A new technique to measure the dynamic fracture toughness of solids

Junyi Zhou; Antonio Pellegrino; Vito L. Tagarielli

doi:10.1016/j.polymertesting.2023.108198

A new technique to measure the dynamic fracture toughness of solids

Junyi Zhou, Antonio Pellegrino, Vito L. Tagarielli

Research output: Contribution to journal › Article › peer-review

1 Citation (SciVal)

Abstract

We propose and assess a new experimental technique to measure the fracture toughness of engineering materials and its sensitivity to strain rate. The proposed method is based on a ring expansion technique and it overcomes the limitations of current dynamic fracture tests, as it is not affected by transient stress wave propagation during loading and it results in spatially uniform remote stress and strain fields prior to fracture; the method is also suitable to achieve remote strain rates well in excess of 1000 s⁻¹. We demonstrate the technique by measuring the plane-stress Mode I fracture toughness of PMMA specimens at remote strain rates ranging from 10⁻³ s⁻¹ to 10² s⁻¹. The experiments show an increase of the toughness of the material with increasing strain rate.

Original language	English
Article number	108198
Journal	Polymer Testing
Volume	127
Early online date	11 Sept 2023
DOIs	https://doi.org/10.1016/j.polymertesting.2023.108198
Publication status	Published - 1 Oct 2023

Bibliographical note

Data availability: Data will be made available on request.

Funding

We acknowledge the assistance of Stuart Carter (Oxford) in the manufacturing and instrumentation of all specimens. The research is supported by Rolls-Royce plc and EPSRC under the Prosperity Partnership Grant\Cornerstone: Mechanical Engineering Science to Enable Aero Propulsion Futures, Grant 512 Ref: EP/R004951/1.

Funders	Funder number
Engineering and Physical Sciences Research Council	EP/R004951/1
Rolls Royce

Keywords

Dynamic fracture
PMMA
Strain rate sensitivity
Toughness

ASJC Scopus subject areas

Polymers and Plastics
Organic Chemistry

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10.1016/j.polymertesting.2023.108198Licence: CC BY

Cite this

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abstract = "We propose and assess a new experimental technique to measure the fracture toughness of engineering materials and its sensitivity to strain rate. The proposed method is based on a ring expansion technique and it overcomes the limitations of current dynamic fracture tests, as it is not affected by transient stress wave propagation during loading and it results in spatially uniform remote stress and strain fields prior to fracture; the method is also suitable to achieve remote strain rates well in excess of 1000 s−1. We demonstrate the technique by measuring the plane-stress Mode I fracture toughness of PMMA specimens at remote strain rates ranging from 10−3 s−1 to 102 s−1. The experiments show an increase of the toughness of the material with increasing strain rate.",

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A new technique to measure the dynamic fracture toughness of solids

Abstract

Bibliographical note

Funding

Keywords

ASJC Scopus subject areas

Access to Document

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