Characterization of Bolted Joint Behavior in SMC-R50

2008 ◽  
pp. 73-73-13
Author(s):  
DW Wilson
Keyword(s):  
Bolted Joint ◽  
Joint Behavior

Experimental Study on Performance Characterization of Bolted Joint Under Transverse Loading

Measurement ◽  
2021 ◽  
pp. 109608
Author(s):  
Zhifeng Liu ◽  
Mingpo Zheng ◽  
Jinfei Guo ◽  
Hongyan Chu ◽  
Xing Yan ◽  
...  
Keyword(s):  
Experimental Study ◽  
Bolted Joint ◽  
Transverse Loading ◽  
Performance Characterization

Metal to composite bolted joint behavior evaluated at impact rates of loading

2013 ◽  
Vol 106 ◽  
pp. 446-452 ◽  
Author(s):  
Andy VanderKlok ◽  
Abhishek Dutta ◽  
Srinivasan Arjun Tekalur
Keyword(s):  
Bolted Joint ◽  
Joint Behavior

Influence of Head Geometry on Bolted Joint Behavior

2002 ◽  
Vol 15 (4) ◽  
pp. 136-153 ◽  
Author(s):  
John D. Pratt ◽  
Gerard Pardoen
Keyword(s):  
Bolted Joint ◽  
Joint Behavior

Recovery of Preload in Bolted Joint Using Shape Memory Alloy Elements

2003 ◽  
Author(s):  
Mehrdaad Ghorashi ◽  
Daniel J. Inman
Keyword(s):  
Shape Memory Alloy ◽  
Shape Memory ◽  
Threshold Level ◽  
Design Stage ◽  
Strain Gauges ◽  
Self Healing ◽  
Bolted Joint ◽  
Cross Sectional ◽  
Bolt Preload ◽  
Joint Behavior

One of the main problems with a bolted joint is losing its preload. In this situation, it cannot provide the required clamping force needed to keep the joint members together or prevent fluid leakages. Although every effort is usually made at the design stage to prevent such failure, because of the numerous factors present in the problem, these efforts are not always successful. After loosening occurs, the joint should be retightened to regain its preload. However, there are circumstances where the joint is very important but it is not easily accessible and retightening cannot be done manually. The shape memory effect (SME) property can be used in such circumstances to produce the necessary preload. The shape memory alloy (SMA) element should be activated if monitoring the bolt preload through the application of strain gauges shows that the preload has fallen below a pre-determined threshold level. This paper presents a mathematical model for the SMA element and the whole joint behavior. The relation between SMA activation (corresponding to the amount of phase change in the SMA) and the resulting preload is estimated. To this end, it is assumed that the SMA element behaves in such a way that either its cross-sectional area or its volume remain constant. The analysis of this model shows the feasibility of the application of SMA for producing the required preload. Hence, if used properly, the required preload is achieved and a self-healing joint is obtained.

Analysis of Lowering Effects in Aluminum Single-Layer Latticed Dome with Temcor Joints

2016 ◽  
Vol 710 ◽  
pp. 390-395
Author(s):  
Shuai Xu ◽  
Zhi Hua Chen ◽  
Federico M. Mazzolani
Keyword(s):  
Load Distribution ◽  
Single Layer ◽  
Fe Model ◽  
Load Carrying Capacity ◽  
Load Bearing Capacity ◽  
Initial Imperfections ◽  
Load Carrying ◽  
Joint Behavior

The numerical analysis of a single-layer latticed dome has been carried out by using ANSYS, in order to evaluate the effect of influencing factors, like semi-rigidity of joint, buckling in compressed bars, load distribution and initial imperfections, which can produce important reductions of the load bearing capacity of these kind of structures. As a case study, the use of Temcor joint has been investigated. The characterization of the Temcor joint behavior to be introduced in the global model of the dome has been done by a FE model implemented on ABAQUS. The effects of the analyzed factors on the load-carrying capacity of the dome have been identified and useful suggestions for the design of this type of structures have been given.

Effect of Underhead Design Configuration on Bolt Behavior Under Shear Loads

2015 ◽  
Author(s):  
Zhijun Wu ◽  
Sayed A. Nassar
Keyword(s):  
Finite Element ◽  
Mechanical Behavior ◽  
Transverse Shear ◽  
Shear Load ◽  
Bolted Joint ◽  
Shear Loads ◽  
Element Simulation ◽  
Bolt Preload ◽  
Bolted Flange ◽  
Joint Behavior

This study uses nonlinear 3-D finite element simulation to investigate the effect of bolt underhead design on its mechanical behavior under cyclic transverse shear loads. The effect of bolt underhead fillet radius and / or under-cut on bolt deformation as well as bolted joint behavior is studied in order to optimize the bolted flange performance under externally applied loads. Two levels of bolt preload and two transverse shear load cycles are studied. Bolt tensile and bending stiffnesses for various underhead designs are also evaluated and discussed.

scholarly journals A Review of the T-Stub Components for the Analysis of Bolted Moment Joints

2021 ◽  
Vol 11 (22) ◽  
pp. 10731
Author(s):  
Giovani Jesus Berrospi Aquino ◽  
Ana María Gómez Amador ◽  
Jorge Hernan Alencastre Miranda ◽  
Juan José Jiménez de Cisneros Fonfría
Keyword(s):  
Numerical Simulation ◽  
Analytical Method ◽  
State Of The Art ◽  
The State ◽  
Bolted Joint ◽  
Tension And Compression

The analytical method for the calculation of the properties of a bolted joint established by the structural Eurocodes proposes the T-stub as a component for the characterization of the tension and compression zones in moment joints. In this article, a review of the state of the art on the T-stub component is developed, where the works developed since it was initially defined, and from the perspectives of formulation, experimentation and numerical simulation are summarized and discussed. Additionally, possible future lines of work are proposed.

Morphological Characterization of Mycobacteriophage R1

1974 ◽  
Vol 32 ◽  
pp. 254-255
Author(s):  
B. L. Soloff ◽  
T. A. Rado
Keyword(s):  
Carbon Source ◽  
Stationary Phase ◽  
Growth Phase ◽  
Minimal Medium ◽  
Morphological Characterization ◽  
Logarithmic Growth Phase ◽  
Complete Lysis ◽  
Lysogenic Culture ◽  
Logarithmic Growth

Mycobacteriophage R1 was originally isolated from a lysogenic culture of M. butyricum. The virus was propagated on a leucine-requiring derivative of M. smegmatis, 607 leu−, isolated by nitrosoguanidine mutagenesis of typestrain ATCC 607. Growth was accomplished in a minimal medium containing glycerol and glucose as carbon source and enriched by the addition of 80 μg/ ml L-leucine. Bacteria in early logarithmic growth phase were infected with virus at a multiplicity of 5, and incubated with aeration for 8 hours. The partially lysed suspension was diluted 1:10 in growth medium and incubated for a further 8 hours. This permitted stationary phase cells to re-enter logarithmic growth and resulted in complete lysis of the culture.

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