Fatigue crack density of asphalt binders under controlled-stress rotational shear load testing

2021 ◽  
Vol 272 ◽  
pp. 121899
Author(s):  
Chenguang Shi ◽  
Xing Cai ◽  
Xingyu Yi ◽  
Tianling Wang ◽  
Jun Yang
Keyword(s):  
Fatigue Crack ◽  
Crack Density ◽  
Asphalt Binders ◽  
Shear Load ◽  
Load Testing ◽  
Rotational Shear

Assuring Tube-to-Tubesheet Joint Tightness and Strength

2012 ◽  
Vol 134 (6) ◽  
Author(s):  
Stanley Yokell
Keyword(s):  
Pressure Vessel ◽  
Shear Load ◽  
Load Testing ◽  
Visual Examination ◽  
Intended Purpose ◽  
Digital Microscope

This paper describes preparing mockup tubesheet specimens for visual examination using a digital microscope to determine that tube-to-tubesheet joint welds are of the specified size and that expanded joints are satisfactory for the intended purpose. It discusses nondestructive examinations (NDE) of the tubesheets and tube joints intended to assure achieving sufficient tightness and strength to satisfy the uses to which the exchangers will be put. This paper refers to the ASME Boiler and Pressure Vessel Code (Code) paragraphs that apply to tube joint welds and expanded joints including shear load testing when the Code requires it [1]. The discussion also addresses the need for manufacturers to have qualified tube joining procedures and personnel qualified to use the qualified procedures. The work concludes with a summary of ways to assure tube joint tightness and strength.

Shear load testing of hollow core slabs

2016 ◽  
pp. 1084-1091
Author(s):  
G. Schacht ◽  
G. Bolle ◽  
St. Marx
Keyword(s):  
Shear Load ◽  
Load Testing ◽  
Hollow Core

scholarly journals A Quality Study of a Self-Piercing Riveted Joint between Vibration-Damping Aluminum Alloy and Dissimilar Materials

2020 ◽  
Vol 10 (17) ◽  
pp. 5947
Author(s):  
Dong Hyuck Kam ◽  
Taek Eon Jeong ◽  
Jedo Kim
Keyword(s):  
Aluminum Alloy ◽  
Failure Modes ◽  
Mechanical Performance ◽  
Dissimilar Materials ◽  
Vibration Damping ◽  
Shear Load ◽  
Load Testing ◽  
Tensile Shear ◽  
Reinforced Plastic ◽  
Riveted Joints

This study investigates the quality of self-piercing riveted joints between vibration-damping aluminum (Al) and other dissimilar materials, namely aluminum alloy (AL5052-H32), steel alloy (GA590DP), and carbon-reinforced plastic (CFRP). The effects of die types (flat, cone, and nipple) on the geometrical characteristics and mechanical performance of the joints are studied using a cross-section examination and tensile shear load testing. The failure modes of each joint are also presented, showing the nature of the forces leading to the joint failures. The results indicate that, for all configurations, adequate joining between vibration-damping Al with AL5052-H32 is expected with a maximum shear load up to 3.28 kN. A shear load up to 3.6 kN was measured for the joints with GA590DP panels with acceptable top and bottom seal characteristics. A vibration-damping Al panel can only be positioned at the bottom when riveting with CFRP due to the brittle nature of CFRP. A tensile shear load up to 2.26 kN was found, which is the lowest amongst the materials tested in this study.

Full-Scale Cyclic Rotation and Shear-Load Testing of Double Web with Top and Seat Angle Beam-Column Connections

2020 ◽  
Vol 146 (8) ◽  
pp. 04020164
Author(s):  
Thierry Béland ◽  
Robert Tremblay ◽  
Eric M. Hines ◽  
Larry A. Fahnestock
Keyword(s):  
Full Scale ◽  
Shear Load ◽  
Load Testing ◽  
Seat Angle

Assuring Tube-to-Tubesheet Joint Tightness and Strength

2011 ◽  
Author(s):  
Stanley Yokell
Keyword(s):  
Pressure Vessel ◽  
Shear Load ◽  
Load Testing ◽  
Visual Examination ◽  
Intended Purpose ◽  
Digital Microscope

This paper describes preparing mockup tubesheet specimens for visual examination using a digital microscope to determine that tube joint welds are of the specified size and that expanded joints are satisfactory for the intended purpose. It discusses nondestructive examinations (NDE) of tubesheets and tube joints intended to assure achieving sufficient tightness and strength to satisfy the uses to which the exchangers will be put. The paper refers to the ASME Boiler and Pressure Vessel Code (Code) paragraphs that apply to tube joint welds and expanded joints including shear load testing when the Code requires it.[1] The discussion also addresses the need for manufacturers to have qualified tube joining procedures and personnel who use the procedures. The work concludes with a summary of ways to assure tube joint tightness and strength.

Parametric investigation of the effects of load level on fatigue crack growth in trabecular bone based on artificial neural network computation

2020 ◽  
Vol 234 (8) ◽  
pp. 784-793
Author(s):  
Marouane El Mouss ◽  
Said Zellagui ◽  
Makrem Nasraoui ◽  
Ridha Hambli
Keyword(s):  
Neural Network ◽  
Artificial Neural Network ◽  
Fatigue Crack ◽  
Crack Length ◽  
Cancellous Bone ◽  
Volume Fraction ◽  
Crack Density ◽  
Load Level ◽  
Parametric Investigation ◽  
Artificial Neural

This study reports the development of an artificial neural network computation model to predict the accumulation of crack density and crack length in cancellous bone under a cyclic load. The model was then applied to conduct a parametric investigation into the effects of load level on fatigue crack accumulation in cancellous bone. The method was built in three steps: (1) conducting finite element simulations to predict fatigue growth of different three-dimensional micro-computed tomography cancellous bone specimens considering input combinations based on a factorial experimental design; (2) performing a training stage of an artificial neural network based on the results of step 1; and (3) applying the trained artificial neural network to rapidly predict the crack density and the crack length growth for cancellous bone under a cyclic loading for a given applied apparent strain, cycle frequency, bone volume fraction, bone density and apparent elastic modulus.

Shear load testing of damaged hollow-core slabs

2017 ◽  
Vol 18 (4) ◽  
pp. 607-617 ◽  
Author(s):  
Gregor Schacht ◽  
Steffen Marx ◽  
Guido Bolle
Keyword(s):  
Shear Load ◽  
Load Testing ◽  
Hollow Core
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