Experimental Study on Composite Sandwich Beams with Longitudinal GFRP Webs

2018 5th International Conference on Advanced Composite Materials and Manufacturing Engineering

Zhang, Fubin^1 ; Liu, Weiqing^2 ; Zhang, Fuyun^1

Faculty of Civil Engineering and Mechanics, Jiangsu University, Zhenjiang

212013, China^1

College of Civil Engineering, Nanjing Tech University, Nanjing

210009, China^2

关键词: Bending performance;    Bending stiffness;    Buckling failure;    Composite sandwich beam;    Compressive failure;    Initial bending;    Sandwich beams;    Ultimate bending strengths;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/394/3/032104/pdf
DOI  :  10.1088/1757-899X/394/3/032104

来源: IOP

【 摘 要 】

This study focused on the bending performance of sandwich beams composed of GFRP skins, PU foam core, and longitudinal GFRP webs. The longitudinal webs were distributed along the length direction of the beam. Six beams were tested to validate the effectiveness of longitudinal webs for increasing the ultimate bending strength. Compared to the control specimen, a maximum of an approximately 316% and 59% increase in the ultimate bending strength and bending stiffness can be achieved, respectively. The influences of longitudinal web thickness, fiber paly angle and web spacing on failure mode and bending stiffness were also investigated. Test results demonstrated that the ultimate bending strength and initial bending stiffness can be enhanced by increaseing the web thickness and reduce web space. Meanwhile, various failure modes were summarized, including core shear failure, skin compressive failures, and webs buckling failure, due to the presence of the longitudinal webs.