Peculiarities of bolt stress distribution in standard flanged joints when the pipe is subjected to transverse loading

1968 ◽  
Vol 4 (5) ◽  
pp. 372-376
Author(s):  
L. P. Karasev ◽  
Ya. V. Shuliko
Keyword(s):  
Stress Distribution ◽  
Transverse Loading ◽  
Bolt Stress

Equilibrium Displacement and Stress Distribution in a Two-Dimensional, Axially Moving Web Under Transverse Loading

1995 ◽  
Vol 62 (3) ◽  
pp. 772-779 ◽  
Author(s):  
C. C. Lin ◽  
C. D. Mote
Keyword(s):  
Stress Distribution ◽  
Plate Theory ◽  
Transverse Load ◽  
Transverse Displacement ◽  
Transverse Loading ◽  
Closed Form Solutions ◽  
Coupled Equations ◽  
Axially Moving ◽  
Axially Moving Web ◽  
The Web

Von Karman nonlinear plate equations are modified to describe the motion of a wide, axially moving web with small flexural stiffness under transverse loading. The model can represent a paper web or plastic sheet under some conditions. Closed-form solutions to two nonlinear, coupled equations governing the transverse displacement and stress function probably do not exist. The transverse forces arising from the bending stiffness are much smaller than those arising from the applied axial tension except near the edges of the web. This opens the possibility that boundary layer and singular perturbation theories can be used to model the bending forces near the edges of the web when determining the equilibrium solution and stress distribution. The present analysis is applied to two examples: (I) a web deflecting under its own uniformly distributed weight; (II) a web deflecting under a transverse load whose distribution is described by the product of sine functions in the axial and width directions. Membrane theory and linear plate theory solutions are used to characterize the importance of the web deformation solutions.

Numerical Analysis on Effect of Rock Rheology on Fully-Grounded MFRP Bolt Stress

2012 ◽  
Vol 594-597 ◽  
pp. 362-365
Author(s):  
Juan Li ◽  
Bai Lin Zheng
Keyword(s):  
Rock Mass ◽  
Numerical Analysis ◽  
Stress Distribution ◽  
Geotechnical Engineering ◽  
Time Effect ◽  
Secondary Creep ◽  
Bolt Stress ◽  
Rock Rheology

As to the time effect of prestress in bolt in geotechnical engineering, the stress distribution in fully-grounded MFRP bolt and its trend influenced by rock rheology is obtained by FEM. The Burgers body which is able to model the primary and secondary creep regions of the rock mass is applied to analyze the time effect of prestress in MFRP bolt. The results show that rock rheology has a great effect on MFRP bolt stress.

The stress distribution near a loading point in a uniform flanged beam

1952 ◽  
Vol 244 (886) ◽  
pp. 417-467 ◽  
Keyword(s):  
Stress Distribution ◽  
Maximum Stress ◽  
Elementary Theory ◽  
Steel Beam ◽  
Stress Distributions ◽  
Transverse Loading ◽  
Stress Concentrations ◽  
The Subject ◽  
Concentration Factors ◽  
Good Agreement

The elementary theory of bending, which is the method by which the stresses in a uniform flanged beam subjected to transverse loading are usually determined, leads to certain incompatibilities of displacement and stress distribution near a section of the beam at which load is applied. The present paper endeavours to remedy these deficiencies. Two main cases are considered: that in which the beam is loaded through the web and that in which it is loaded through the flanges. In both of these the analyses lead to stress concentrations in the outer fibres of the flanges, and it is found that the maximum stress concentrations, which occur at the loading section, may be expressed with an accuracy sufficient for most engineering purposes by means of simple formulae. For both cases, maximum concentration factors occur in short beams having large flanges and thin webs. Results of strain-gauge tests carried out on mild steel beam specimens are presented which show very good agreement between the predicted and experimental stress distributions in the flanges, and a further part of the paper compares the present analyses with other recent work on the subject.

The concerted use of SEM, TEM, and SCM for examination of resin-dentin interfaces

1994 ◽  
Vol 52 ◽  
pp. 476-477
Author(s):  
B. Van Meerbeek ◽  
L. J. Conn ◽  
E. S. Duke
Keyword(s):  
Surface Layer ◽  
Stress Distribution ◽  
Phosphoric Acid ◽  
Bonding Mechanism ◽  
Restorative Dentistry ◽  
Dental Adhesive ◽  
Low Viscosity ◽  
Dentin Adhesives ◽  
Acid Etch ◽  
Tooth Tissue

Restoration of decayed teeth with tooth-colored materials that can be bonded to tooth tissue has been a highly desirable property in restorative dentistry for many years. Advantages of such an adhesive restorative technique over conventional techniques using non-adhesive metal-based restoratives include improved restoration retention with minimal sacrifice of sound tooth tissue for retention purposes, superior adaptation and sealing of the restoration margins in prevention of caries recurrence, improved stress distribution across the tooth-restoration interface throughout the whole tooth, and even reinforcement of weakened tooth structures. The dental adhesive technology is rapidly changing. An efficient resin bond to enamel has already long been achieved. Its bonding mechanism has been fully elucidated and has proven to be a durable and reliable clinical treatment. However, bonding to dentin represents a greater challenge. After the failures of a dentin acid-etch technique in imitation of the enamel phosphoric-acid-etch technique and a bonding procedure based on chemical adhesion, modern dentin adhesives are currently believed to bond to dentin by a micromechanical hybridization process. This process is developed by an initial demineralization of the dentin surface layer with acid etchants exposing a collagen fibril arrangement with interfibrillar microporosities that subsequently become impregnated by low-viscosity monomers. Although the development of such a hybridization process has well been documented in the literature, questions remain with respect to parameters of-primary importance to adhesive efficacy.

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