Stress Analysis in the Combination of Footplate and Caisson Foundation

2016 ◽  
Vol 845 ◽  
pp. 89-93
Author(s):  
Niken Silmi Surjandari ◽  
Yusep Muslih Purwana ◽  
Rensia Erlyana Majid
Keyword(s):  
Bearing Capacity ◽  
Stress Analysis ◽  
Plane Strain ◽  
Contact Pressure ◽  
Applied Load ◽  
Low Cost ◽  
Strain Condition ◽  
Conservative Approach ◽  
Depth Variation ◽  
Properties Of Soil

Currently, the combined footplate-caisson foundation has been used for some projects. This type of foundation is one of the chosen low cost foundations for the structure supporting medium load when the bearing capacity of conventional foundation is not sufficient. The inserted caisson underneath the footing enables to increase its performance; has a better bearing capacity and lower settlement. Unfortunately, the theoretical basic regarding this foundation is not available so that the design tends to use a conservative approach. For this reason, the study on footplate-caisson foundation is essential to obtain the information of its performances. In this study, the combined footplate-caisson was numerically modelled in plane-strain condition as a foundation resting on clay. The footplate was modelled in the depth variation of 0.75 m up to 1.5 m in fixed width of 1.5 m x 1.5 m; whereas the caisson was modelled in depth variation of 0.75 up to 4.5 m in fixed diameter of 1.0 m. The properties of soil and foundation are presented in the paper. The applied load on the model was varied from 60 kPa up to 1000 kPa. The result of the study indicates that the presence of caisson contributes to the decrease in contact pressure in footplate. The percentage of the contribution depends on the dimension of each element and the depth of caisson.

scholarly journals Contribution to the Study of Solid-Solid Thermal Contact Resistances--A Comparative Study

2021 ◽  
Vol 45 (4) ◽  
pp. 267-272
Author(s):  
Rahmouna Cheriet ◽  
Bourassia Bensaad ◽  
Fatiha Bouhadjela ◽  
Soufyane Belhenini ◽  
Mohammed Belharizi
Keyword(s):  
Contact Resistance ◽  
Contact Pressure ◽  
Mixed Method ◽  
Thermal Contact Resistance ◽  
Low Cost ◽  
Thermal Contact ◽  
Three Dimensional ◽  
Empirical Models ◽  
Three Dimensional Finite Element ◽  
Semi Empirical

This study presents a mixed numerical / semi-empirical approach that primarily aimed to estimate the thermal contact resistance between two solids. The results obtained by this mixed method were compared and validated by experimental measurements of this resistance. Three semi-empirical models were used, namely the Mikic model, the Yovanovich model and the Antonetti model. The three-dimensional finite element numerical simulation was used to estimate the contact pressure between the two solids. Then this contact pressure obtained numerically was compared to the hardness of the solids in contact. The findings indicated that the numerically obtained contact pressures were close to hardness. Therefore, the hardness, which is usually used as an input variable in semi-empirical models, was replaced by the contact pressure. The thermal contact resistance obtained by this mixed method was then compared with the experimental one. The outcomes obtained from this comparison turned out to be very conclusive and can therefore be used to reinforce our approach which can actually be viewed as a reliable and low-cost method for estimating the thermal contact resistance between solids in contact.

Texture, Microstructure and Strain Sensibility in Compressed Magnesium Alloys

2005 ◽  
Vol 488-489 ◽  
pp. 185-188 ◽  
Author(s):  
Ping Yang ◽  
Zude Zhao ◽  
Li Meng ◽  
Xueping Ren ◽  
Shao Dong Huang
Keyword(s):  
Plane Strain ◽  
Magnesium Alloys ◽  
Deformation Process ◽  
Az31 Alloy ◽  
Deformation Mechanisms ◽  
Strain Condition ◽  
Zk60 Alloy ◽  
Initial Texture ◽  
Kinetics Of ◽  
External Strain

Depending on its initial texture and external strain condition differences in deformation mechanisms, kinetics of dynamic recrystallization or even superplastic behaviors may emerge in magnesium alloys leading to distinct microstructure and texture evolutions. When imposed strain condition is altered, e.g. from plane strain compression to rolling or uniaxial compression, the deformation anisotropy will decrease in different rates and basal slip and {1012} twinning will dominate deformation process. This work examines this strain sensibility by inspecting the σ-ε curves, microstructures and textures in a quasi plane-strain compressed ZK60 alloy and compares the results with those of AZ31 alloy compressed in channel die.

Load cells calibration with a low cost data acquisition system

2019 ◽  
Vol 6 (1) ◽  
Author(s):  
Pedro Leineker Ochoski Machado ◽  
Luis Vitorio Gulineli Fachini ◽  
Vitor Otávio Ochoski Machado ◽  
Romeu Miqueias Szmoski ◽  
Thiago Antonini Alves
Keyword(s):  
Data Acquisition ◽  
Calibration Curve ◽  
Applied Load ◽  
Low Cost ◽  
Data Acquisition System ◽  
Acquisition System ◽  
Voltage Variation ◽  
Load Cells ◽  
In Series ◽  
Measurement Uncertainties

In the present work, an experimental analysis was performed to obtain the calibration curve of three load cells connected in series. The control of the load applied on a given component is an important factor in some engineering applications, for example, in cases where it is desired to increase the heat exchange between two surfaces. One of the ways to control the applied load is the use of load cells, which has as its principle of use a strain gauge that has its resistance varied when it undergoes a deformation, thus causing a voltage variation due to the application of load. This study used an ArduinoTM microcontroller as a data acquisition system and blocks with known mass for load application.  In this way it was possible to obtain the calibration curve of the load cells by means of linear regression between the mass of the blocks and the data obtained by the ArduinoTM microcontroller and verify their applicability according to their measurement uncertainties.

scholarly journals Quantitative thermoelastic stress analysis by means of low-cost setups

2020 ◽  
Vol 134 ◽  
pp. 106158
Author(s):  
Giuseppe Pitarresi ◽  
Riccardo Cappello ◽  
Giuseppe Catalanotti
Keyword(s):  
Stress Analysis ◽  
Low Cost ◽  
Thermoelastic Stress ◽  
Thermoelastic Stress Analysis
Sign in / Sign up

Export Citation Format

Share Document