A Study of the Elastic Properties of the Polymer PLA by Static and Ultrasonic Methods

被引：5

作者：

Korobov, A., I ^{[1
]}

Kokshaiskii, A., I ^{[1
]}

Mikhalev, E. S. ^{[1
]}

Odina, N., I ^{[1
]}

Shirgina, N., V ^{[1
]}

机构：

[1] Moscow MV Lomonosov State Univ, Dept Phys, Moscow 119991, Russia

来源：

ACOUSTICAL PHYSICS | 2021年 / 67卷 / 04期

基金：

俄罗斯科学基金会;

关键词：

ultrasonic wave velocity; PLA polymer; third-order elasticity coefficient; nonlinear elastic parameter; ALUMINUM-ALLOY; MECHANICAL-PROPERTIES; NANOCOMPOSITE;

D O I：

10.1134/S1063771021040060

中图分类号：

O42 [声学];

学科分类号：

070206 ; 082403 ;

摘要：

The article presents the results of experimental studies of the elastic properties of the polymer polylactide (PLA), which is widely used in 3D printing technology. The dependences of the mechanical stress on the static deformation magnitude are measured, and the dependence of the hysteresis is found. The values of the Young's modulus in the linear sections of loading and unloading of the sample are estimated. It is established that the periodic loading and unloading of the sample lead to its strengthening in the region of elastic deformations. An equation that relates the change in the velocity of acoustic waves in a thin rod with the value of its static deformation is obtained, which is suitable for describing the PLA sample under study. A linear dependence of the relative change in the elastic wave velocity in the sample on the magnitude of its static deformation is found. Based on the measurement results, the third-order elastic coefficients are determined and the nonlinear acoustic parameter in the PLA polymer is calculated.

引用

页码：375 / 380

页数：6

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