The edge-notched clamped beam bend specimen as a fracture toughness test geometry

被引：14

作者：

Mishra, Ashwini Kumar ^{[1
]}

Lambai, Aloshious ^{[1
]}

Jayaram, Vikram ^{[2
]}

Jaya, Balila Nagamani ^{[1
]}

机构：

[1] Indian Inst Technol, Dept Met Engn & Mat Sci, Mumbai 400076, Maharashtra, India

[2] Indian Inst Sci Bangalore, Dept Mat Engn, Bengaluru 560012, India

来源：

THEORETICAL AND APPLIED FRACTURE MECHANICS | 2020年 / 105卷

关键词：

Clamped beam; Stress intensity factor; Fracture toughness; PMMA; WC-Co; CRACK STABILITY; IN-SITU; MODE; PMMA;

D O I：

10.1016/j.tafmec.2019.102409

中图分类号：

TH [机械、仪表工业];

学科分类号：

0802 ;

摘要：

Edge-notched clamped beam bend fracture specimens provide the required geometric stability for controlled crack growth in brittle materials, enabling the measurement of R-curves and cyclic crack growth. In this paper, finite element simulations were carried out on this test geometry to extract the normalized stress intensity factor K-I solutions for different useful specimen dimensions, loading tip radius and loads. Based on these results, geometric factors have been proposed that can fit various beam aspect and crack depth ratios. Crack stability analysis is carried out in terms of the R locus for various beam aspect ratios for the clamped beam geometry and compared to other fracture toughness tests. Experimental verification of the same has been carried out at the macro-scale using poly-methyl methacrylate (PMMA) and WC-Co as model materials.

引用

页数：8

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