Determination of in-situ mixed mode fracture parameters

1993 ◽  
Vol 70 (3) ◽  
pp. R63-R68
Author(s):  
X. L. Zhao
Keyword(s):  
Mixed Mode ◽  
Mixed Mode Fracture ◽  
Mode Fracture ◽  
Fracture Parameters

scholarly journals In-situ Mechanical Characterization of Mixed-Mode Fracture Strength of Cu/Si Interface for TSV Structures

2018 ◽  
Author(s):  
Chenglin Wu ◽  
Congjie Wei ◽  
Yanxiao Li
Keyword(s):  
Mixed Mode ◽  
Ion Beam ◽  
Interfacial Fracture ◽  
Nonlinear Material ◽  
Small Scale ◽  
Mixed Mode Fracture ◽  
Mode Fracture ◽  
Microelectronic Devices ◽  
Nanoindentation Experiment

In-situ nanoindentation experiment has been widely adopted to characterize material behaviors of microelectronic devices. This work introduces the latest developments of nanoindentation experiment in characterizing nonlinear material properties of 3D integrated microelectronic devices with through-silicon-vias (TSVs). The elastic, plastic, and interfacial fracture behavior of the copper via and matrix-via interface have been characterized using small scale specimens prepared with focused-ion-beam (FIB) and nanoindentation experiment. A brittle interfacial fracture was found at the Cu/Si interface under mixed-mode loading with a phase angle ranging from 16.7 to 83.7 degrees. The mixed-mode fracture strengths were extracted using the linear elastic fracture mechanics (LEFM) analysis and a fracture criterion was obtained by fitting the extracted data with the power-law function. The vectorial interfacial strength and toughness were found to be independent with mode-mix.

In‑situ optical approach to predict mixed mode fracture in a polymeric biomaterial

2021 ◽  
pp. 103211
Author(s):  
Saeid Ghouli ◽  
Majid R. Ayatollahi ◽  
Bahador Bahrami ◽  
Jamaloddin Jamali
Keyword(s):  
Mixed Mode ◽  
Mixed Mode Fracture ◽  
Mode Fracture ◽  
Polymeric Biomaterial

scholarly journals Measurement of mixed-mode fracture parameters near cracks in homogeneous and bimaterial beams

1993 ◽  
Vol 61 (3) ◽  
pp. 247-265 ◽  
Author(s):  
Hareesh V. Tippur ◽  
Sreeganesh Ramaswamy
Keyword(s):  
Mixed Mode ◽  
Mixed Mode Fracture ◽  
Mode Fracture ◽  
Fracture Parameters

scholarly journals Analysis of Mixed-Mode I/II/III Fracture Toughness Based on a Three-Point Bending Sandstone Specimen with an Inclined Crack

2021 ◽  
Vol 11 (4) ◽  
pp. 1652
Author(s):  
Xin Pan ◽  
Jiuzhou Huang ◽  
Zhiqiang Gan ◽  
Shiming Dong ◽  
Wen Hua
Keyword(s):  
Fracture Toughness ◽  
Mixed Mode ◽  
Mode I ◽  
Mixed Mode Fracture ◽  
Pure Mode ◽  
Inclined Crack ◽  
Tangential Strain ◽  
Mode Fracture ◽  
Fracture Parameters ◽  
T Stress

The crack-propagation form may appear as an arbitrary mixed-mode fracture in an engineering structure due to an irregular internal crack. It is of great significance to research the mixed-mode fracture of materials with cracks. The coupling effect of multiple variables (crack height ratio, horizontal deflection angle and vertical deflection angle) on fracture parameters such as the stress intensity factors and the T-stress are the key points in this paper. A three-point bending specimen with an inclined crack was proposed and used to conduct mixed-mode fracture research. The fracture parameters were obtained by finite element analysis, and the computed results showed that the pure mode I fracture and mixed-mode fractures (mode I/II, mode I/III and mode I/II/III) can be realized by changing the deflection angles of the crack. The pure mode I and the mixed-mode fracture toughness of sandstone were obtained by a series of mixed-mode fracture experiments. The experimental results were analyzed with the generalized maximum tangential strain energy density factor criterion considering T-stress. The results showed that the non-singular term T-stress in the fracture parameters cannot be ignored in any mixed-mode fracture research, and the generalized maximum tangential strain energy density factor criterion considering T-stress can better predict the mixed-mode fracture toughness than other criteria.

scholarly journals Mixed-mode fracture parameters estimation by genetic programming

2018 ◽  
Vol 0 (0) ◽  
pp. 0-0
Author(s):  
Abdolghafour Khademalrasoul ◽  
Arash Adib
Keyword(s):  
Genetic Programming ◽  
Mixed Mode ◽  
Parameters Estimation ◽  
Mixed Mode Fracture ◽  
Mode Fracture ◽  
Fracture Parameters
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