scholarly journals Evaluation of Stability of Embankment Constructed on Soft Consolidating Soil with Lime–CFG Composite Column System

2021 ◽  
Vol 7 (3) ◽  
Author(s):  
K. G. Prakash ◽  
A. Krishnamoorthy
Keyword(s):  
Finite Element ◽  
Safety Factor ◽  
Time Interval ◽  
Critical Surface ◽  
Element Analysis ◽  
Consolidation Process ◽  
Foundation Soil ◽  
Composite Column ◽  
Column System ◽  
Consolidating Soil

AbstractEffectiveness of providing lime and CFG composite column system on the safety factor of embankment constructed on consolidating soil is studied at different time intervals during consolidation of foundation soil. The effectiveness of providing composite column system is compared with the effectiveness of providing only lime or CFG columns. In addition, the effectiveness of composite column system on settlement of foundation soil and consolidation process is also investigated. Embankment, foundation soil and columns are modeled using finite element method. Numbers of trial surfaces with different center and radius are generated at each time interval and the critical surface is selected to calculate the safety factor using the effective stresses obtained by finite element analysis. From the study, it is concluded that provision of lime or CFG columns, either individually or in combination, reduces the settlement and improves the safety factor. However, the most effective type of columns and their arrangement to reduce the settlement may not be the most effective to enhance the safety factor and hence, the type of columns and their arrangements has considerable influence on the purpose for which columns are provided.

Finite Element Analysis of Motor Box for EBZ160 Horizontal Roadheader

2015 ◽  
Vol 1090 ◽  
pp. 233-237
Author(s):  
Ji Jun Miao ◽  
Ri Sheng Long
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Optimal Design ◽  
Safety Factor ◽  
Stress And Strain ◽  
Element Analysis

In order to solve the cracking and poor reliability problems of motor box of Horizontal Roadheader, the static structural FEA (Finite Element Analysis) of cutting arm & motor box of the EBH160 Horizontal Roadheader was conducted, and the stress and strain contours of FEA were obtained. By comparing the calculated results, the safety factor of cutting arm & motor box was 1.36, which provides a reference for the optimal design of cutting arm & motor box.

3D Coupled Thermomechanical Finite Element Analysis of Ultrasonic Consolidation

2007 ◽  
Vol 539-543 ◽  
pp. 2651-2656 ◽  
Author(s):  
C.J. Huang ◽  
E. Ghassemieh
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Friction Coefficient ◽  
Stress Field ◽  
Ultrasonic Wave ◽  
Ultrasonic Vibration ◽  
Softening Effect ◽  
Element Analysis ◽  
Consolidation Process ◽  
Ultrasonic Consolidation

A 3-D coupled temperature-displacement finite element analysis is performed to study an ultrasonic consolidation process. Results show that ultrasonic wave is effective in causing deformation in aluminum foils. Ultrasonic vibration leads to an oscillating stress field. The oscillation of stress in substrate lags behind the ultrasonic vibration by about 0.1 cycle of ultrasonic wave. The upper foil, which is in contact with the substrate, has the most severe deformation. The substrate undergoes little deformation. Apparent material softening by ultrasonic wave, which is of great concern for decades, is successfully simulated. The higher the friction coefficient, the more obvious the apparent material softening effect.

scholarly journals Analisis Perancangan Frame Gokart dari Pengaruh Pembebanan dengan Menggunakan CAD Solidworks 2016

Jurnal METTEK ◽  
2021 ◽  
Vol 7 (1) ◽  
pp. 1
Author(s):  
Angga Restu Pahlawan ◽  
Rizal Hanifi ◽  
Aa Santosa
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Safety Factor ◽  
Frame Structure ◽  
Maximum Displacement ◽  
Element Analysis ◽  
Aisi 1045 ◽  
Steel Aisi ◽  
Simulation Results ◽  
Manual Calculation

Frame adalah salah satu komponen yang sangat penting dalam sebuah kendaraan, yang berfungsi sebagai penopang penumpang, mesin, suspensi, sistem kelistrikan dan lain-lain. Melihat fungsi dari frame sangat penting, maka dalam merancang sebuah frame harus diperhitungkan dengan baik. Banyak sekali jenis pengujian yang sering dipakai dalam perancangan sebuah struktur frame, salah satunya adalah digunakannya metode komputasi dengan menggunakan metode Finite Element Analysis (FEA). Tujuan dari penelitian ini adalah untuk mengetahui distribusi tegangan, regangan, displacement, dan safety factor dari hasil pembebanan statis pada frame gokar. Struktur frame didesain dan dianalisis menggunakan software Solidworks 2016. Material yang digunakan frame adalah baja AISI 1045 hollow tube 273,2 mm, dengan menggunakan pembebanan pengendara sebesar 50 kg dan 70 kg. Hasil dari perhitungan manual didapatkan tegangan maksimum sebesar 4,735  107 N/m2, sedangkan dari simulasi didapatkan sebesar 4,516  107 N/m2. Regangan maksimum didapatkan dari perhitungan manual sebesar 2,310  10-4. Displacement maksimum didapatkan dari perhitungan manual sebesar 1,864  108 mm, sedangkan dari simulasi didapatkan sebesar 1,624  108 mm. Safety factor minimum didapatkan dari perhitungan manual sebesar 11,193, dan perhitungan simulasi didapatkan sebesar 11,736. The frame is one of the most important components in a vehicle, which functions as a support for passengers, engines, suspensions, electrical systems and others. Seeing the function of the frame is very important, so designing a frame must be taken into account well. There are many types of tests that are often used in the design of a frame structure, one of which is the use of computational methods using the Finite Element Analysis (FEA) method. The purpose of this study was to determine the distribution of stress, strain, displacement, and safety factor from the results of static loading on the kart frame. The frame structure was designed and analyzed using Solidworks 2016 software. The material used in the frame is steel AISI 1045 hollow tube 27  3,2 mm, using a rider load of 50 kg and 70 kg. The result of manual calculation shows that the maximum stress is 4,735  107 N/m2, while the simulation results are 4,516  107 N/m2. The maximum strain is obtained from manual calculation of 2,310  10-4. The maximum displacement is obtained from manual calculations of 1,864  108 mm, while the simulation results are 1,624  108 mm. The minimum safety factor obtained from manual calculation is 11,193, and the simulation calculation is 11,736.

Finite element modeling of hexagonal wire reinforced embankment on soft clay

2000 ◽  
Vol 37 (6) ◽  
pp. 1209-1226 ◽  
Author(s):  
D T Bergado ◽  
C Teerawattanasuk ◽  
S Youwai ◽  
P Voottipruex
Keyword(s):  
Finite Element ◽  
Full Scale ◽  
Soil Reinforcement ◽  
Wire Mesh ◽  
Direct Shear ◽  
Full Scale Test ◽  
Element Analysis ◽  
Consolidation Process ◽  
Scale Test ◽  
Test Embankment

A full-scale test embankment was constructed on soft Bangkok clay using hexagonal wire mesh as reinforcement. This paper attempts to simulate the behavior of the full-scale test embankment using the finite element program PLAXIS. The agreement between the finite element results and the field data is quite good. The important considerations for simulating the behavior of the reinforced wall embankment were the method of applying the embankment loading during the construction process, the variation of soil permeability during the consolidation process, and the selection of the appropriate model and properties at the interface between the soil and reinforcement. The increased reinforcement stiffness tends to increase the reinforcement tension and increase the embankment forward rotation. The reinforcement tensions increased with the compression of the underlying soft foundation. The appropriate interface properties between the backfill soil and the hexagonal wire mesh reinforcement corresponding to the interaction mechanism at working stress conditions were dominated by the direct shear mechanism. The direct shear interaction coefficient of 0.9 was used.Key words: soil reinforcement, hexagonal wire mesh, finite element analysis, field embankment.

scholarly journals Stability Analysis of Anchored Soil Slope Based on Finite Element Limit Equilibrium Method

2016 ◽  
Vol 2016 ◽  
pp. 1-8
Author(s):  
Rui Zhang ◽  
Jie Zhao ◽  
Guixuan Wang
Keyword(s):  
Finite Element ◽  
Stability Analysis ◽  
Safety Factor ◽  
Slip Surface ◽  
Limit Equilibrium ◽  
Limit Equilibrium Method ◽  
Element Analysis ◽  
Surface Anchoring ◽  
Equilibrium Method ◽  
Slice Method

Under the condition of the plane strain, finite element limit equilibrium method is used to study some key problems of stability analysis for anchored slope. The definition of safe factor in slices method is generalized into FEM. The “true” stress field in the whole structure can be obtained by elastic-plastic finite element analysis. Then, the optimal search for the most dangerous sliding surface with Hooke-Jeeves optimized searching method is introduced. Three cases of stability analysis of natural slope, anchored slope with seepage, and excavation anchored slope are conducted. The differences in safety factor quantity, shape and location of slip surface, anchoring effect among slices method, finite element strength reduction method (SRM), and finite element limit equilibrium method are comparatively analyzed. The results show that the safety factor given by the FEM is greater and the unfavorable slip surface is deeper than that by the slice method. The finite element limit equilibrium method has high calculation accuracy, and to some extent the slice method underestimates the effect of anchor, and the effect of anchor is overrated in the SRM.

Finite Element Analysis on Causes of Crack in Large Underground Garage

2014 ◽  
Vol 580-583 ◽  
pp. 1369-1376
Author(s):  
Bin Shu ◽  
Jian He Peng
Keyword(s):  
Finite Element ◽  
Poisson Ratio ◽  
Expansive Soil ◽  
Element Model ◽  
Underground Water ◽  
Element Analysis ◽  
Foundation Soil ◽  
Finite Element Software ◽  
Crack Problems ◽  
Set Up

The paper aims to solve the serious and regular crack problems in underground garage. ANSYS finite element software is applied to set up the overall finite element model on floor-foundation and foundation coupling beam-foundation soil in underground garage. Combined with engineering field detection, factors influencing underground garage floor like underground water level, soil expansion caused by water content change in expansive soil, soil poisson ratio, foundation settlement are taken into consideration to find out the causes of cracks. The study is expected to provide reference for similar cases in other projects.

Design Optimization of Driveshaft and Universal Joint Using Finite Element Technique

2016 ◽  
Author(s):  
Mosfequr Rahman ◽  
Gustavo Molina ◽  
Sirajus Salekeen ◽  
Ana Dungan ◽  
Isaac Hyers ◽  
...  
Keyword(s):  
Finite Element Analysis ◽  
Finite Element ◽  
Carbon Fiber ◽  
Safety Factor ◽  
Material Properties ◽  
Moment Of Inertia ◽  
Outer Diameter ◽  
Element Analysis ◽  
Numerical Experimentation ◽  
Universal Joints

Finite Element Analysis (FEA) has been performed on variety of a driveshaft and universal joints based on different shaft materials and shaft different operating angles. A driveshaft is particularly useful in applications such as taking of transferring torque from one piece of equipment to the other such as in vehicle of all kinds. A driveshaft transfers torque from the transmission to the rear end differential since these two pieces of equipment cannot be connected directly. The driveshaft has universal joints located on both ends of the shaft to allow for fluctuations in the angle of the transmission and rear differential. The driveshaft alone is composed of two parts, a female and male end, connected by a spline to allow changes in the length during operation. The driveshaft must be able to withstand the constant torque that is being applied throughout operation in order to increase safety for the operator and machine. Having a lower polar moment of inertia allows the driveshaft to turn with a lower torque value compared to a driveshaft with a higher moment of inertia. It is noted that driveshaft can be manufactured into a variety of lengths and diameters depending on the use and equipment it will be supporting. This paper describes a method of finite element implemented on variations of driveshaft and universal joints. Effect of material properties, geometry and operating angle of the driveshaft were considered for this numerical investigation. Five different materials such as structural steel, aluminum alloy, polyethylene, titanium, and carbon fiber with an outer diameter of 1.5 in of the driveshaft was used for this analysis. The effect of both metals and composite materials was observed. Based on the analysis it was found that a 15° operating angle allowed for the longest life cycle of the driveshaft, while the carbon fiber composite presented the highest stress resistance and safety factor, approximately 6 GPa of yield tensile strength and a safety factor of 15. It was also found that titanium had an equivalent safety factor of 15. However, the tensile yield strength of titanium was much lower than that of its composite counterpart. All of the numerical experimentation was done using the Finite Element Analysis software ANSYS. Material properties for all materials were preset in the software except the composite carbon fiber whose properties were easily found from other research papers and experiments. Based on the data collected and the general assumptions that the most effective drive shaft is the one that lasts the longest. It can be concluded that a driveshaft made of carbon fiber operating at an angle of 15° presents the optimum driveshaft design.

scholarly journals Analisis Kekuatan Ball Valve Akibat Tekanan Fluida Menggunakan Finite Element Analysis

2018 ◽  
Vol 4 (2) ◽  
Author(s):  
Meri Rahmi ◽  
Delffika Canra ◽  
Suliono Suliono
Keyword(s):  
Fluid Dynamics ◽  
Finite Element Analysis ◽  
Computational Fluid Dynamics ◽  
Finite Element ◽  
Safety Factor ◽  
Ball Valve ◽  
Element Analysis ◽  
Computational Fluid Dynamics Cfd

Valve (katup) sebagai salah satu produk industri, sangat dibutuhkan oleh perusahaan yang bergerak mengontrol aliran cairan untuk efisiensi. Kebutuhan tentang ini banyak digunakan oleh perusahaan makanan, obat-obatan, minuman, pembangkit listrik dan industri minyak dan gas. Tujuan penggunaan valve adalah untuk membatasi dan mengontrol cairan pada kondisi tekanan tinggi. Salah satu katup yang sering digunakan adalah ball valve, yaitu katup dengan tipe gerak memutar. Adanya permintaan ball valve ini, dibutuhkan produk dengan spesifikasi tertentu memiliki rancangan dengan tingkat kekuatan yang baik. Dengan kata lain, produk valve (katup) yang baik, harus memiliki kekuatan yang baik, aman dan sesuai dengan kebutuhan dilakukan pengujian. Penelitian ini bertujuan untuk melakukan analisis terhadap ball valve 4 inch ANSI 300 untuk memastikan katup yang diproduksi sesuai spesifikasi, kuat dan tahan terhadap tekanan fluida. Metode yang digunakan adalah Finite Element Analysis (FEA) dengan software Solidworks. Analisis dilakukan pada ball valve 4 inch ANSI 300 dengan keadaan full open, hall open dan full closed serta dengan pembebanan 725 psi dan 1087.5 psi hasil dari Computational Fluid Dynamics (CFD). Analisis dilakukan pada temperatur -29.50C, 250C dan 4250C. Berdasarkan hasil analisis dengan FEA, dinyatakan bahwa ball valve 4 inch ANSI 300 kuat dan aman untuk digunakan. Nilai faktor keamanan (safety factor), signifikan lebih tinggi dari nilai safety factor minimum yang diizinkan.

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