scholarly journals Analysis of the impact of position in fatigue cracks on the fracture toughness of thick-walled pressure vessel material

2016 ◽  
Vol 2 ◽  
pp. 2982-2988
Author(s):  
Nedeljko Vukojević ◽  
Nenad Gubeljak ◽  
Muamer Terzic ◽  
Fuad Hadžikadunić
Keyword(s):  
Fracture Toughness ◽  
Pressure Vessel ◽  
Fatigue Cracks ◽  
Vessel Material ◽  
The Impact

CARELSO 60/65

Alloy Digest ◽  
2011 ◽  
Vol 60 (10) ◽  
Keyword(s):  
Fracture Toughness ◽  
Tensile Properties ◽  
Pressure Vessel ◽  
Heat Treating ◽  
Steel Alloy ◽  
Vessel Material ◽  
Sour Service

Abstract CarElso 60/65 is a steel alloy with special melt practice producing a pressure vessel material with resistance to mild sour service. This datasheet provides information on composition and tensile properties as well as fracture toughness. It also includes information on forming, heat treating, and joining. Filing Code: SA-635. Producer or source: Industeel USA, LLC.

CARELSO 70 SOHIC

Alloy Digest ◽  
2009 ◽  
Vol 58 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Tensile Properties ◽  
Pressure Vessel ◽  
Steel Alloy ◽  
Temperature Performance ◽  
Hydrogen Induced Cracking ◽  
Resistance To Stress ◽  
Vessel Material

Abstract CarElso 70 SOHIC is a steel alloy with special melt practice producing a pressure vessel material with excellent resistance to stress-oriented hydrogen-induced cracking (SOHIC). This datasheet provides information on composition, hardness, and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming and joining. Filing Code: SA-590. Producer or source: Industeel USA, LLC.

Brittle Fracture Prevention Model for Pressure Based on Master Curve Approach

2016 ◽  
Vol 139 (1) ◽  
Author(s):  
QingFeng Cui ◽  
Hu Hui ◽  
PeiNing Li ◽  
Feng Wang
Keyword(s):  
Fracture Toughness ◽  
Brittle Fracture ◽  
Impact Toughness ◽  
Pressure Vessel ◽  
Master Curve ◽  
Fracture Prevention ◽  
Pressure Vessels ◽  
New Model ◽  
Prevention Model ◽  
The Impact

The brittle fracture prevention model is of great importance to the safety of pressure vessels. Compared to the semi-empirical approach adopted in various pressure vessel standards, a model based on Master Curve technique is developed in this paper. Referring to ASME nuclear code, the safety features including the lower bound fracture toughness and a margin factor equal to 2 for the stress intensity factor produced by primary stress are adopted in the new model. The technical background of the brittle fracture model in ASME VIII-2 has been analyzed and discussed, and then its inappropriate items have been modified in the new model. Minimum design temperature curves, impact toughness requirements, and temperature adjustment for low stress condition are established on the basis of new model. The comparison with the relevant curves in ASME VIII-2 is also made. The applicability of the new model is verified by the measured fracture toughness and impact toughness data of several kinds of pressure vessel steels. The results suggest that the minimum design temperature and the impact test requirements derived by the new model are compatible with each other. More testing data of different steels to check this model is necessary for further engineering application.

CARELSO 70 HIC

Alloy Digest ◽  
2009 ◽  
Vol 58 (1) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
High Temperature ◽  
Tensile Properties ◽  
Pressure Vessel ◽  
Heat Treating ◽  
Steel Alloy ◽  
Temperature Performance ◽  
Hydrogen Induced Cracking ◽  
Vessel Material

Abstract CarElso 70 HIC is a steel alloy with special melt practice producing a clean, normalized pressure vessel material with excellent resistance to hydrogen-induced cracking (HIC). This datasheet provides information on composition and tensile properties as well as fracture toughness. It also includes information on high temperature performance and corrosion resistance as well as forming, heat treating, and joining. Filing Code: SA-588. Producer or source: Industeel USA, LLC. Originally published November 2008, revised January 2009.

CARELSO 60/65 HIC

Alloy Digest ◽  
2008 ◽  
Vol 57 (9) ◽  
Keyword(s):  
Fracture Toughness ◽  
Corrosion Resistance ◽  
Tensile Properties ◽  
Pressure Vessel ◽  
Heat Treating ◽  
Steel Alloy ◽  
Hydrogen Induced Cracking ◽  
Vessel Material

Abstract CarElso 60/65 HIC is a steel alloy with special melt practice producing a pressure vessel material with excellent resistance to hydrogen-induced cracking (HIC). This datasheet provides information on composition and tensile properties as well as fracture toughness. It also includes information on corrosion resistance as well as forming, heat treating, and joining. Filing Code: SA-584. Producer or source: Industeel USA, LLC.

Effect of toughened polyamide-coated carbon fiber fabric on the mechanical performance and fracture toughness of CFRP

2021 ◽  
pp. 002199832199945
Author(s):  
Jong H Eun ◽  
Bo K Choi ◽  
Sun M Sung ◽  
Min S Kim ◽  
Joon S Lee
Keyword(s):  
Mechanical Properties ◽  
Fracture Toughness ◽  
Photoelectron Spectroscopy ◽  
Mechanical Performance ◽  
Epoxy Composites ◽  
Scanning Calorimetry ◽  
Internal Damage ◽  
Impact Tests ◽  
Flexural Tests ◽  
The Impact

In this study, carbon/epoxy composites were manufactured by coating with a polyamide at different weight percentages (5 wt.%, 10 wt.%, 15 wt.%, and 20 wt.%) to improve their impact resistance and fracture toughness. The chemical reaction between the polyamide and epoxy resin were examined by fourier transform infrared spectroscopy, differential scanning calorimetry and X-ray photoelectron spectroscopy. The mechanical properties and fracture toughness of the carbon/epoxy composites were analyzed. The mechanical properties of the carbon/epoxy composites, such as transverse flexural tests, longitudinal flexural tests, and impact tests, were investigated. After the impact tests, an ultrasonic C-scan was performed to reveal the internal damage area. The interlaminar fracture toughness of the carbon/epoxy composites was measured using a mode I test. The critical energy release rates were increased by 77% compared to the virgin carbon/epoxy composites. The surface morphology of the fractured surface was observed. The toughening mechanism of the carbon/epoxy composites was suggested based on the confirmed experimental data.

Concrete and Fiber Reinforced Concrete Subjected to Impact Loading

1985 ◽  
Vol 64 ◽  
Author(s):  
Surendra P. Shah
Keyword(s):  
Fracture Toughness ◽  
Tensile Strength ◽  
Reinforced Concrete ◽  
Impact Resistance ◽  
Fiber Reinforced Concrete ◽  
Basic Material ◽  
Strain History ◽  
Moderate Increase ◽  
Fiber Reinforced ◽  
The Impact

ABSTRACTDespite its extensive use, low tensile strength has been recognized as one of the major drawbacks of concrete. Although one has learned to avoid exposing concrete structures to adverse static tensile load, these cannot be shielded from short duration dynamic tensile stresses. Such loads originate from sources such as impact from missiles and projectiles, wind gusts, earthquakes and machine vibrations. The need to accurately predict the structural response and reserve capacity under such loading has led to an interest in the mechanical properties of the component materials at high rates of straining.One method to improve the resistance of concrete when subjected to impact and/or impulsive loading is by the incorporation of randomly distributed short fibers. Concrete (or Mortar) so reinforced is termed fiber reinforced concrete (FRC). Moderate increase in tensile strength and significant increases in energy absorption (toughness or impact-resistance) have been reported by several investigators in static tests on concrete reinforced with randomly distributed short steel fibers. A theoretical model to predict fracture toughness of FRC is proposed. This model is based on the concept of nonlinear elastic fracture mechanics.As yet no standard test methods are available to quantify the impact resistance of such composites, although several investigators have employed a variety of tests including drop weight, swinging pendulums and the detonation of explosives. These tests though useful in ascertaining the relative merits of different composites do not yield basic material characteristics which can be used for design.The author has recently developed an instrumented Charpy type of impact test to obtain basic information such as load-deflection relationship, fracture toughness, crack velocity and load-strain history during an impact event. From this information, a damage based constitutive model was proposed. Relative improvements in performance due to the addition of fibers as observed in the instrumented tests are also compared with other conventional methods.

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