scholarly journals Evaluation of mode II fracture toughness in glass cloth/epoxy laminates by rail-shear test method.

1988 ◽  
Vol 37 (417) ◽  
pp. 683-689
Author(s):  
Hiroyuki KAWADA ◽  
Toshio AOKI ◽  
Monta KONDOH ◽  
Ikuhiko HAYASHI
Keyword(s):  
Fracture Toughness ◽  
Shear Test ◽  
Test Method ◽  
Mode Ii ◽  
Glass Cloth ◽  
Mode Ii Fracture ◽  
Mode Ii Fracture Toughness

New data on mode II fracture toughness of rock from the punch-through shear test

2004 ◽  
Vol 41 (3) ◽  
pp. 351-352 ◽  
Author(s):  
T. Backers ◽  
G. Dresen ◽  
E. Rybacki ◽  
O. Stephansson
Keyword(s):  
Fracture Toughness ◽  
Shear Test ◽  
Mode Ii ◽  
Mode Ii Fracture ◽  
Mode Ii Fracture Toughness

An Investigation of the End-Notched Flexure and End-Loaded Split Tests Applied to the Mode II Interlaminar Fracture of a SiC/SiC Ceramic Matrix Composite

2020 ◽  
Vol 142 (4) ◽  
Author(s):  
Michael J. Presby ◽  
Manigandan Kannan ◽  
Gregory N. Morscher ◽  
Cody Godines ◽  
Amirhossein Eftekharian ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Test Methods ◽  
Test Method ◽  
Image Correlation ◽  
Mode Ii ◽  
Shear Stresses ◽  
Mode Ii Fracture ◽  
Mode Ii Fracture Toughness

Abstract Delamination is a common failure mode observed in ceramic matrix composites (CMCs) and occurs as a result of applied interlaminar tensile and shear stresses exceeding the interlaminar strength. As CMCs are further implemented into aero engines, the need to understand their interlaminar failure becomes increasingly important. While significant contributions have been made toward understanding the mode I fracture toughness of CMCs, limited work exists on mode II. Several test methods for measuring the mode II fracture toughness have been proposed in the literature, namely, the end-notched flexure (ENF) and the end-loaded split (ELS) tests. This work investigates the mode II fracture toughness of a melt-infiltrated SiC/SiC CMC at ambient temperature using the ENF and ELS test methods. Acoustic emission (AE), direct current potential drop (DCPD), and digital image correlation (DIC) are implemented as health monitoring techniques to monitor crack initiation and propagation. Results show reasonable correlation between the two test methods and that the ELS test method is better suited for characterizing R-curve behavior.

An Investigation of the End-Notched Flexure and End-Loaded Split Tests Applied to the Mode II Interlaminar Fracture of a SiC/SiC Ceramic Matrix Composite

2019 ◽  
Author(s):  
Michael J. Presby ◽  
K. Manigandan ◽  
Gregory N. Morscher ◽  
Cody Godines ◽  
Amir Eftekharian ◽  
...  
Keyword(s):  
Fracture Toughness ◽  
Ceramic Matrix Composites ◽  
Ceramic Matrix ◽  
Test Methods ◽  
Test Method ◽  
Image Correlation ◽  
Mode Ii ◽  
Shear Stresses ◽  
Mode Ii Fracture ◽  
Mode Ii Fracture Toughness

Abstract Delamination is a common failure mode observed in ceramic matrix composites (CMCs) and occurs as a result of applied interlaminar tensile and shear stresses exceeding the interlaminar strength. As CMCs are further implemented into aero engines the need to understand their interlaminar failure becomes increasingly important. While significant contributions have been made toward understanding the mode I fracture toughness of CMCs, limited work exists on mode II. Several test methods for measuring the mode II fracture toughness have been proposed in literature, namely the end-notched flexure (ENF) and the end-loaded split (ELS) tests. This work investigates the mode II fracture toughness of a melt-infiltrated SiC/SiC CMC at ambient temperature using the ENF and ELS test methods. Acoustic emission (AE), direct current potential drop (DCPD), and digital image correlation (DIC) are implemented as health monitoring techniques to monitor crack initiation and propagation. Results show reasonable correlation between the two test methods and that the ELS test method is better suited for characterizing R-curve behavior.

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