Poisson's ratio measurement through engraving the grid pattern inside poly(dimethylsiloxane) by ultrafast laser. (22nd September 2021)

• Record Type: Journal Article
• Authors: Cho, Han Saem; Kim, Hyun A; Seo, Dong Woo; Jeoung, Sae Chae
• Is Part Of: Japanese journal of applied physics. Volume 60:Number 10(2021)
• Publication Date: 2021-09-22
• Subjects: Poisson's ratio of soft materials -- Ultrafast laser patterning -- Instrumentation for polymer mechanical properties; Physics -- Periodicals; 621.05
• DOI: 10.35848/1347-4065/ac2424
• Languages: English
• ISSNs: 0021-4922

Abstract

Abstract: This work demonstrates an application of ultrafast laser processing to engrave a grid pattern for evaluating mechanical properties. No observable changes in the material properties caused by laser engraving were confirmed if the grid pattern is engraved with laser energy of 0.21 μ J/pulse and pulse repetition rate of 1 kHz. The shape changes of grid pattern directly reveal whether the deformation accompanied with stretching is uniaxial or not. By analyzing the optical images of the grid pattern, Poisson ratio, Young's modulus, and shear modulus of poly(dimethylsiloxane) (PDMS) with a weight percent of curing agent of 9% were estimated to be 0.49989 ± 0.00111, 1.45 ± 0.01 MPa, and 0.725 MPa, respectively. The comparison of the current results with the literature values suggests that the proposed method is appropriate to provide quantitative mechanical properties of soft materials with high accuracy.