Affiliation:
1. Department of Mechanical Engineering, South Tehran Branch Islamic Azad University Tehran Iran
2. Center of Research for Composite and Smart Materials and Structures, Faculty of Mechanical Engineering K. N. Toosi University of Technology Tehran Iran
3. Applied Mechanics Department Indian Institute of Technology‐Delhi New Delhi India
4. Faculty of Materials Science and Engineering K. N. Toosi University of Technology Tehran Iran
Abstract
AbstractThis paper presents an experimental examination of the compression demeanor of lightweight corrugated core composite (CCC) sandwich panel and corrugated core smart composites (CCSC) sandwich panels subjected to quasi‐static edgewise compression loading. The existence of shape memory alloy (SMA) wires and pre‐strain percentages of SMA are the indicators studied in this article. The fabrication procedure presented and the appraisement of the mechanical properties of the CCC and CCSC sandwich panels are expressed. The core geometry of samples is trapezoid corrugated made of aluminum. The facesheets are four layers of woven glass fiber/ epoxy laminated composite. For evaluation of the efficacy of the presence of SMA wires on mechanical specifications of sandwich panels, three SMA wires with various pre‐strain percentages (0%, 3%, and 6%) are embedded in each composite facesheet. Mechanical properties of all types of CCC and CCSC sandwich panels such as maximum force, critical damage force, specific strength, absorb energy, specific toughness, Young's modulus, and specific stiffness were evaluated. Results showed that the CCC sandwich panel has higher mechanical specifications than the CCSC sandwich panels with 0% and 3% pre‐strain. Also, increasing pre‐strained SMA wires improves all mechanical parameters of CCSC sandwich panels. CCSC sandwich panel with 6% pre‐strain has the highest compression properties than other sandwich panels. Maximum Force, Critical Damage Force, Specific Strength, Absorbed Energy, Specific Toughness, Young's Modulus, and Specific Stiffness of CCSC sandwich panel with 6% pre‐strain are 14.73 kN, 13.6 kN, 9.55 MPa/g, 26.61 kJ, 0.346 MJ/m3g, 4395 MPa and 0.61 kN/mm g, respectively.Highlights
Lightweight CCC sandwich panel and CCSC sandwich panel manufactured.
Compression behavior of CCC sandwich panel and CCSC sandwich panel evaluated.
Pre‐strained SMA wires improves energy absorption of CCSC sandwich panels.
Higher specific toughness was obtained with 6% pre‐strain SMA.
Presence of SMA wires with no pre‐strain cannot improve the specific strength.