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oai:riubu.ubu.es:10259/56632021-11-02T12:04:42Zcom_10259_4201com_10259_5086com_10259_2604col_10259_4505

00925njm 22002777a 4500 dc Martínez Pañeda, Emilio author Cuesta Segura, Isidoro Iván author Peñuelas, I. author Díaz Portugal, Andrés author Alegre Calderón, Jesús Manuel author 2016-12 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. 0167-8442 http://hdl.handle.net/10259/5663 10.1016/j.tafmec.2016.09.002 Small Punch Test Fracture toughness Ductile damage Finite element method Damage modeling in Small Punch Test specimens