Three-dimensional SPH modeling of brittle fracture under hydrodynamic loading

TL;DR

This paper introduces a 3D SPH computational framework combining fluid-structure interaction modeling with structural failure simulation, enabling detailed crack surface prediction without complex crack-tracking algorithms.

Contribution

The novel integration of weakly compressible SPH with a pseudo-spring damage model allows for accurate, efficient 3D fracture simulation under hydrodynamic loading without specialized crack-tracking.

Findings

Accurately predicts 3D crack surfaces in structures.

Demonstrates high accuracy against experimental data.

Effective in simulating complex fracture patterns.

Abstract

A three-dimensional SPH computational framework is presented for modeling fluid-structure interactions with structural deformation and failure. We combine weakly compressible SPH with a pseudo-spring-based SPH solver to capture the fluid flow and deformable structures. A unified modeling approach captures the solid boundaries and fluid-structure interfaces without penalty-based contact force. The $\delta$-SPH technique improves the pressure calculations in the fluid phase, while structural damage is modeled using a pseudo-spring approach, with particle interactions limited to its neighbors. The present framework can capture the three-dimensional crack surfaces in structures without any computationally intensive crack-tracking algorithm or visibility criteria. The framework has been proven effective against existing models and experimental data, demonstrating high accuracy and robustness in simulating detailed fracture patterns and offering insights into the impact of hydrodynamic events on structural integrity.