The effect of strain rate on the mechanical property of PDMS and PDMS/graphene: A molecular dynamics study

Molecular dynamics simulation was used to study the mechanical behavior of polydimethylsiloxane (PDMS) and PDMS/graphene at different strain rates. Firstly, the mechanical behavior of PDMS under uniaxial tension at different strain rates (109/s-1010/s) was studied. Secondly, graphene with a mass ratio of 3.62 was added to PDMS to study the mechanical behavior of the mixed system under uniaxial tension at different strain rates (108/s-1010/s). The results showed that the Young's modulus and tensile strength of PDMS were greatly affected by strain rate. After adding graphene into PDMS, the mechanical properties of the blends at different strain rates were almost the same. This work may provide a deeper understanding on mechanical property of PDMS composites.