scholarly journals Experimental and Numerical Investigation of Dynamic Fracture Toughness of Ceramic Composites

2020 ◽  
pp. 134-140
Author(s):  
Panagiotis J. Charitidis
Keyword(s):  
Fracture Toughness ◽  
Numerical Investigation ◽  
Charpy Impact ◽  
Testing Procedure ◽  
Ceramic Composites ◽  
Dynamic Fracture Toughness ◽  
Impact Testing ◽  
Dynamic Stress Intensity Factors ◽  
Continuous Carbon Fiber ◽  
Experimental Findings

This study focusses on the experimental and numerical investigation of the continuous carbon fiber-reinforced silicon carbide (SiC), and silicon nitride (Si3N4) matrix composites. A testing procedure has been designed to study the Charpy impact testing system. The dynamic elastic-plastic fracture toughness (JdSiC=11.88kJ/m2 and JdSi3N4=1.77kJ/m2) as well as the dynamic stress intensity factors (kdSiC=36.88 MPaem2and JdSi3N4=22.03 MPaem2) have been evaluated. Further on, a good agreement between finite element results and experimental findings was found.

scholarly journals The Charpy Impact Test of Rock (2nd Report)-Dynamic Fracture Toughness-

2006 ◽  
Vol 18 (1/2) ◽  
pp. 15-20
Author(s):  
Mitsumasa FURUZUMI ◽  
Fumio SUGIMOTO ◽  
Tadao IMAI ◽  
Naoto KAMOSHIDA ◽  
Masayoshi ABE
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
Impact Test ◽  
Charpy Impact ◽  
Charpy Impact Test ◽  
Dynamic Fracture Toughness

A methodological improvement of dynamic fracture toughness evaluations using an instrumented Charpy impact tester

1994 ◽  
Vol 04 (C8) ◽  
pp. C8-125-C8-130 ◽  
Author(s):  
T. Lorriot ◽  
E. Martin ◽  
J. M. Quenisset ◽  
S. Sahraoui ◽  
J. L. Lataillade
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
Charpy Impact ◽  
Dynamic Fracture Toughness ◽  
Methodological Improvement ◽  
Impact Tester

Determination of Dynamic Fracture Toughness Using Strain Measurement

2004 ◽  
Vol 261-263 ◽  
pp. 313-318 ◽  
Author(s):  
Duck Hoi Kim ◽  
Soon Il Moon ◽  
Jae Hoon Kim
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
Strain Measurement ◽  
Charpy Impact ◽  
Dynamic Fracture Toughness ◽  
High Rate ◽  
Energy Methods ◽  
Inertial Effects ◽  
Optimum Response

By contrast with static fracture toughness determination, the methodology for dynamic fracture toughness characterization is not yet standardized and appropriate approaches must be devised. The accurate determination of the dynamic stress intensity factors must take into account inertial effects. Most methods for dynamic fracture toughness measurement are experimentally complex. However, dynamic fracture toughness determination using strain measurement is extremely attractive in terms of experimental simplicity. In this study, dynamic fracture toughness tests using strain measurement are performed. High rate tension and charpy impact tests are carried out for titanium alloy, maraging steel and Al alloys. In the case of evaluating the dynamic fracture toughness using high rate tension and charpy impact tests, load or energy methods are used commonly. The consideration about inertial effects is essential, because load or energy methods are influenced by inertia. In contrast, if the position for optimum response of strain is provided, dynamic fracture toughness evaluation using strain near crack tip is more accurate. To obtain the position for optimum response of strain, a number of gages were attached at angles of 60°. Reliability for experimental results is evaluated by Weibull analysis. The method presented in this paper is easy to implement in a laboratory and it provides accurate results compared to results from load or energy methods influenced by inertia.

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