期刊
JOURNAL OF STRAIN ANALYSIS FOR ENGINEERING DESIGN
卷 56, 期 3, 页码 173-180出版社
SAGE PUBLICATIONS LTD
DOI: 10.1177/0309324720944067
关键词
Small punch test; biaxial fracture strain; acoustic emission; fracture toughness
资金
- project grant FADAMES - Marie Curie Individual Fellowship Program from Horizon 2020, European Commission [792652]
- Marie Curie Actions (MSCA) [792652] Funding Source: Marie Curie Actions (MSCA)
This article explores the use of acoustic emission technique in small punch tests to estimate unstable fracture initiation and corresponding punch displacement. Results confirm the potential of acoustic emission technique in detecting unstable cracking onset and accurately estimating equivalent biaxial fracture strain.
The small punch test initially used mainly in the nuclear sector proved to be an efficient method of estimating the mechanical properties of materials, including fracture toughness. In general, the fracture toughness is estimated based on a correlation with equivalent biaxial fracture strain. However, the latter depends on knowing the onset of the unstable fracture. In this article, the acoustic emission technique is used within the small punch test for estimating the unstable fracture initiation and determining the corresponding punch displacement from the load-displacement curve. Although, the acoustic emission signal can be slightly altered due to the location of the sensor, the results confirm the potential of the acoustic emission technique for detecting the onset of the unstable cracking and thus accurately estimating the equivalent biaxial fracture strain. The accumulated energy during the small punch test is one of the relevant acoustic emission parameters in estimating the fracture onset since it can be associated with the accumulated strain energy released by the deformed material.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据