WAVE PROPAGATION AND REGULATION IN PERIODIC STRUCTURE BASED ON 4D-PRINTING
In this paper, we analyze the propagation of elastic waves in thermo-responsive shape memory polymer periodic cellular structures.At first, the shape memory polymer (SMP) periodic structures based on tBA-co-PEGDA networks were photopolymer printing by stereolithography apparatus (SLA).Due to the thermo-induced shape memory behavior, elastic instabilities of the internal microstructure for SMP can be triggered, thus causing a reversible change from square voids to circular voids.The temporary pattern transformations of the structures lead to a significant change in the phononic band structure, specifically in opening of a new narrow band gap.Besides, we also examined the evolution of their spectral band-gaps with varying volume fractions of the voids.The work provides good insights into structural organization and opportunities for developing tunable phononic devices.
4D printing Shape-memory polymers Phononic crystal Elastic instability
Ting-ting LIN Jian-ying HU Zhi-wei ZHU Yuan JIN Jian-ke DU
School of Mechanical Engineering and Mechanics, Ningbo University, Ningbo, Zhejiang 315211, CHINA
国际会议
哈尔滨
英文
181-186
2019-01-11（万方平台首次上网日期，不代表论文的发表时间）