A finite element solution scheme for an elastic–viscoplastic soil model

Kelln, Curtis KellnC.; Sharma, Jitendra; Hughes, David

doi:10.1016/j.compgeo.2007.10.003

Cited by 16 publications

(9 citation statements)

References 8 publications

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“…Staged construction embankment problem(Kelln et al 2007) Saturated soils undergo volume deformations, compressing vertically and expanding laterally as shown inFigure 43.Figure 43 trends similarly to the Kelln et al (2007)'s study. As excess pore water pressure decreases and goes to zero, settlements reach a constant value which shows end of consolidation in Figure 44.…”

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confidence: 64%

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Numerical Analysis of the Response of Soft Foundation Soils under Tall Embankments and Retaining Walls

Bozkurt¹,

Fratta²

2016

Geotechnical and Structural Engineering Congress 2016

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The construction of tall embankments on soft soils requires staged construction, which leads to the consolidation of foundation soils, an increase in their effective stress, reduction in void ratio, and gain in shear strength. However, retaining walls and tall embankments are not fully constrained, which contributes to the generation of lateral movements that magnify vertical settlements of the embankments, potentially leading to global failure of the foundation soil and embankment system. This study systematically presents how material properties and retaining wall geometries influence the safety of the retaining walls-foundation soil system and the relationship between lateral movements to the magnitude of vertical settlement on retaining walls using numerical analyses and analytical methods. PLAXIS, a finite element package, is used for modeling and analyzing deformation of retaining walls and foundations. The methods presented herein are validated using different case studies from cross-sections of a newly constructed STH 29 / USH 41 interchange in the State of Wisconsin in the United States. Parametric studies were conducted that involved combinations of retaining walls and soft soil conditions to assess failure mechanisms and the contribution of lateral deflection to vertical settlement. These results are validated using vertical settlement measurements at the edge of the retaining walls and pore pressure measurements under the foundation soil. I thank Professors Tuncer B. Edil and James M. Tinjum for providing scholarly insight. I would like to thank to Professor Tuncer B. Edil for his guidance about life. Most importantly, I would like to thank my entire family, with special thanks to my parents (Hatice and Yalcin Bozkurt) and my brother (Cagatay Bozkurt) for their love and support. I would like to thank my uncle (Muzaffer Sezer), my grandmother and grandfather (Elif and Hakki Sezer) for believing my success and supporting me throughout my education life. I would like to thank all my friends back in Turkey, specially my best friends Buket Baylan and Yagmur Hazal Sadirvan. I would like to thank Onur Kutlu for his help and support during my graduate studies. I will be always grateful. I would like to thank fellow colleagues Jeff Newgard and Maximiliano G. Villarreal for their assistance on several different occasions. This thesis is dedicated to my family.

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supporting

confidence: 64%

“…Moreover, the deepest transducer, Point C, has the highest excess pore water pressure as expected. Kelln et al (2007)…”

Section: Numerical Model Of Msew On Soft Foundation Soilmentioning

confidence: 99%

Numerical Analysis of the Response of Soft Foundation Soils under Tall Embankments and Retaining Walls

Bozkurt¹,

Fratta²

2016

Geotechnical and Structural Engineering Congress 2016

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“…During the cutting process, the stem generates multiple stress and deformation near the contact area with the cutter, which directly affects the cutting effect. To examine the influence of different factors affecting the cutting process, ANSYS/LS-DYNA was employed to simulate the cutting process of the disc cutter [19][20][21].…”

Section: Iiisimulation Analysis Of Cutting Processmentioning

confidence: 99%

Design and Parameter Optimization of Disc Type Cutting Device for Castor Stem

et al. 2020

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To increase the cutting efficiency for castor stem, the castor harvester cutting device was developed. The structure of the disc cutting device was designed. Cutting blade angle, sufficient working and minor cutting edge lengths were determined, which were 20°, 73 mm and 19.8 mm, respectively. The finite element model of disc cutter for castor stem was established. The incision volume was selected as the cutting performance evaluation index. The cutting process of the cutter was simulated. The results show that the cutting performance of the trapezoidal cutter is preferable to that of the rectangular and the curved cutters. When cutting blade cuts the stem, the volume of the incision decreases first and then increases, and the size of the incision increases with the increase of cutting edge angle. When the blade angle is 10°, the cutter has the ideal cutting quality. Considering the blade angle, the slip angle, and the angle of the cutter head as factors, the virtual test of the cutter was made with the incision volume as the index. The response surface analysis was used to obtain the cutter structure parameters when the incision volume was the least. The result for the blade, slip and cutter head inclination angles are 14.06°, 19.93°, and 10.54°, respectively. The cutting efficiency evaluation index (one-time cutting) was established to optimize the cutter running parameters. The results show that when the cutter moving speed was 1.011 m/s and the cutter rotation speed was 282.0 r/min, the maximum cutting efficiency is 2.25 castor stems/s.

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“…Besides, FEM is good at analyzing complex engineering problems, especially for dynamic systems with large deformation and failure [ 3 , 4 ]. It has been used by many researchers [ 5 – 9 ] to analyze problems related to soil mechanics and the interaction between soil and tillage tools.…”

Section: Introductionmentioning

confidence: 99%

Design and Analysis of Bionic Cutting Blades Using Finite Element Method

Yang

et al. 2015

Applied Bionics and Biomechanics

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Praying mantis is one of the most efficient predators in insect world, which has a pair of powerful tools, two sharp and strong forelegs. Its femur and tibia are both armed with a double row of strong spines along their posterior edges which can firmly grasp the prey, when the femur and tibia fold on each other in capturing. These spines are so sharp that they can easily and quickly cut into the prey. The geometrical characteristic of the praying mantis's foreleg, especially its tibia, has important reference value for the design of agricultural soil-cutting tools. Learning from the profile and arrangement of these spines, cutting blades with tooth profile were designed in this work. Two different sizes of tooth structure and arrangement were utilized in the design on the cutting edge. A conventional smooth-edge blade was used to compare with the bionic serrate-edge blades. To compare the working efficiency of conventional blade and bionic blades, 3D finite element simulation analysis and experimental measurement were operated in present work. Both the simulation and experimental results indicated that the bionic serrate-edge blades showed better performance in cutting efficiency.

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A finite element solution scheme for an elastic–viscoplastic soil model

Cited by 16 publications

References 8 publications

Numerical Analysis of the Response of Soft Foundation Soils under Tall Embankments and Retaining Walls

Numerical Analysis of the Response of Soft Foundation Soils under Tall Embankments and Retaining Walls

Design and Parameter Optimization of Disc Type Cutting Device for Castor Stem

Design and Analysis of Bionic Cutting Blades Using Finite Element Method

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