Key words: Fast Dynamics, Shocks, Dynamic Contact, Dynamic Fracture, Coupled Physics

ABSTRACT

Traditional solid dynamics frameworks face several well-documented challenges in simulating multi-physics solids undergoing large deformations at (fast) dynamic loading rates [1], such as in scenarios involving contact-impact and fracture. These challenges include handling large evolving interfaces, multi-material interfaces, phase changes, and the propagation of discontinuities. In addition, practitioners often contend with numerical issues such as pressure checkerboarding, shear and/or volumetric locking, and inadequate resolution for strains and stresses. Recent literature introduces several implementable approaches in solid mechanics solvers designed to mitigate, if not eliminate, these problems without relying on ad-hoc methods that may compromise fundamental physical principles. Despite these advancements, there remains a pressing need to continue developing new computational techniques to address the unique challenges associated with large deformation problems [2,3]. Several emerging ideas are currently being explored across various research groups. The objective of this MS is to gather researchers from different teams to discuss these challenges. The aim is to develop numerically convergent solutions with high predictive fidelity for systems experiencing large strain solid dynamics. Relevant problem domains may include, but are not limited to, impact mechanics and fracture modelling. 

Contributions that explore the interaction between solids and fluids, as well as multi-physical aspects such as thermo-mechanics and electro-magneto-mechanics, are also encouraged. Industry applications are particularly welcome, as they offer valuable insights into practical challenges and solution implementation.

REFERENCES

[1] Di Giusto T. B. J., Lee C.H., Gil A.J., Bonet J., Wood C., Giacomini M., A first-order hyperbolic ALE conservation formulation for nonlinear solid dynamics in irreversible processes, Journal of Computational Physics, Vol. 518, 113322, 2024.

[2] Wiragunarsa I. M., Zuhal L. R., Dirgantara T., Putra I.S., Febrianto E., Total Lagrangian SPH with an improved bond-based deformation gradient for large strain solid dynamics, Journal of Computational Physics, Vol. 518, 113309, 2024.

[3] de Campos P.R.R., Lee C.H., Gil A. J., Giacomini M., Bonet J., A new Updated Reference Lagrangian SPH algorithm for isothermal elasticity and elasto-plasticity, Computer Methods in Applied Mechanics and Engineering, Vol. 392, 114680, 2022.