Rate-related fatigue injury of vertebral disc under axial cyclic loading in a porcine body-disc-body unit

In this study, detailed finite element analysis was conducted to examine the seismic performance of square and circular hollow steel braces under axial cyclic loading. Finite element models of braces were constructed using ABAQUS finite element analysis (FEA) software and validated with experimental results from previous papers to expand the specimen’s matrix. The influences of cross-section shape, slenderness ratio, and width/diameter-to-thickness ratio on hysteretic behavior and compressive-tensile strength degradation were studied. Simulation results of parametric studies show that both square and circular hollow braces have a better cyclic performance with smaller slenderness and width/diameter-to-thickness ratios, and their compressive-tensile resistances ratio significantly decreases from cycle to cycle after the occurrence of the global buckling of braces.

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Fatigue Failure Model for Composite Laminates under Multi-Axial Cyclic Loading

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.183-187.945 ◽

2000 ◽

Vol 183-187 ◽

pp. 945-950 ◽

Cited By ~ 2

Author(s):

Chong Soo Lee ◽

W. Hwang ◽

Hyun Chul Park ◽

Kyung Seop Han

Keyword(s):

Cyclic Loading ◽

Fatigue Failure ◽

Composite Laminates ◽

Failure Model ◽

Axial Cyclic Loading

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Assessment of analytical stress and strain at peak and at ultimate conditions for fiber-reinforcement polymer-confined reinforced concrete columns of rectangular sections under axial cyclic loading

Structural Concrete ◽

10.1002/suco.201900386 ◽

2020 ◽

Cited By ~ 3

Author(s):

Theodora Fanaradelli ◽

Theodoros Rousakis

Keyword(s):

Reinforced Concrete ◽

Cyclic Loading ◽

Fiber Reinforcement ◽

Concrete Columns ◽

Stress And Strain ◽

Reinforced Concrete Columns ◽

Axial Cyclic Loading

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Effective stress regime around a jacked steel pile during installation ageing and load testing in chalk

Canadian Geotechnical Journal ◽

10.1139/cgj-2017-0145 ◽

2018 ◽

Vol 55 (11) ◽

pp. 1577-1591 ◽

Cited By ~ 11

Author(s):

R.M. Buckley ◽

R.J. Jardine ◽

S. Kontoe ◽

B.M. Lehane

Keyword(s):

Cyclic Loading ◽

Effective Stress ◽

Test Site ◽

Static Tension ◽

Load Testing ◽

Stress Regime ◽

Effective Stresses ◽

Axial Cyclic Loading ◽

Tension Testing ◽

Static And Cyclic Loading

This paper reports experiments with 102 mm diameter closed-ended instrumented Imperial College piles (ICPs) jacked into low- to medium-density chalk at a well-characterized UK test site. The “ICP” instruments allowed the effective stress regime surrounding the pile shaft to be tracked during pile installation, equalization periods of up to 2.5 months, and load testing under static tension and one-way axial cyclic loading. Installation resistances are shown to be dominated by the pile tip loads. Low installation shaft stresses and radial effective stresses were measured that correlated with local cone penetration test (CPT) tip resistances. Marked shaft total stress reductions and steep stress gradients are demonstrated in the vicinity of the pile tip. The local interface shaft effective stress paths developed during static and cyclic loading displayed trends that resemble those seen in comparable tests in sands. Shaft failure followed the Coulomb law and constrained interface dilation was apparent as the pile experienced drained loading to failure, although with a lesser degree of radial expansion than with sands. Radial effective stresses were also found to fall with time after installation, leading to reductions in shaft capacity as proven by subsequent static tension testing. The jacked, closed-ended, piles’ ageing trends contrast sharply with those found with open piles driven at the same site, indicating that ageing is affected by pile tip geometry and (or) installation method.

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