Variation law of equivalent bending stiffness of steel-cored aluminum stranded wire under bending

It is necessary to develop a technique that can be used to estimate cracks, which indicates a typical type of damage, using sensors to achieve the structural safety of circular steel-tube structural members widely used in infrastructures. Impedance techniques have been actively investigated to detect local damage, such as cracks. The cracks were estimated by experimentally investigating the relationship between the cracks and impedance signals using a damage index. The aim of this study is to investigate the correlation between the change in impedance signal and the change in the analytically obtained equivalent bending stiffness of cracked beams owing to crack formation and propagation in a circular steel-tube beam. In other words, the impedance signal was measured while gradually inducing cracking in circular steel-tube cantilever beams, two damage indices were obtained, and the results were compared with the analytically obtained equivalent bending stiffness of cracked beams constructed using an energy method. It was found that a close correlation between both the damage index for the impedance signal and equivalent bending stiffness for the crack location and the size of each damage case existed. Based on this correlation, the structural characteristics of the current state of a structure can be evaluated more accurately using the damage estimation results, and the behavior of the structure can be predicted using the analysis model.

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Bending properties of stainless steel dynamic compression plates and limited contact dynamic compression plates

Veterinary and Comparative Orthopaedics and Traumatology ◽

10.1055/s-0038-1632677 ◽

2001 ◽

Vol 14 (02) ◽

pp. 64-68 ◽

Cited By ~ 6

Author(s):

C. M. Hill ◽

T. Kageyama ◽

M. G. Conzemius ◽

G. K. Smith ◽

F. M. Little

Keyword(s):

Stainless Steel ◽

Fracture Healing ◽

Bending Strength ◽

Dynamic Compression ◽

Bending Stiffness ◽

Four Point Bending ◽

Plate Size ◽

Equivalent Bending Stiffness ◽

The Difference ◽

Strength And Stiffness

SummaryThe equivalent bending stiffness and bending strength of the stainless steel DCP and stainless steel LC-DCP were compared. Three plates, of each size, were tested destructively in ‘four point bending’. All of the LC-DCP were significantly less stiff and less strong than the comparable size DCP, with the exception of the 4.5 mm narrow LC-DCP which was significantly stronger and more stiff than the 4.5 mm narrow DCP (p <.01). The design advantages of the LC-DCP are ease and versatility of plate application and improved cortical blood flow which one assumes promotes fracture healing. Also, the lower recorded stiffness of the LC-DCP may be advantageous in that it decreases the stress protection of the plated bone. Since optimal strength and stiffness of bone plates are currently unknown, the clinical relevance of the decreased strength and stiffness of the LC-DCP has yet to be determined.Stainless steel LC-DCP and DCP of various sizes were tested in four point bending to ascertain equivalent bending stiffness and bending strength of each type of plate. The LC-DCP were consistently less stiff and strong than their DCP counterparts (p <.01) with the exception of the 4.5 mm Narrow LC-DCP which was stronger and more stiff than the 4.5 mm Narrow DCP. In general, as plate size increased. the difference between the two plate designs decreased. If it can be shown that there is not any detrimental effect on fracture healing, the design features of the LC-DCP make it a desirable choice for most fracture applications.

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Evaluation of Equivalent Bending Stiffness by Simplified Theoretical Solution for an FRP–aluminum Deck–truss Structure

KSCE Journal of Civil Engineering ◽

10.1007/s12205-018-1093-4 ◽

2018 ◽

Vol 23 (1) ◽

pp. 367-375 ◽

Cited By ~ 9

Author(s):

Dongdong Zhang ◽

Feng Li ◽

Fei Shao ◽

Chengfei Fan

Keyword(s):

Bending Stiffness ◽

Theoretical Solution ◽

Truss Structure ◽

Equivalent Bending Stiffness

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Research on Equivalent Bending Stiffness of Conical Inflated Beam

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.229-231.444 ◽

2012 ◽

Vol 229-231 ◽

pp. 444-448 ◽

Cited By ~ 1

Author(s):

Hui Feng Tan ◽

Zhen Yong Du

Keyword(s):

Theoretical Model ◽

Bending Stiffness ◽

Deflection Curve ◽

Differential Function ◽

Equivalent Bending Stiffness ◽

Load Deflection Curve

The conical inflated beams have steady bending stiffness before wrinkles appear according to experimental load-deflection curve, then the deflection distribute function is derived based on the differential function of deflection with variable bending stiffness. The equivalent bending stiffness is presented while the conical inflated beam equates to cylindrical inflated beam, according to the deflection formula of beam, the model of equivalent bending stiffness of conical inflated beams is obtained. Comparing the equivalent bending stiffness of conical inflated beams between theoretical model and Experiment results, it is found that they agree with each other well.

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Study on Equivalent Bending Stiffness of 1250mm2 Large Section Conductor

IOP Conference Series Materials Science and Engineering ◽

10.1088/1757-899x/562/1/012151 ◽

2019 ◽

Vol 562 ◽

pp. 012151

Author(s):

Chen Liu ◽

Jian Qin ◽

Jiancheng Wan ◽

Wenchuan Jing ◽

Chenghu Fan

Keyword(s):

Bending Stiffness ◽

Large Section ◽

Equivalent Bending Stiffness

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Buckling of Corrugated Ring under Uniform External Pressure

Symmetry ◽

10.3390/sym12081250 ◽

2020 ◽

Vol 12 (8) ◽

pp. 1250

Author(s):

Igor I. Andrianov ◽

Igor V. Andrianov ◽

Alexander A. Diskovsky ◽

Eduard V. Ryzhkov

Keyword(s):

Critical Pressure ◽

External Pressure ◽

Homogenization Method ◽

Bending Stiffness ◽

Engineering Practice ◽

Equivalent Stiffness ◽

Asymptotic Homogenization ◽

Uniform External Pressure ◽

Asymptotic Homogenization Method ◽

Equivalent Bending Stiffness

Stability analysis of a corrugated ring subjected to uniform external pressure is under consideration. Two main approaches to solving this problem are analyzed. The equivalent bending stiffness approach is often used in engineering practice. It is based on some plausible assumptions about the behavior of a structure. Its advantage is the simplicity of the obtained relations; the disadvantage is the difficulty in estimating the area of applicability. In this paper, we developed an asymptotic homogenization method for calculating the critical pressure for a corrugated ring, which made it possible to mathematically substantiate and refine the equivalent bending stiffness approach. To evaluate the results obtained using the equivalent stiffness approach and asymptotic homogenization method, the imperfection method is used. The influence of the corrugation parameters on buckling pressure is analyzed.

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