Dynamic Mode I Fracture Toughness Test of Composites Using a Kolsky Bar

2001 ◽  
Author(s):  
C. T. Sun ◽  
C. Han
Keyword(s):  
Fracture Toughness ◽  
Crack Propagation ◽  
Dynamic Fracture ◽  
Split Hopkinson Pressure Bar ◽  
Dynamic Fracture Toughness ◽  
Kolsky Bar ◽  
Dynamic Mode ◽  
Mode I ◽  
Fracture Toughness Test ◽  
Delamination Crack

Abstract Mode I dynamic delamination fracture was studied with two polymeric fiber reinforced composites. Wedge insertion fracture test on a Kolsky bar (or split Hopkinson pressure bar) apparatus was conducted. A speed about 1,000 m/s of Mode I delamination crack propagation was achieved using high rates of loading. Dynamic fracture and crack propagation were modeled by the finite element method. Dynamic initiation fracture toughnesses of both composites S2/8552 and IM7/977-3 were obtained. For IM7/977-3, dynamic fracture toughness of IM7/977-3 associated with the high speed of propagating crack was examined. It is found that the dynamic fracture toughness of the delamination crack propagating at speed up to 1,000 m/s approximately equals to the dynamic initiation fracture toughness, which is again approximately equal to the static fracture toughness.

Dynamic Fracture Toughness Testing for Welding Part of Nuclear Piping Using Normalization Data Reduction Technique

2006 ◽  
Vol 306-308 ◽  
pp. 73-78
Author(s):  
Yong Huh ◽  
Hyung Ick Kim ◽  
Chang Sung Seok
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
Data Reduction ◽  
Dynamic Test ◽  
Dynamic Fracture Toughness ◽  
Reduction Technique ◽  
Fracture Toughness Test ◽  
Static Test ◽  
Welding Part ◽  
Data Reduction Technique

In this study, we performed the static test of nuclear piping materials by the unloading compliance method and the normalization data reduction technique and obtained two fracture resistance curves (J-R curves). The two curves were similar, which proves that the normalization data reduction technique can be adopted in the static test. Then we performed the dynamic fracture toughness test for welding part of nuclear piping. The J-R curves were obtained from the dynamic test by the normalization data reduction technique and were compared to those of the static test results.

scholarly journals Dynamic Fracture Toughness of TaC/CNTs/SiC CMCs Prepared by Spark Plasma Sintering

2015 ◽  
Vol 2015 ◽  
pp. 1-8 ◽  
Author(s):  
Qiaoyun Xie ◽  
Sylvanus N. Wosu
Keyword(s):  
Fracture Toughness ◽  
Spark Plasma Sintering ◽  
Dynamic Fracture ◽  
Split Hopkinson Pressure Bar ◽  
Ceramic Matrix Composites ◽  
Dynamic Fracture Toughness ◽  
Polished Surface ◽  
Ceramic Samples ◽  
Plasma Sintering ◽  
Spark Plasma

This study focuses on the fracture toughness of TaC and carbon nanotubes (CNTs) reinforced SiC ceramic matrix composites (CMCs), prepared by spark plasma sintering (SPS) technique. A high densification of 98.4% was achieved under the sintering parameter of 133°C/min, 1800°C, and 90 MPa pressure. Vickers indentation was employed to measure the indentation toughness on the polished surface of ceramic samples, SEM was applied to directly observe the crack propagation after indentation, and split Hopkinson pressure bar (SHPB) was developed to determine the dynamic fracture toughness within the ceramic samples subjected to an impact in a three-point bending configuration.

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