Effects of interface cohesion on mechanical properties of interpenetrating phase nanocomposites

Abstract

Molecular dynamics simulations and micromechanics model analysis are performed to investigate the mechanical behaviours and interfacial effects of interpenetrating phase composites in the nanoscale. It is observed that the overall Young's modulus and ultimate strength of the nanocomposites vary nonlinearly with the cohesive energy of the interface. The cohesive properties affect the stiffness of the interface zone, and in turn, influence the effective Young's modulus of composites. The competition between interfacial failure and weak phase damage results in an optimal cohesive parameter of the interface, at which the composite possesses the maximal ultimate strength. The obtained results provide useful guidelines for the design and optimisation of advanced nanocomposites with superior mechanical properties.

Fatigue responses of metallic glass‐based stochastic network nanomaterial: Superior strain‐hardening ability

“…30,31 Then the network nanomaterials with stochastic bicontinuous structures are established by the phase field decomposition method. 19,32,33 The generated NPMG has identical ligament topological structures to that fabricated in experiments. As shown in Figure 1A, the tested NPMG sample is in a cubic box of 40 nm  40 nm  40 nm.…”

“…In brief, the traditional melt‐quench method is used to generate the typical Cu 50 Zr 50 amorphous alloy 30,31 . Then the network nanomaterials with stochastic bicontinuous structures are established by the phase field decomposition method 19,32,33 . The generated NPMG has identical ligament topological structures to that fabricated in experiments.…”

Molecular dynamics simulations of cold welding of nanoporous amorphous alloys: effects of welding conditions and microstructures

“…In the present study, f (u) = (u 2 À 1) 2 /4 and y = 0.1 are employed following the literature. [43][44][45] To solve eqn (1), we utilize the finite difference method proposed by Sun et al 43,46 Readers can refer to our previous work for detailed information on the preparation of vitreous Cu 50 Zr 50 alloy and bicontinuous nanoporous structures. 24,[47][48][49] The initial cold welding system is illustrated in Fig.…”

Effect of Nanohydroxyapatite on Silk Fibroin–Chitosan Interactions—Molecular Dynamics Study

“…For instance, there are documented correlations between the denaturation temperature characterizing the thermal stability of protein-containing biomaterials and their mechanical and rheological properties [56][57][58]. Importantly, the direct evidence of the relationships between the strength and mechanical properties of intermolecular interactions was demonstrated by studies that explored experimental analysis with molecular dynamics computations [59,60]. Our previous research employed molecular dynamics simulations to explore complexes of chitosan/chitin with collagen [61][62][63] and hyaluronan [64].…”