Experimental investigation of impact-induced damage mechanisms of PPS-based laminates and their effect on the residual mechanical properties. | ||
| Journal of Engineering Science and Military Technologies | ||
| Articles in Press, Accepted Manuscript, Available Online from 05 October 2025 | ||
| Document Type: Original Article | ||
| DOI: 10.21608/ejmtc.2025.407433.1328 | ||
| Authors | ||
| Mohamed Ahmed Abdelwahed Ali* 1; Yasser Shaban2; Samy Lawaty3 | ||
| 1Military Technical College | ||
| 2Mechanical Design Department, Helwan University- Faculty of Engineering, Cairo | ||
| 3Mechanical Design Department, Helwan University- Faculty of Engineering | ||
| Abstract | ||
| Abstract The low velocity impact is considered as one of the most serious threats to composite materials as it is usually invisible and it occurs regularly in service. This paper aimed to identify the different mechanisms of the damage scenarios for CF/PPS composite thick laminated plates subjected to low velocity impacts. Also, the damage effects on the material’s physical and mechanical properties were investigated. Thermoplastic composite laminates were impacted at three different energies, using instrumented drop weight impact method. Two different quasi-isotropic stacking sequences ([0, ±60]and [0, ±45, 90]) were used in this work, to represent the effect of stacking sequences on the damage response. C-scan and optical microscopy inspections showed that the resulted damage consists of different failure mechanisms: fiber breakages, intralaminar cracking, fiber-matrix intraply damage and sound delamination in CF/PPS laminates. In PPS-based composites, the matrix plasticization particular affect the matrix-rich regions by locally developing permanent deformations. CAI and four-point bending tests are performed to investigate the mechanical response of the impacted laminates. Residual strength was found to decrease by increasing of the impact energy. | ||
| Keywords | ||
| Impact; Thermoplastics; Composites; Damage | ||
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