Investigation on brittle-ductile transition of PMMA mode-II fracture using time-temperature superposition principle

被引：9

作者：

Yao, Chengbin ^{[1
]}

Xia, Yan ^{[1
]}

Zhu, Zhongmeng ^{[1
]}

Yang, Zhuoran ^{[1
]}

Chen, Kang ^{[1
]}

Jiang, Han ^{[1
]}

机构：

[1] Southwest Jiaotong Univ, Sch Mech & Aerospace Engn, Applied Mech & Structure Safety Key Lab Sichuan Pr, Chengdu 610031, Peoples R China

来源：

ENGINEERING FRACTURE MECHANICS | 2022年 / 273卷

基金：

中国国家自然科学基金;

关键词：

Mode-II fracture; Brittle-ductile transition; Time-temperature superposition principle; PMMA; TOUGHNESS; STRESS; POLYCARBONATE; SPECIMEN; POLYMER;

D O I：

10.1016/j.engfracmech.2022.108733

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

The rate-temperature dependent brittle-ductile transition (BDT) behavior of PMMA (polymethyl methacrylate) mode-II fracture was investigated through tensile-loading shear fracture (TLSF) tests. The dimensionless ratio KJC/KIIC was chosen as the index to identify the brittle/ductile state. Assuming the fracture property to be viscosity-dominated, the time-temperature superposition principle based on the Arrhenius equation was adopted. The master curves of KJC/KIIC in a wide range of loading rate and temperature were constructed with the experimental data obtained under limited test conditions. With the derived critical BDT band from the master curve, the BDT state of PMMA's fracture under complex loading conditions was successfully predicted and experimentally validated. The results are helpful to describe the BDT behavior and provide an equivalent approach to investigate the mode-II fracture which can substantially save the experimental cost and time.

引用

页数：9

共 34 条

[1] Loading rate effect on mixed mode I/II brittle fracture behavior of PMMA using inclined cracked SBB specimen [J].