Impact response of ductile self-reinforced composite corrugated sandwich beams

Abstract

Impact response of ductile self-reinforced composite corrugated sandwich beams. SrPET are manufactured and tested dynamically. The beams are subjected to impact loading at the mid-span using a metal foam projectile and the beam deflection is measured. For sandwich beams with a constant areal mass, beams with a high mass portion in the core webs outperform configurations with a high mass portion in the face sheets (given that the face sheets are thick enough to carry the transversal loads induced by the core webs). Reinforcing the face sheet -core web interface further improves the impact response. The strain rate sensitivity of SrPET has also been investigated. A three-dimensional finite element (FE) model has been developed to simulate the impact event and a good agreement is found with the measured response. It is found that corrugated sandwich beams made from SrPET has competitive impact performance compared to similar sandwich beams with equal mass and geometry out of aerospace grade aluminium and carbon fiber / high performance foam sandwich. Composites

Influence of temperature during overmolding on the tensile modulus of self‐reinforced poly(ethylene terephthalate) insert

“…Extensive research has been carried out on different SrPC materials over the last 40 years 2,3 including investigations on process optimization, [4][5][6] static and dynamic material properties. [7][8][9] However, there are currently few products manufactured from these materials even though there are many proposals as to where these materials can be applied for weight reduction and improved material recyclability. [10][11][12][13] One reason why there are few products made from SrPC materials is because the important applied research that is necessary in order to bring new materials into production is missing for most SrPC materials.…”

“…Self‐reinforced polymer composites (SrPC) are thermoplastic materials with a low density, high mechanical properties, and ductility in combination with good recyclability and are thereby attractive for use in many products. Extensive research has been carried out on different SrPC materials over the last 40 years including investigations on process optimization, static and dynamic material properties . However, there are currently few products manufactured from these materials even though there are many proposals as to where these materials can be applied for weight reduction and improved material recyclability .…”

The low-velocity impact and compression after impact (CAI) behavior of foam core sandwich panels with shape memory alloy hybrid face-sheets

“…Due to the high physical and mechanical properties in term of high specific strength and stiffness, sandwich panels are being widely applied in various branches of engineering fields, including leading applications such as the aircraft, civil engineering and railway industries [1][2][3][4][5][6]. The sandwich panels with carbon fiber reinforced plastic (CFRP) face-sheets exhibited better mechanical performance lower weight compared to those with metal facesheets [7][8][9].…”

Corrugated structures reinforced by shape memory alloy sheets: Analytical modeling and finite element modeling

“…Also, there are some studies on smart beam, [30][31][32][33][34] smart composite beams, 9,24 and corrugated beams. 27,35 In this article, a corrugated beam with SMA sheets on both top and bottom sides is studied and a semi-analytical solution based on kinematic Euler-Bernoulli beam formulation is proposed. To simulate the deformation behavior of the smart structure, the modified Brinson's model has been employed and the SMA behavior is assumed to be asymmetric under tensional and compressive loading.…”