Study on the Suitability of Concrete Constitutive Models for Perforation Simulation

Area of Science:

• Computational mechanics
• Materials science
• Civil engineering

Background:

• Accurate simulation of concrete target perforation is crucial for structural design and safety.
• Existing constitutive models for concrete exhibit varying performance in predicting complex failure mechanisms.
• Understanding the strengths and weaknesses of different models is essential for reliable numerical analysis.

Purpose of the Study:

• To evaluate and compare the effectiveness of four distinct concrete constitutive models (HJC, RHT, KCC, TCK) in simulating reinforced concrete target perforation.
• To analyze the influence of strength models, damage evolution, and strain rate effects on simulation accuracy.
• To provide guidance on selecting appropriate constitutive models and parameters for concrete perforation simulations.

Main Methods:

• Numerical simulation using LS-DYNA 11.0.
• Analysis of four constitutive models: Holmquist-Johnson-Cook (HJC), Randy H. R. (RHT), Kasahara-Chiba-Chiba (KCC), and The Concrete Model (TCK).
• Evaluation based on concrete damage patterns, erosion crack formation, and projectile residual velocity.

Main Results:

• The RHT and TCK models effectively captured concrete damage and failure modes.
• The KCC and HJC models showed superior accuracy in predicting projectile residual velocity.
• Erosion parameters were found to significantly influence simulation outcomes.

Conclusions:

• The RHT and TCK models are recommended for simulating concrete damage and failure modes.
• The KCC and HJC models are suitable for predicting the residual velocity of projectiles.
• Careful selection and calibration of erosion parameters are critical for accurate concrete perforation simulations.