Repository logo
 

Damage modeling in Small Punch Test specimens

Accepted version
Peer-reviewed

Type

Article

Change log

Authors

Martínez-Pañeda, Emilio  ORCID logo  https://orcid.org/0000-0002-1562-097X
Cuesta, II 
Peñuelas, I 
Díaz, A 
Alegre, JM 

Abstract

Ductile damage modeling within the Small Punch Test (SPT) is extensively investigated. The capabilities of the SPT to reliably estimate fracture and damage properties are thoroughly discussed and emphasis is placed on the use of notched specimens. First, different notch profiles are analyzed and constraint conditions quantified. The role of the notch shape is comprehensively examined from both triaxiality and notch fabrication perspectives. Afterwards, a methodology is presented to extract the micromechanical-based ductile damage parameters from the load-displacement curve of notched SPT samples. Furthermore, Gurson-Tvergaard-Needleman model predictions from a top-down approach are employed to gain insight into the mechanisms governing crack initiation and subsequent propagation in small punch experiments. An accurate assessment of micromechanical toughness parameters from the SPT is of tremendous relevance when little material is available.

Description

Keywords

Small Punch Test, Fracture toughness, Ductile damage, Finite element method

Journal Title

Theoretical and Applied Fracture Mechanics

Conference Name

Journal ISSN

0167-8442
1872-7638

Volume Title

86

Publisher

Elsevier
Sponsorship
The authors gratefully acknowledge financial support from the Ministry of Economy and Competitiveness of Spain through grant MAT2014-58738-C3.