Study of anisotropic mechanical properties for aeronautical PMMA

Abstract

For the properties of polymer are relative to its structure, the main purpose of the present work is to investigate the mechanical properties of the aeronautical PMMA which has been treated by the directional tensile technology. Isodyne images reveal the stress state in directional PMMA. And then, an anisotropic mechanical model is established. Furthermore, all mechanical parameters are measured by the digital image correlation method. Finally, based on the anisotropic mechanical model and mechanical parameters, the FEM numerical simulation and experimental methods are applied to analyze the fracture mechanical properties along different directions.

Understanding significantly reinforced polymethyl methacrylate composites induced by two‐dimensional Tin+1Cn from an atomistic perspective

“…At this strain rate, the yield stress of the PMMA matrix was calculated as 188.5 MPa, which was in good agreement with other studies reporting values of 167 and 174 MPa 49,50 . The Young's modulus of the PMMA matrix was also calculated as 2.82 GPa, falling in the range of 2.07–6.20 GPa at room temperature (300 K), and this was consistent with the literature 51–53 . These results indicated that the ReaxFF force field was suitable for simulating the mechanical properties of the PMMA system and the set parameters were reasonable.…”

“…49,50 The Young's modulus of the PMMA matrix was also calculated as 2.82 GPa, falling in the range of 2.07-6.20 GPa at room temperature (300 K), and this was consistent with the literature. [51][52][53] These results indicated that the ReaxFF force field was suitable for simulating the mechanical properties of the PMMA system and the set parameters were reasonable. We also performed tensile simulations for the Ti 2 C/PMMA and Ti 3 C 2 /PMMA nanocomposites at the same strain rate, and the stressstrain curves are also presented in we conducted simulations to analyze the distribution of volume strain and atom density during the tensile process, as shown in Figures 5 and 6.…”

Effect of Molecular Chain Structure on Fracture Mechanical Properties of Aeronautical Polymethyl Methacrylate Using Extended Digital Image Correlation Method

“…The fracture mechanical properties depend on the molecular chain structures. Therefore, the isotropic mechanical model is unable to describe the mechanical properties of oriented PMMA [17].…”

Effect of the Reinforce Process on the Fatigue Fracture Properties of Aeronautical Polymethyl Methacrylate

“…Currently, fatigue properties of PMMA were studied primarily based on the isotropic assumption. The author has proposed an anisotropic mechanical model for directional PMMA [12]. This research tracked the growth of fatigue cracks in directional PMMA by a stroboscopic method.…”