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

Figure 6

Crack propagation direction: (a) propagation direction of the horizontal specimen; (b) propagation direction schematic of the horizontal specimen; (c) propagation direction of the vertical specimen; (d) propagation direction schematic of the vertical specimen.

(a)

(b)

(c)

(d)