Multiscale Modelling Framework for Elasticity Homogenization of Ultra High Strength Concrete Using Nano/Microscale Characterization and Finite Element Representative Volume Element Analysis

2021 ◽  
Author(s):  
Petikirige Sadeep Madhushan Thilakarathna ◽  
Kasun Shanaka Kristombu Baduge ◽  
Priyan Mendis ◽  
Hyuk Lee ◽  
Egodawaththa Ralalage Kanishka Chandrathilaka ◽  
...  
Keyword(s):  
Finite Element ◽  
Representative Volume Element ◽  
High Strength Concrete ◽  
High Strength ◽  
Multiscale Modelling ◽  
Volume Element ◽  
Element Analysis ◽  
Strength Concrete ◽  
Representative Volume ◽  
Modelling Framework

Representative Volume Element for Mechanical Properties of Carbon Nanotube Nanocomposites Using Stochastic Finite Element Analysis

2020 ◽  
Vol 142 (3) ◽  
Author(s):  
Seyed Hamid Reza Sanei ◽  
Randall Doles
Keyword(s):  
Mechanical Properties ◽  
Finite Element ◽  
Representative Volume Element ◽  
Volume Element ◽  
Length Scale ◽  
Stochastic Finite Element ◽  
Element Analysis ◽  
Representative Volume ◽  
Element Approach ◽  
Stochastic Finite Element Analysis

Abstract The aim of this study is to present a representative volume element (RVE) for nanocomposites with different microstructural features using a stochastic finite element approach. To that end, computer-simulated microstructures of nanocomposites were generated to include a variety of uncertainty present in geometry, orientation, and distribution of carbon nanotubes. Microstructures were converted into finite element models based on an image-based approach for the determination of elastic properties. For each microstructure type, 50 realizations of synthetic microstructures were generated to capture the variability as well as the average values. Computer-simulated microstructures were generated at different length scales to determine the change in mechanical properties as a function of length scale. A representative volume element is defined at a length scale beyond which no change in variability is observed. The results show that there is no universal RVE applicable to all properties and microstructures; however, the RVE size is highly dependent on microstructural features. Microstructures with agglomeration tend to require larger RVE. Similarly, random microstructures require larger RVE when compared with aligned microstructures.

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