Study of loading rate effect on dynamic fracture toughness of high strength steel under impact loading

2010 ◽  
Vol 6 (1-2) ◽  
pp. 17-23
Author(s):  
Xu Zejian ◽  
Li Yulong
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
Impact Loading ◽  
High Strength Steel ◽  
Loading Rate ◽  
High Strength ◽  
Dynamic Fracture Toughness ◽  
Rate Effect

scholarly journals The Loading Rate Effect on the Fracture Toughness of Marble Using Semicircular Bend Specimens

Geofluids ◽  
2020 ◽  
Vol 2020 ◽  
pp. 1-8
Author(s):  
Fengqiang Gong ◽  
Yunliang Wang ◽  
Shanyong Wang
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
Loading Rate ◽  
Testing Machine ◽  
Continuous Model ◽  
Dynamic Fracture Toughness ◽  
Rate Effect ◽  
High Loading ◽  
Quantitative Relation ◽  
Dynamic Increase Factor

A series of dynamic fracture experiments on semicircular bend (SCB) marble specimens were conducted to characterize the loading rate effect using the INSTRON testing machine and the modified SHPB testing system. The fracture toughness of the marble specimens was measured from a low loading rate to a high loading rate (10-3~106 MPa·m1/2s-1). The results show that the fracture toughness will increase with the loading rate. Since the fracture toughness at a magnitude of 10-3 MPa·m1/2s-1 is regarded as the static fracture toughness, the specific value of DI F f (the dynamic increase factor of fracture toughness) can be obtained at the other loading magnitudes from dynamic fracture tests. To describe the variation in DI F f from low to high loading rates, a new continuous model of DI F f was put forward to express the quantitative relation between the loading rate and rock dynamic fracture toughness. It is shown that the new DI F f model can accurately describe the loading rate effect on the dynamic fracture testing data for rock materials.

scholarly journals Mechanical behavior of patched steel panels at elevated temperatures

2019 ◽  
Vol 1 (1) ◽  
Author(s):  
S Surendran ◽  
G L Manjunath ◽  
S K Lee
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
High Strength Steel ◽  
High Strength ◽  
Dynamic Fracture Toughness ◽  
Fiber Reinforced ◽  
Fiber Reinforced Plastic ◽  
Reinforced Plastic ◽  
Steel Panels ◽  
The Impact

Preventive maintenance is an accepted practice in engineering to keep the structural reliability of ship hulls at the highest possible level. Designers ensure a longer period in between the consecutive maintenance of ship hull parts to optimize expenditure. This is relevant in view of the difficulty in reaching farthest corners in ballast tanks, fuel storage tanks, cofferdams etc. Prior maintenance of the deck and hull parts save a considerable amount of the owner’s budget.A portable technology like patching becomes more handy and economic. Performance of both unpatched and patched samples during dynamic loading conditions being examined in the present investigation. The high strength steel panels with a dimension of 70mm×15mm×3mm were edge cracked for lengths of 4mm and 7mm, with width of 1mm for both. The edge cracked high strength steel panels are repaired with composite patches using GFRP (glass fiber reinforced plastic), CFRP (carbon fiber reinforced plastic) and AFRP (aramid fiber reinforced plastic). The patching was done by 3 and 5 layered and impact tested by Charpy impact tester at ranges of high temperatures. The amount of energy absorbed in the impact is converted to dynamic fracture toughness values and compared for evaluating the performance of FRP (fiber reinforced plastics). Finite element analysis was done for evaluating the stress intensity factors at different types of patching and testing conditions. Comparatively the AFRP patched samples showed better dynamic fracture toughness values at different temperatures.

Investigation of loading rate and plate thickness effects in dynamic fracture toughness of PMMA

1997 ◽  
Vol 57 (4) ◽  
pp. 459-460
Author(s):  
H. Wada ◽  
M. Seika ◽  
T.C. Kennedy ◽  
C.A. Calder ◽  
K. Murase
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
Loading Rate ◽  
Plate Thickness ◽  
Dynamic Fracture Toughness

Dynamic Fracture Toughness of High-Strength 5KhN3МА Steel

2021 ◽  
Vol 2021 (9) ◽  
pp. 1051-1059
Author(s):  
L. R. Botvina ◽  
M. R. Tyutin ◽  
Yu. S. Perminova ◽  
A. V. Utkin
Keyword(s):  
Fracture Toughness ◽  
Dynamic Fracture ◽  
High Strength ◽  
Dynamic Fracture Toughness

Fracture Properties of PCBN as a Function of Loading Rate

2009 ◽  
Vol 417-418 ◽  
pp. 669-672 ◽  
Author(s):  
Declan Carolan ◽  
M. Petrović ◽  
Alojz Ivanković ◽  
Neal Murphy
Keyword(s):  
Fracture Toughness ◽  
Boron Nitride ◽  
Impact Loading ◽  
Superhard Material ◽  
Loading Rate ◽  
Cubic Boron Nitride ◽  
Numerical Approach ◽  
Dynamic Fracture Toughness ◽  
Fracture Properties ◽  
Polycrystalline Cubic Boron Nitride

Polycrystalline Cubic Boron Nitride (PCBN) is a superhard material which is used in machining of hardened steels and other abrasive and aerospace grade alloys. In these applications the tools are subjected to high operating temperatures, abrasive and impact loading. Impact loading can lead to the sudden fracture and hence failure of the tool. In this work the static and dynamic fracture toughness of PCBN is determined via a combined experimental-numerical approach. The results show that the fracture toughness of PCBN varies with loading rate.

BETHLEHEM V-STAR 50

Alloy Digest ◽  
1989 ◽  
Vol 38 (7) ◽  
Keyword(s):  
Fracture Toughness ◽  
Physical Properties ◽  
Tensile Properties ◽  
Impact Loading ◽  
High Strength Steel ◽  
High Strength ◽  
Rolled Steel ◽  
Bethlehem Steel Corporation ◽  
Steel Corporation ◽  
Welding Processes

Abstract BETHLEHEM V-STAR 50 is an as-rolled steel for and H-and sheet piling sections. It offers the design benefits of high-strength steel economically. It is particularly good where impact loading is encountered. It is readily weldable using conventional welding processes. This datasheet provides information on composition, physical properties, elasticity, and tensile properties as well as fracture toughness. It also includes information on joining. Filing Code: SA-438. Producer or source: Bethlehem Steel Corporation.

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