Discrete Element Modeling of Concrete Under Dynamic Tensile Loading
Ahmad Omar, Laurent Daudeville
TL;DR
This paper introduces a 3D discrete element model to simulate how concrete behaves under high-speed tensile forces, validated through experiments on spalling.
Contribution
A novel discrete element model with strain-rate-dependent cohesive laws for simulating concrete under dynamic tensile loading.
Findings
The model accurately reproduces rear-face velocity profiles and failure characteristics in spalling tests.
The discrete element method is validated for dynamic tensile loading at strain rates of 30–115 s−1.
The model shows robust performance when combined with prior validations under high confining pressure.
Abstract
Concrete is a fundamental material in structural engineering, widely used in critical infrastructure such as bridges, nuclear power plants, and dams. These structures may be subjected to extreme dynamic loads resulting from natural disasters, industrial accidents, or missile impacts. Therefore, a comprehensive understanding of concrete behavior under high strain rates is essential for safe and resilient design. Experimental investigations, particularly spalling tests, have highlighted the strain-rate sensitivity of concrete in dynamic tensile loading conditions. This study presents a macroscopic 3D discrete element model specifically developed to simulate the dynamic response of concrete subjected to extreme loading. Unlike conventional continuum-based models, the proposed discrete element framework is particularly suited to capturing damage and fracture mechanisms in cohesive…
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Taxonomy
TopicsHigh-Velocity Impact and Material Behavior · Structural Response to Dynamic Loads · Rock Mechanics and Modeling