Residual strength and failure evolution of adhesively bonded joints under successive ballistic impacts
Engineering Failure Analysis, cilt.182, 2025 (SCI-Expanded, Scopus)
- Yayın Türü: Makale / Tam Makale
- Cilt numarası: 182
- Basım Tarihi: 2025
- Doi Numarası: 10.1016/j.engfailanal.2025.110021
- Dergi Adı: Engineering Failure Analysis
- Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Academic Search Premier, Aerospace Database, Communication Abstracts, Compendex, INSPEC, Metadex, DIALNET, Civil Engineering Abstracts
- Anahtar Kelimeler: Adhesive joint, Ballistic, Failure mechanisms, Multiple impacts, Numerical analysis, Overlap length
- Ankara Yıldırım Beyazıt Üniversitesi Adresli: Evet
Özet
Single-lap joints (SLJs) are widely utilized in structural applications due to their straightforward design, low cost, and ease of fabrication. Although extensive research has been conducted on their static and fatigue behavior, their response to repeated impact loading remains less understood. In practical scenarios, SLJs may encounter recurring impacts – such as accidental tool drops or airborne debris – which can lead to gradual damage accumulation and a reduction in structural performance over time. This study investigates the multi-impact response of adhesively bonded SLJs using both experimental testing and finite element simulations. Joints with 4.0 mm adherend thickness and a 15.0 mm overlap were subjected to one, two, and three successive impacts by 1.25 g lead projectiles traveling at approximately 288.0 m/s. Post-impact mechanical performance was evaluated through quasi-static tensile testing and compared against pristine samples. Finite element models developed in ABAQUS included the Johnson–Cook plasticity model for the adherends and projectile, and cohesive zone modeling for the adhesive. The primary objectives are to characterize damage mechanisms resulting from successive impacts, evaluate the degradation in mechanical performance under varying impact energy magnitudes and sequences, and assess the influence of overlap length on residual strength.