Mechanical behaviors of the Assembled Hub (AH) joints subjected to bending moment

2017 ◽  
Vol 138 ◽  
pp. 806-822 ◽  
Author(s):  
Qinghua Han ◽  
Yiming Liu ◽  
Jinyuan Zhang ◽  
Ying Xu
Keyword(s):  
Bending Moment ◽  
Mechanical Behaviors

Effect of Material and Work Status of Vascular Stents on Flexibility Property of Stents

2014 ◽  
Vol 538 ◽  
pp. 323-327
Author(s):  
Xiang Shen ◽  
Xiao Zhou ◽  
Tao Ge
Keyword(s):  
Mechanical Property ◽  
Finite Element Method ◽  
Stainless Steel ◽  
Bending Moment ◽  
Work Status ◽  
Mechanical Behaviors ◽  
Vascular Stent ◽  
Vascular Stents ◽  
Flexibility Property ◽  
Better Than

Flexibility is an important mechanical property of stent. The primary aim of this investigation is to evaluate the effect of material and work status of vascular stent on the flexibility of stent using finite element method (FEM). Uniform bending moment was applied to unit models of stents with the help of multipoint constraint element. The results show that the flexibility of biodegradable pure iron stent is better than one of stainless steel stent. Among three work statuses of stents, the flexibility of expanded stent is the worst, while the flexibility of crimped stent is the best. In conclusion, FEM can quantify stent mechanical behaviors related to flexibility and help surgeons to select favorable stents and help designers to pretest and improve flexibility of new stents.

Mechanical Characteristics of Three-Truss Plate-Truss Composite Bridges on High-Speed Railways

2014 ◽  
Vol 590 ◽  
pp. 358-362 ◽  
Author(s):  
Yan Qun Han ◽  
Mei Xin Ye
Keyword(s):  
Finite Element Analysis ◽  
High Speed ◽  
Mechanical Characteristics ◽  
Bending Moment ◽  
The Other ◽  
Mechanical Behaviors ◽  
Element Analysis ◽  
Composite Bridges ◽  
Numerical Finite Element ◽  
Vertical Bending Moment

This paper presents a study on mechanical behaviors of three-truss plate-truss composite bridges. Both a model test and numerical finite element analysis (FEA) have been conducted. The results indicate that the deck load is allocated to each truss in twice. The first allocation is among the panel points of bottom chord elements (tie beams), and the other through lateral bracings. When the stiffness of each truss (arch) is approximate, the load allocated to middle truss is about two times more than that in edge truss in the first allocation, and the second allocation makes the load tend to approximate among 3 trusses. But the vertical bending moment of bottom chord elements and the axial force of spandrel hangers in middle truss are about twice as that in the edge truss, which should be paid attention to. The results will be useful as references for design of three-truss plate-truss composite bridges.

The Study of Mechanical Behaviors Performance of Bearing Form's Influence on Small-Radius Bridge

2011 ◽  
Vol 255-260 ◽  
pp. 776-780
Author(s):  
Mao Qi Li
Keyword(s):  
Finite Element ◽  
Finite Element Model ◽  
Reaction Force ◽  
Bending Moment ◽  
Element Model ◽  
Small Radius ◽  
Structural Method ◽  
Mechanical Behaviors ◽  
Lattice Method ◽  
Longitudinal Bending

With the structural method, the "bending - twisting" coupling of the curve bridge is possible. As the small-radius bridge’s radius become smaller and smaller, the "Bending-Twisting" coupling become more and more common in order to discuss and verify the mechanical behaviors performance of supports' influence on small-radius bridge. This is done by changing the small-radius bridge’s supporting approach, using girder lattice method to construct a finite element model, analysis on a small-radius bridge of supporting longitudinal bending moment, torque and the influence of reaction force. The data shows that the double supports can reduce the small-radius bridge’s torque, make the medial and lateral support bearings equal reaction, make the small-radius bridge’s mechanical behaviors performance more reasonable, but was less affected by longitudinal bending moment. This conclusion of the small-radius bridge is significant to the designing work in the future.

Effects of dowels on the mechanical properties of wooden composite beams in ancient timber structures

BioResources ◽  
2021 ◽  
Vol 16 (4) ◽  
pp. 6891-6909
Author(s):  
Xiaoli Han ◽  
Jian Dai ◽  
Wei Qian ◽  
Zhaoyang Zhu ◽  
Baolong Li
Keyword(s):  
Mechanical Properties ◽  
Composite Beam ◽  
Bending Moment ◽  
Composite Beams ◽  
Timber Structures ◽  
Test Results ◽  
Mechanical Behaviors ◽  
Bending Capacity ◽  
Loading Tests ◽  
Failure Conditions

In order to provide more accurate suggestions for the restoration of ancient timber buildings, five types of specimens were designed for static loading tests. The tree species used for the specimens was larch. The wooden composite beams were composed of purlins, tie plates, and fangs. The study analyzed the effects of the number and position of dowels on the mechanical behaviors of wooden composite beams in ancient timber buildings. The bending moment, slippage, strain of the wooden composite beams under the deflection of the beam allowed according to code, and the ultimate bearing capacity of the wooden column composite beams under failure conditions were examined. The test results showed that the dowels could improve the bending capacity of the wooden composite beams. The even distribution of the dowels was beneficial in reducing the sliding effect of the wooden composite beams. Under the amount of deflection allowed by the code, the mid-span section strain along the height of the wooden composite beam approximately conformed to the plane section assumption. The wooden composite beam still had bending capacity after each member failed. The results of this study illustrated that dowels improved the overall mechanical properties of the wooden composite beams.

Sealing Performance Test of Slip-On Type Pipe Flange Connections Subject to Internal Pressure and Bending Moment

2010 ◽  
Author(s):  
Satoshi Nagata ◽  
Takashi Kobayashi ◽  
Hirokazu Tsuji ◽  
Toshiyuki Sawa
Keyword(s):  
Internal Pressure ◽  
Performance Test ◽  
Bending Moment ◽  
Measured Data ◽  
Strain Gages ◽  
Mechanical Behaviors ◽  
Pressure Decay ◽  
Sealing Performance ◽  
Gas Leak ◽  
Helium Gas

This paper presents the results of sealing performance test on the slip-on type pipe flange connections for 8 inch and 16 inch. The flange connections are subjected to internal pressure and bending moment. Internal pressure is applied by Helium gas and the bending moment is loaded through 4 points bending equipment. Gas leak rates are measured by pressure decay method. During the test, the variations in the axial bolt force are monitored for all the bolts by strain gages. The pipe stress at the junction of pipe and flange is also measured. Analyzing the measured data, the mechanical behaviors of the slip-on type flange connections under internal pressure and bending moment as well as the sealing performance are clarified.

Influence of Yield Strength Variability over Cross-Section to Steel Beam Load-Carrying Capacity

2005 ◽  
Vol 10 (2) ◽  
pp. 151-160 ◽  
Author(s):  
J. Kala ◽  
Z. Kala
Keyword(s):  
Yield Strength ◽  
Cross Section ◽  
Carrying Capacity ◽  
Bending Moment ◽  
Statistical Characteristics ◽  
Load Carrying Capacity ◽  
Load Carrying ◽  
Strength Variability ◽  
Hot Rolled ◽  
Hot Rolled Steel

Authors of article analysed influence of variability of yield strength over cross-section of hot rolled steel member to its load-carrying capacity. In calculation models, the yield strength is usually taken as constant. But yield strength of a steel hot-rolled beam is generally a random quantity. Not only the whole beam but also its parts have slightly different material characteristics. According to the results of more accurate measurements, the statistical characteristics of the material taken from various cross-section points (e.g. from a web and a flange) are, however, more or less different. This variation is described by one dimensional random field. The load-carrying capacity of the beam IPE300 under bending moment at its ends with the lateral buckling influence included is analysed, nondimensional slenderness according to EC3 is λ¯ = 0.6. For this relatively low slender beam the influence of the yield strength on the load-carrying capacity is large. Also the influence of all the other imperfections as accurately as possible, the load-carrying capacity was determined by geometrically and materially nonlinear solution of very accurate FEM model by the ANSYS programme.

Buckling Behavior of Tire Breaker Structure

1983 ◽  
Vol 11 (1) ◽  
pp. 3-19
Author(s):  
T. Akasaka ◽  
S. Yamazaki ◽  
K. Asano
Keyword(s):  
Elastic Foundation ◽  
Elastic Moduli ◽  
Wave Length ◽  
Bending Moment ◽  
Experimental Results ◽  
Automobile Tire ◽  
Buckling Behavior ◽  
Post Buckling ◽  
Steel Cord ◽  
Interlaminar Shear

Abstract The buckled wave length and the critical in-plane bending moment of laminated long composite strips of cord-reinforced rubber sheets on an elastic foundation is analyzed by Galerkin's method, with consideration of interlaminar shear deformation. An approximate formula for the wave length is given in terms of cord angle, elastic moduli of the constituent rubber and steel cord, and several structural dimensions. The calculated wave length for a 165SR13 automobile tire with steel breakers (belts) was very close to experimental results. An additional study was then conducted on the post-buckling behavior of a laminated biased composite beam on an elastic foundation. This beam is subjected to axial compression. The calculated relationship between the buckled wave rise and the compressive membrane force also agreed well with experimental results.

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