Profile cover photo
Profile photo
Emilio Martínez Pañeda
Research Engineer
Research Engineer
About
Posts

Post has attachment
I hope some of you may find this work interesting:

Damage modeling in Small Punch Test specimens

E. Martínez-Pañeda, I.I. Cuesta, I. Peñuelas, A. Díaz, J.M. Alegre

Theoretical and Applied Fracture Mechanics, 86A, pp. 51-60

http://www.sciencedirect.com/science/article/pii/S0167844216301616

A pre-print is available at www.empaneda.com

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.
Add a comment...

Post has attachment
For those of you that may be interested, our latest work has been recently published in Acta Materialia. Our gradient-enhanced predictions reveal very encouraging results for hydrogen assisted cracking in an ultra-high strength steel and a Nickel superalloy.

http://www.sciencedirect.com/science/article/pii/S1359645416305183

As usual a pre-print is available at www.empaneda.com
Add a comment...

Post has attachment
For those of you that may be interested, our latest work on gradient plasticity formulations is available online. The results reveal some interesting features of Gurtin (2004) theory under pure bending.

http://www.sciencedirect.com/science/article/pii/S0020768316301081

As usual, a pre-print version is available at www.empaneda.com
Add a comment...

Post has attachment
Add a comment...

Post has attachment
Add a comment...

Post has attachment
I hope some of you (especially those working on strain gradient plasticity or fracture and damage modeling) may find this work interesting

(A preprint version of the paper is available at www.empaneda.com)
Add a comment...

Post has attachment

Post has attachment
I hope some of you (especially those working on fracture and damage modeling) may find this work interesting
Add a comment...

Post has attachment
For those to whom it may concern, our last research work regarding the finite element analysis of fracture in functionally graded materials (FGMs) is now available online.

Para aquellos a los que pudiera interesar, nuestro último trabajo con respecto al análisis por elementos finitos de problemas de fractura en materiales funcionalmente graduados (FGMs) ya está disponible online.

http://link.springer.com/article/10.1007/s10999-014-9265-y
Add a comment...

Post has attachment
Photo
Photo
Scrapbook photos
6 Photos - View album
Add a comment...
Wait while more posts are being loaded