Abstract
Abstract This paper presents the concept, design, fabrication, application and experimental validation of a new type of composite sandwich matting. The composite sandwich matting comprises a paulownia woods as core material and glass fiber reinforced plastic (GFRP) as face-skins and lattice-webs. The matting was fabricated by vacuum infusion moulding process (VIMP). The mechanical properties of the component materials were studied. Four-point bending tests were also performed to investigate the flexural properties of the paulownia wood core sandwich panels. The experimental results showed that the failure mode of the structures was upper facesheet compressive yielding. The structures have good integrity against transverse load, there was a large plateau region after the initial failure and can prevent the structures from catastrophic failure. The finite element (FE) analysis showed a good agreement with the experimental results in predicting the load-displacement curve. The developed composite sandwich matting has been successfully used in military engineering, emergency rescue and large infrastructure construction owing to its excellent mechanical properties.
Highlights
Sandwich structures have been widely used in civil engineering, construction, marine and aerospace owing to their advantages of high bending stiffness, low structural weightSiivola et al [13] noticed that the initial failure was facesheets tensile yielding at the edges of the foam core sandwich beams
This paper presents the concept, design, fabrication, application and experimental validation of a new type of composite sandwich matting
In order to obtain the mechanical behavior of glass fiber reinforced plastic (GFRP) facesheets, tensile tests were carried out according to ASTM D3039 (Figure 4(a)) [26]
Summary
Sandwich structures have been widely used in civil engineering, construction, marine and aerospace owing to their advantages of high bending stiffness, low structural weight. Yalkin et al [25] studied the mechanical behaviors of sandwich composites with stitched or perforated foam core. The test results showed that the proposed stitched or perforated foam core can significantly improve the mechanical performances of the structures. These methods are time-consuming and lab-intensive, and all require special equipment to assist in processing. An innovative sandwich matting composed of GFRP facesheets and paulownia wood core was designed and introduced, which can be used to construct or repair the road in a short time to conduct contingency operations. The manufacturing process, experimental investigations and finite element analysis were studied for its wide range of applications in civil engineering and military engineering
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