Experimental Study on the Fatigue Strength of the Bogie Frame for Tilting Railway Vehicles

2006 ◽  
Vol 321-323 ◽  
pp. 590-593 ◽  
Author(s):  
Nam Po Kim ◽  
Jung Seok Kim ◽  
Sung Il Seo ◽  
Tae Won Park
Keyword(s):  
Experimental Study ◽  
Fatigue Strength ◽  
Fatigue Loading ◽  
Load Test ◽  
Static Load Test ◽  
Fatigue Load ◽  
Loading Test ◽  
Bogie Frame ◽  
Goodman Diagram ◽  
Tilting Train

This paper shows the experimental study to evaluate the fatigue strength of a bogie frame for Korean tilting train. The various load cases were established based on the international standard (UIC615-4) and the special tilting load case, which is unique in the tilting train, was derived by dynamic analysis and logical assumption of operation under worst tilting condition. The experimental study was conducted by means of two ways, both static and fatigue loading test. Through the static load test, the safety against fatigue was assessed using Goodman diagram of the material used. The fatigue load test was carried out up to 1x107cycles. The fatigue strength was assessed by fatigue crack inspection by means of NDT test at the stage of 6x106cycles and 1x107cycles.

A Study on the Structural Analysis and Loading Test of the Bogie Frame

2006 ◽  
Vol 326-328 ◽  
pp. 1087-1092 ◽  
Author(s):  
Sung Cheol Yoon ◽  
Won Kyung Kim ◽  
Jeong Guk Kim
Keyword(s):  
Structural Analysis ◽  
Evaluation Method ◽  
Fem Analysis ◽  
Maximum Load ◽  
Load Test ◽  
Test Results ◽  
Static Load Test ◽  
Loading Test ◽  
Bogie Frame ◽  
Design Load

This paper describes the results of structural analysis and loading test of a bogie frame. The purpose of the analysis and test is to evaluate the safety and functionality of the bogie frame under maximum load. The bogie system consist of the bogie frame, suspensions, wheel-sets, a brake system and a transmission system. Of these components, the bogie frame is the major component subjected to the vehicle and passenger loads. The evaluation method used the JIS E 4207 specifications throughout the FEM analysis and static load test. The test results have shown the bogie frame to be safe and stable under design load conditions.

A Study on the Fracture Test in Running System of Railway

2010 ◽  
Vol 452-453 ◽  
pp. 49-52
Author(s):  
Sung Cheol Yoon ◽  
Jeong Guk Kim ◽  
Sung Hyuk Park ◽  
Kwang Sun Baik ◽  
Kang Youn Choe
Keyword(s):  
Evaluation Method ◽  
Fem Analysis ◽  
Maximum Load ◽  
Load Test ◽  
Test Results ◽  
Static Load Test ◽  
Loading Test ◽  
Bogie Frame ◽  
Design Load ◽  
Running System

This paper describes the results of structural analysis and loading test of a bogie frame. The purpose of the analysis and test is to evaluate the safety and functionality of the bogie frame under maximum load. The bogie system consist of the bogie frame, suspensions, wheel-sets, a brake system and a transmission system. Of these components, the bogie frame is the major component subjected to the vehicle and passenger loads. The evaluation method used the JIS E 4207 specifications throughout the FEM analysis and static load test. The test results have shown the bogie frame to be safe and stable under design load conditions.

A Study on the Fatigue Test of Bogie Frame by Stress Measurement

2008 ◽  
Vol 385-387 ◽  
pp. 645-648 ◽  
Author(s):  
Sung Cheol Yoon ◽  
Chang Sung Jeon ◽  
Won Kyung Kim ◽  
Jeong Guk Kim ◽  
Sang Hoon Chang
Keyword(s):  
Evaluation Method ◽  
Stress Measurement ◽  
Fem Analysis ◽  
Maximum Load ◽  
Load Test ◽  
Test Results ◽  
Static Load Test ◽  
Loading Test ◽  
Bogie Frame ◽  
Design Load

This paper describes the results of structural analysis and loading test of a bogie frame. The purpose of the analysis and test is to evaluate the safety and functionality of the bogie frame under maximum load. The bogie system consist of the bogie frame, suspensions, wheel-sets, a brake system and a transmission system. Of these components, the bogie frame is the major component subjected to the vehicle and passenger loads. The evaluation method used the JIS E 4207 specifications throughout the FEM analysis and static load test. The test results have shown the bogie frame to be safe and stable under design load conditions.

scholarly journals Experimental Study on Mechanical Property of Stiffening-ribbed-hollowpipe Reinforced Concrete Girderless Floor with Four Clamped Edges Supported

2013 ◽  
Vol 7 (1) ◽  
pp. 170-178 ◽  
Author(s):  
Weijun Yang ◽  
Yongda Yang ◽  
Jihua Yin ◽  
Yushuang Ni
Keyword(s):  
Mechanical Property ◽  
Finite Element Analysis ◽  
Finite Element ◽  
Reinforced Concrete ◽  
Large Scale ◽  
Load Test ◽  
Static Load Test ◽  
Loading Test ◽  
Element Analysis ◽  
Clamped Edges

In order to study the basic mechanical property of cast-in-place stiffening-ribbed-hollow-pipe reinforced concrete girderless floor, and similarities and differences of the structural performance compared with traditional floor, we carried out the destructive stage loading test on the short-term load test of floor model with four clamped edges supported in large scale, and conducted the long-term static load test. Also, the thesis conducted finite element analysis in virtue of ANSYS software for solid slab floor, stiffening-ribbed-hollow-pipe floor and tubular floor. The experiment indicates that the developing process of cracks, distribution and failure mode in stiffening-ribbed-hollow-pipe floor are similar to that of solid girderless floor, and that this kind of floor has higher bearing capacity and better plastic deformation capacity. The finite element analysis manifests that, compared with solid slab floor, the deadweight of stiffening-ribbed-hollow-pipe floor decreases on greater level while deformation increases little, and that compared with tubular floor, this floor has higher rigidity. So stiffening-ribbed-hollow-pipe reinforced concrete girderless floor is particularly suitable for long-span and large-bay building structure.

Experimental Study on Strain Performance of Tensile Reinforcement under Fatigue Loads

2013 ◽  
Vol 351-352 ◽  
pp. 1625-1628
Author(s):  
Xian Xi Tang ◽  
Jin Bao Liang ◽  
Yan Peng Zhu ◽  
Xian Zhou Tang ◽  
Yue Xu
Keyword(s):  
Experimental Study ◽  
Static Load ◽  
Concrete Slab ◽  
Strain Curve ◽  
Load Test ◽  
Static Load Test ◽  
Reinforced Concrete Slab ◽  
Linear Change ◽  
After Effect ◽  
Fatigue Loads

As for the study on the strain performance of tensile reinforcement under the fatigue loads with amplitude of certain values, two groups of reinforced concrete slab bridge specimen were made. The fatigue test was carried out on one group of specimen, and the corresponding static load test was carried out on another group of specimen, the experimental study on the strain performance of tensile reinforcement was carried on bottom of the mid span of slabs. The results of the study shown that, under the fatigue loads at a certain amplitude, the strain performance of the tensile reinforcement tend to be stable with the increase of number of fatigue cycle, the strain value showed certain linear relationship with static load applied. When the fatigue amplitude increased, the change rule of strain with static load value applied was approximately linear, but the strain value increased more than the fatigue amplitude less under the same static load. It could be seen through the comparison of load - strain curve of the static load specimen, after effect of compressive fatigue with certain amplitude, the strain change with load applied was close to linear change, which has great relationship with the effect on concrete and reinforcement plastic deformation by fatigue load. The test results had the vital significance of further research on reinforcement performance under the action of fatigue loads.

scholarly journals Rescue Augmentation: Increased Stability in Augmentation After Initial Loosening of Pedicle Screws

2020 ◽  
pp. 219256822091912
Author(s):  
Lukas Weiser ◽  
Gerd Huber ◽  
Kay Sellenschloh ◽  
Klaus Püschel ◽  
Michael M. Morlock ◽  
...  
Keyword(s):  
Fatigue Strength ◽  
Bone Density ◽  
Fatigue Testing ◽  
Quantitative Computed Tomography ◽  
Pedicle Screws ◽  
Fatigue Loading ◽  
Cement Augmentation ◽  
Fatigue Load ◽  
The Impact

Study Design: Biomechanical study. Objectives: Failure of pedicle screws is a major problem in spinal surgery not only postoperatively, but also intraoperatively. The aim of this study was to evaluate whether cement augmentation may restore mounting of initially loosened pedicle screws. Methods: A total of 14 osteoporotic or osteopenic human cadaveric vertebral bodies (L2)—according to quantitative computed tomography (QCT)—were instrumented on both sides by conventional pedicle screws and cement augmented on 1 side. In vitro fatigue loading (cranial-caudal sinusoidal, 0.5 Hz) with increasing peak force (100 N + 0.1 N/cycles) was applied until a screw head displacement of 5.4 mm (∼20°) was reached. After loosening, the nonaugmented screw was rescue augmented, and fatigue testing was repeated. Results: The fatigue load reached 207.3 N for the nonaugmented screws and was significantly ( P = .009) exceeded because of initial cement augmentation (300.6 N). The rescue augmentation after screw loosening showed a fatigue load of 370.1 N which was significantly higher ( P < .001) compared with the nonaugmented screws. The impact of bone density on fatigue strength decreased from the nonaugmented to the augmented to the rescue-augmented screws and shows the greatest effect of cement augmentation on fatigue strength at low bone density. Conclusions: Rescue augmentation leads to similar or higher fatigue strengths compared with those of the initially augmented screws. Therefore, the cement augmentation of initially loosened pedicle screws is a promising option to restore adequate screw stability.

Numerical Analysis and Static Loading Test of Equipment Fixed on the Light-Weight Partition Wall

2015 ◽  
Vol 752-753 ◽  
pp. 773-777
Author(s):  
Meng Chieh Lee ◽  
Ren Zuo Wang ◽  
Bing Chang Lin ◽  
Chao Hsum Huang
Keyword(s):  
Static Loading ◽  
Element Model ◽  
Load Test ◽  
Light Weight ◽  
Static Load Test ◽  
Loading Test ◽  
Partition Wall ◽  
Nonlinear Responses ◽  
Static Loading Test ◽  
External Forces

The purpose of this paper is to study the nonlinear responses of equipment fixed on the light-weight partition wall (LWPW). The center-point flexure test (CPFT) and static load test of the light-weight partition wall (LWPW) are developed. The elastic modulus and support loading of three boards can be obtained from FPFT and static loading test. The LWPW finite element model using ANSYS is used to simulate the deformations of the board subjected to external forces. Numerical simulation results are very close to the experiment results. It demonstrates the accuracy of the ANSYS model.

Static Loading Test of the End-Bearing Pile under the Sides Friction Action

2013 ◽  
Vol 353-356 ◽  
pp. 974-978
Author(s):  
Xiao Wei Wang ◽  
Nan Gai Yi ◽  
Shi Ping Zhang
Keyword(s):  
Finite Element ◽  
Load Test ◽  
Practical Significance ◽  
Engineering Practice ◽  
Single Pile ◽  
Static Load Test ◽  
Loading Test ◽  
Foundation Soil ◽  
Measuring Point ◽  
End Bearing Pile

Because the pile foundation has the characters of high bearing capacity, small deformation and easy to construct, it is widely used in practical engineering. In order to verify the end-bearing pile loading capability, in this paper, the single pile vertical compressive static load test is used to the on-site measuring point in actual engineering test, and get the Q-S curve of the pile. FEM is used to simulate the test at the same time. The ideal elastic-plastic constitutive model based on Mohr-Coulomb failure criteria is used to simulate foundation soil. Some conclusions are obtained by using large scaled finite element analysis software ADINA to build the 2D plane strain finite element model and to proceed numerical analysis of the pile. Finally, the comparative analysis with the engineering practice is proceeded. It has the practical significance for the structure analysis of the single pile.

AN EXPERIMENTAL STUDY AND FINITE ELEMENT ANALYSIS OF CIRCULAR DISK SHAPE OF SMC

2010 ◽  
Vol 24 (15n16) ◽  
pp. 2573-2578
Author(s):  
CHANG-MIN SUH ◽  
SEONG-YOUN KIM ◽  
KYUNG-RYUL KIM
Keyword(s):  
Finite Element Analysis ◽  
Experimental Study ◽  
Finite Element ◽  
Maximum Stress ◽  
Circular Disk ◽  
Load Test ◽  
Static Load Test ◽  
Creep Tests ◽  
Element Analysis ◽  
Molded Parts

An experimental study on material characterization of SMC (Sheet Molding Compounds) compression molded parts was carried out by 3-point bending tests and creep tests. And computer simulation of optimum condition of SMC design was carried out by finite element analysis. The thicknesses of SMC specimen were 6.5, 7, 7.5 and 8mm and the angles of inclination were 0°, 2.5°, 5°, 7.5° and 10°. After static load test, the stress of SMC was different at the each condition. The influence of angles of inclination was important. The maximum stress occurred at 0°. But the more angle of inclination was big, the more maximum stress was small. The decrement was big at the range of 0° to 2.5°. The influence of thicknesses also was important. The more thickness was large, the more maximum stress was small.

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