Impact Resistance of Ultra-High-Performance Concrete Composite Structures

Area of Science:

• Materials Science
• Civil Engineering
• Mechanical Engineering

Background:

• Ultra-high-performance concrete (UHPC) offers superior strength, toughness, and durability compared to traditional concrete.
• UHPC is ideal for impact-resistant structures, yet research on its composite structures' impact performance is limited.
• Understanding UHPC's impact resistance is crucial for protective engineering designs.

Purpose of the Study:

• To investigate the impact resistance performance of UHPC composite structures.
• To compare the impact behavior of UHPC with granite targets.
• To develop and validate a numerical model for simulating projectile impact on UHPC.

Main Methods:

• Experimental impact tests using high-speed projectiles on UHPC and granite targets.
• Numerical simulation of projectile impact on UHPC composite structures using ANSYS 16.0/LS-DYNA.
• Parametric analysis of impact velocity, angle, and reinforcement ratio on penetration depth.

Main Results:

• UHPC targets exhibited smaller surface craters but greater penetration depth than granite targets under projectile impact.
• Numerical simulation results closely matched experimental data for penetration depth and crater diameter.
• Projectile deflection increases with larger impact angles and lower velocities.
• Penetration depth decreases significantly with increasing reinforcement ratio in a linear relationship.

Conclusions:

• The validated numerical model provides a reliable tool for analyzing UHPC composite structure impact.
• Impact velocity, angle, and reinforcement ratio significantly influence projectile penetration.
• Findings enhance the safety and reliability of protective structures and promote UHPC applications in engineering.