scholarly journals Mixed Experimental and Numerical Approach to Evaluation of Material Parameters of Clayey Soils

2004 ◽  
Vol 4 (3) ◽  
pp. 199-206 ◽  
Author(s):  
Tomáš Janda ◽  
Pavel Kuklik ◽  
Michal Šejnoha
2016 ◽  
Vol 258 ◽  
pp. 290-293
Author(s):  
Daniel Camas ◽  
Pedro Loureiro ◽  
Pedro Prates ◽  
Fernando Antunes

The experimental procedure to obtain valid and comparable values of ΔKth is laborious and time consuming. The objective of this work is to determine ΔKth using a numerical approach. The CTOD is plotted versus load, and the fatigue threshold corresponds to the onset of plastic deformation. A parametric study was developed in order to understand the effect of material parameters on ΔKth.


2018 ◽  
Vol 38 (10) ◽  
pp. 1007-1016 ◽  
Author(s):  
Hafiz Muhammad Atif ◽  
Nasir Ali ◽  
Muhammad Asif Javed ◽  
Muhammad Sajid

Abstract We investigate the effects of non-Newtonian parameters on the exiting sheet thickness in the calendering of Oldroyd 4-constant fluid. The governing equations are first converted into dimensionless form and then simplified under lubrication approximation theory. A complete numerical approach is developed based on Matlab built-in routine “bvp4c” in order to obtain stream function and pressure gradient. The pressure is computed using Runge-Kutta method. The effects of involved material parameters on various quantities of interest are highlighted through graphs. The results indicate that Oldroyd 4-constant model predicts lower pressure in the nip region than that of the Newtonian model. The force and power for Oldroyd 4-constant model are also lower than their counterparts for Newtonian model. Moreover, the leave-off distance is nearly independent of the material parameters of the Oldroyd 4-constant model for larger value of the entering sheet thickness.


Author(s):  
FORREST BABER ◽  
BRIAN JUSTUSSON ◽  
VIPUL RANATUNGA ◽  
JOSEPH SCHAEFER ◽  
IBRAHIM GUVEN

2021 ◽  
Vol 349 ◽  
pp. 04012
Author(s):  
Rafal Stanik ◽  
Sirko Geller ◽  
Michael Müller ◽  
Tomasz Stanik ◽  
Andreas Gruhl ◽  
...  

The efficient production of component families of small batch sizes and high diversity requires numerical analyses of manufacturing processes, especially for complex shaped components made of fibre-reinforced thermosets. In the case of snap-cure systems, curing takes place in a very short time and the exothermic reaction can lead to accumulation of heat and inhomogeneous curing. In order to achieve a reliable production of composite components, a numerical analysis of the curing process is necessary. Especially the practice-oriented and timesaving determination of the thermal conditions during the curing process is essential for the industrial application. Therefore, an experimental-numerical approach to predict the curing process was presented, which includes the analytical as well as the experimental determination of numerous thermal and thermochemical material parameters and models for snap-cure thermosets. The experimentally determined material parameters and models for the description of the material and structural behaviour are validated and evaluated by numerical simulations. In addition, the developed finite element models were used for the manufacturing process design of a complex component demonstrator.


2018 ◽  
Author(s):  
Vedant Bhuyar ◽  
Shiv Ram Suthar ◽  
Mohit Vijay ◽  
Prodyut R. Chakraborty

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