Mechanical responses of “roaddevice” of piezoelectric electricity generation pavement based on numerical simulation(PDF)
长安大学学报（自然科学版）[ISSN:1006-6977/CN:61-1281/TN]
- Issue:
- 2019年06期
- Page:
- 12-19
- Research Field:
- 道路工程
- Publishing date:
Info
- Title:
- Mechanical responses of “roaddevice” of piezoelectric electricity generation pavement based on numerical simulation
- Author(s):
- HOU Yueqin; HE Chuang; JI Xiaoping
- (1. School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, Shaanxi, China； 2. Guangzhou Expressway Co., Ltd., Operation Branch, Guangzhou 511385, Guangdong, China; 3. School of Highway, Changan University, Xi’an 710064, Shaanxi, China)
- Keywords:
- road engineering; asphalt pavement; piezoelectric effect; electricity generation pavement; mechanical response; numerical simulation
- PACS:
- -
- DOI:
- -
- Abstract:
- In order to reveal the stress concentration phenomenon of the piezoelectric electricity generation pavement and determine the mechanical strength requirement of the piezoelectric generator that meets the road requirement etc, the ABAQUS software was firstly used to establish the “roaddevice” coupling model of pavement and piezoelectric generator, and further to construct the numerical simulation technology of the mechanical response of pavement and piezoelectric device. And then, the mechanical response of piezoelectric electricity generation pavement under 100 kN load was simulated, including tensile stress, compressive stress, shear stress, tensile strain, compressive strain and displacement etc. And the influences of the piezoelectric device shapes (cuboid, cylinder and cylindrical) and materials (PZT4, PZT5H) on the stress concentration were investigated. The mechanical response of piezoelectric devices with different shapes and materials embedded in different depths and plane positions were simulated, including the tensile stress, compressive stress, shear stress, tensile strain and compressive strain under different loads. And also, the variation of mechanical response of piezoelectric device was discussed. Finally, the safety factor and mechanical strength requirements of piezoelectric device were proposed, based on the mechanical response of piezoelectric device and the influence of temperature, overload and road roller. The results show that the various mechanical responses of the piezoelectric electricity generation pavement are greater than that of the pavement without piezoelectric device, indicating the piezoelectric device causes stress concentration on pavement, and the tensile stress concentration factor is as high as 7.5 or more, as well as the stress concentration is located around the piezoelectric device. The shape of piezoelectric transducer has a significant effect on stress concentration, and the stress concentration is the weakest when caused by the cuboid piezoelectric transducer, followed by the cylinder and cylindrical piezoelectric transducers. Moreover, the stress concentration caused by different piezoelectric materials is basically the same. The shape of piezoelectric transducer has a significant influence on the mechanical response of the piezoelectric device. The cylinder transducer reaches the highest mechanical response, successively followed by the cuboid transducer, and the cylindrical transducer is the lowest. Based on the mechanical response of the piezoelectric device and the influences of temperature, overloading and roller, the safety factor and strength requirements of the piezoelectric device are proposed. 11 tabs, 2 figs, 28 refs.
Last Update: 2019-12-19