The Effect of Interlayer Materials on Ceramic Damage in SiC/Al Composite Structure

Current research on composite structures often focuses on the mechanical behavior of layered systems under dynamic loads. Prior work has shown that ceramic layers in composites are vulnerable to impact-induced damage. However, the role of interlayer materials in mitigating this damage remains unclear. No prior work had resolved how different interlayer materials affect ceramic damage evolution. That uncertainty drove this investigation into how interlayer choices influence ceramic damage. This gap motivated the use of simulation and impact testing to evaluate interlayer effects. Prior research has shown ceramics are brittle and prone to cracking under tension. It was already known that interlayers can influence stress distribution in composites. This paper's contribution is a direct comparison of TPU, AFRP, and CFRP interlayers on ceramic damage. No previous study had combined impact testing with simulation for this specific purpose.

The aim of this study was to evaluate how different interlayer materials affect ceramic damage in SiC/Al composite structures. The specific problem addressed is the lack of understanding about how interlayer choices influence damage evolution under impact. The motivation stems from the need to improve composite durability in high-impact environments. The researchers propose that interlayer material properties can significantly alter stress distribution. This study tests the hypothesis that certain interlayers reduce ceramic damage. The focus is on comparing TPU, AFRP, and CFRP interlayers. The goal is to determine which material best mitigates ceramic damage. The results could inform the design of more impact-resistant composite structures.

The study combined experimental impact testing with simulation-based stress analysis. Three interlayer materials—TPU, AFRP, and CFRP—were tested in SiC/Al composites. Each interlayer was 0.5 mm thick, except TPU at 0.25 mm. Impact tests measured ceramic damage under controlled conditions. Simulation models tracked tensile stress evolution on the ceramic rear surface. The simulation approach allowed researchers to correlate stress patterns with damage outcomes. Data from both methods were compared to assess interlayer effectiveness. The experimental setup ensured consistent impact energy across all trials. This approach enabled a direct comparison of interlayer performance in mitigating damage.

The TPU interlayer showed the highest ceramic damage under impact. The damaged area was significantly larger than with other interlayers. AFRP reduced the ceramic damage area by 73% compared to TPU. CFRP also reduced ceramic damage, though the exact percentage was not specified. Simulation results revealed the tensile stress evolution on the ceramic rear surface. The simulation accurately predicted the experimental damage patterns. Tensile stress peaks were lower in composites with AFRP or CFRP interlayers. This correlation between simulation and experiment validates the model's predictive power. The findings suggest that interlayer material choice strongly influences damage mitigation.

The authors propose that interlayer material selection significantly affects ceramic damage in SiC/Al composites. AFRP and CFRP interlayers reduce damage more effectively than TPU. The simulation model successfully explains the experimental damage patterns. This correlation supports the use of simulation for predicting ceramic damage. The findings suggest that interlayers can be optimized to improve composite durability. The study highlights the importance of stress distribution in mitigating ceramic damage. The results may inform the design of impact-resistant composite structures. The authors suggest that future work could explore other interlayer materials for further damage reduction.