Creep Behavior of Recycled-Content Expanded Polystyrene Geofoam Under Compressive Loading

2018 ◽  
pp. 151-160
Author(s):  
Chuanqi Wang ◽  
David Arellano ◽  
Roger Meier
Keyword(s):  
Creep Behavior ◽  
Compressive Loading ◽  
Expanded Polystyrene ◽  
Recycled Content

A machine learning approach to estimate the strain energy absorption in expanded polystyrene foams

2021 ◽  
pp. 0021955X2110210
Author(s):  
Alejandro E Rodríguez-Sánchez ◽  
Héctor Plascencia-Mora
Keyword(s):  
Neural Network ◽  
Energy Absorption ◽  
Mechanical Energy ◽  
Compressive Loading ◽  
Ground Truth ◽  
Expanded Polystyrene ◽  
Polystyrene Foam ◽  
Stress Strain ◽  
Ground Truth Data ◽  
Expanded Polystyrene Foam

Traditional modeling of mechanical energy absorption due to compressive loadings in expanded polystyrene foams involves mathematical descriptions that are derived from stress/strain continuum mechanics models. Nevertheless, most of those models are either constrained using the strain as the only variable to work at large deformation regimes and usually neglect important parameters for energy absorption properties such as the material density or the rate of the applying load. This work presents a neural-network-based approach that produces models that are capable to map the compressive stress response and energy absorption parameters of an expanded polystyrene foam by considering its deformation, compressive loading rates, and different densities. The models are trained with ground-truth data obtained in compressive tests. Two methods to select neural network architectures are also presented, one of which is based on a Design of Experiments strategy. The results show that it is possible to obtain a single artificial neural networks model that can abstract stress and energy absorption solution spaces for the conditions studied in the material. Additionally, such a model is compared with a phenomenological model, and the results show than the neural network model outperforms it in terms of prediction capabilities, since errors around 2% of experimental data were obtained. In this sense, it is demonstrated that by following the presented approach is possible to obtain a model capable to reproduce compressive polystyrene foam stress/strain data, and consequently, to simulate its energy absorption parameters.

scholarly journals Analytical description of the creep of expanded polystyrene (EPS) under long-term compressive loading

2011 ◽  
Vol 30 (5) ◽  
pp. 493-500 ◽  
Author(s):  
I.Y. Gnip ◽  
S. Vaitkus ◽  
V. Keršulis ◽  
S. Vėjelis
Keyword(s):  
Compressive Loading ◽  
Analytical Description ◽  
Expanded Polystyrene

Modelling of the Creep Behavior of FRP-Confined Short Concrete Columns Under Compressive Loading

2006 ◽  
Vol 39 (1) ◽  
pp. 53-62 ◽  
Author(s):  
J-F. Berthet ◽  
E. Ferrier ◽  
P. Hamelin ◽  
G. Al Chami ◽  
M. Thériault ◽  
...  
Keyword(s):  
Creep Behavior ◽  
Compressive Loading ◽  
Concrete Columns

Analitical Description of the Creep of Expanded Polystyrene under Compressive Loading

2005 ◽  
Vol 41 (4) ◽  
pp. 357-364 ◽  
Author(s):  
I. J. Gnip ◽  
V. I. Kersulis ◽  
S. I. Vaitkus
Keyword(s):  
Compressive Loading ◽  
Expanded Polystyrene

Experimental Study of the Short-Term Creep Behavior of CFRP Strengthened Mortar under Compressive Loading

2011 ◽  
Vol 61 ◽  
pp. 65-69 ◽  
Author(s):  
Fouzia Khadraoui ◽  
Moussa Karama
Keyword(s):  
Creep Behavior ◽  
Compressive Loading ◽  
Cementitious Materials ◽  
Experimental Program ◽  
Sustained Load ◽  
Chemical Parameters ◽  
Short Term ◽  
Term Creep ◽  
Physical And Chemical ◽  
Short Term Creep

Creep in cementitious materials is an important part of the delayed strains. It is a complex phenomenon in which many physical and chemical parameters are involved. In this paper, an experimental program was conducted to clarify the creep performance of CFRP strengthened mortar. The main parameters under study are the age at the time of loading and the drying. Specimens are tested at a sustained load of 30% of the ultimate strength. These investigations show the interest of the reinforcement by CFRP of the prismatic mortar specimens, this one allows a notable improvement of the creep behavior.

Sign in / Sign up

Export Citation Format

Share Document