Strain analysis of Moso bamboo (Phyllostachys pubescens) subjected to longitudinal tensile force. (September 2021)

• Record Type: Journal Article
• Authors: Yang, Teng-Chun; Yang, Hsing-Yu
• Is Part Of: Materials today communications. Volume 28(2021)
• Publication Date: 2021-09
• Subjects: Moso bamboo -- Digital image correlation (DIC) -- Poisson's ratio -- Strain gauge -- Tensile force; Materials science -- Periodicals; 620.11
• DOI: 10.1016/j.mtcomm.2021.102491
• Languages: English
• ISSNs: 2352-4928

Abstract

Abstract: This study used digital image correlation (DIC) to perform a strain analysis of Moso bamboo ( Phyllostachys pubescens ) in the tangential section subjected to longitudinal tensile force to compare samples from outer/inner position of the culm wall. Simultaneously, an electrical resistance strain gauge (SG) was used to measure the strain profile for comparison with the strain analysis using DIC. During loading, the rate of the longitudinal strain between different positions was significantly different. As the load time increased, there was no difference in the rate of the transverse strain between the outer and inner samples, while the rate of the longitudinal strain for the inner sample was higher than that for the outer sample. Additionally, DIC showed that the longitudinal direction showed a relatively homogeneous strain contour compared to the transverse direction. Furthermore, the result indicated that the Poisson's ratio was dependent on the positions of the bamboo in the radial direction of the culm wall. Using SG recording as a reference, the DIC revealed appropriate strain behavior of bamboo in terms of longitudinal and transverse strains within full-field area. Therefore, the DIC recording may help to characterize strain deformation on the bamboo during the application of a tensile force.