The energy absorption behavior of novel composite sandwich structures reinforced with trapezoidal latticed webs

Reviews on Advanced Materials Science

Zhu Lu¹  Wang Jian¹  Wu Peng¹  Fang Hai¹  Han Juan¹ 

[1] College of Civil Engineering, Nanjing Tech University, Nanjing 211816, China;

关键词: composite sandwich structure;    trapezoidal latticed webs;    energy absorption;    fe modeling;   

DOI  :  10.1515/rams-2021-0041

来源: DOAJ

【 摘 要 】

This article proposed an innovative composite sandwich structure reinforced with trapezoidal latticed webs with angles of 45°, 60° and 75°. Four specimens were conducted according to quasi-static compression methods to investigate the compressive behavior of the novel composite structures. The experimental results indicated that the specimen with 45° trapezoidal latticed webs showed the most excellent energy absorption ability, which was about 2.5 times of the structures with vertical latticed webs. Compared to the traditional composite sandwich structure, the elastic displacement and ultimate load-bearing capacity of the specimen with 45° trapezoidal latticed webs were increased by 624.1 and 439.8%, respectively. Numerical analysis of the composite sandwich structures was carried out by using a nonlinear explicit finite element (FE) software ANSYS/LS-DYNA. The influence of the thickness of face sheets, lattice webs and foam density on the elastic ultimate load-bearing capacity, the elastic displacement and initial stiffness was analyzed. This innovative composite bumper device for bridge pier protection against ship collision was simulated to verify its performance. The results showed that the peak impact force of the composite anti-collision device with 45° trapezoidal latticed webs would be reduced by 17.3%, and the time duration will be prolonged by about 31.1%.

【 授权许可】

Unknown