Structural solution using molecular dynamics: Fundamentals and a case study of epoxy-silica interface

By Oral Büyüköztürk, Markus J. Buehler. 2011

175 citations recorded by the source corpus.

In this paper, the molecular dynamics (MD) simulation technique is described in the context of structural mechanics applications, providing a fundamental understanding of the atomistic approach, and demonstrating its applicability. Atomistic models provide a bottom-up description of material properties and processes, and MD simulation is capable of solving the dynamic evolution of equilibrium and non-equilibrium processes. The applicability of the technique to structural engineering problems is demonstrated through an interface debonding problem in a multi-layered material system usually encountered in composite structures. Interface debonding may lead to a possible premature failure of fiber reinforced polymer (FRP) bonded reinforced concrete (RC) structural elements subjected to moisture. Existing knowledge on meso-scale fracture mechanics may not fully explain the weakening of the interface between concrete and epoxy, when the interface is under moisture; there is a need to study the moisture affected debonding of the interface using a more fundamental approach that incorporates chemistry in the description of materials. The results of the atomistic modeling presented in this paper show that the adhesive strength (in terms of energy) between epoxy and silica is weakened in the presence of water through its interaction with epoxy. This is correlated with the existing meso-scale experimental data. This example demonstrates that MD simulation can be effectively used in studying the durability of the system through an understanding of how materials interact with the environment at the molecular level. In view of the limitation of MD simulation on both length- and time-scales, future research may focus on the development of a bridging technique between MD and finite element modeling (FEM) to be able to correlate the results from the nano- to the macro-scale.

Subfields: Building and Construction, Civil and Structural Engineering, Pollution

View Paper: https://www.semanticscholar.org/paper/e24575f54cd7887364ee07d8557248bb32cda370

How researchers see this paper

The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.

In Building and Construction

1. Ao Zhou
2. Denvid Lau
3. Lik-ho Tam
4. Zechuan Yu

In Civil and Structural Engineering

1. Ao Zhou
2. Denvid Lau
3. Lik-ho Tam
4. David Hui
5. Zechuan Yu

In Pollution

1. Denvid Lau
2. Ao Zhou
3. Lik-ho Tam
4. David Hui
5. Zechuan Yu

Citations in the corpus

• Nano-engineering of construction materials using molecular dynamics simulations: Prospects and challenges (2018, background): “There is a breakthrough paper published in 2011, which is to introduce the MD simulation to the structural mechanics and engineering field through a fundamental understanding at the atomistic scale and to demonstrate an associated application in structural engineering [62].”
• Effect of moisture on the mechanical properties of CFRP–wood composite: An experimental and atomistic investigation (2015, methodology): “Previous simulations on the epoxy–silica interface [29,30,48] have validated the applicability of CVFF in characterizing the interfacial problems.”