Issue 49

A. En-najiet alii, Frattura ed Integrità Strutturale, 49 (2019) 748-762; DOI: 10.3221/IGF-ESIS.49.67

The tensile specimens, illustrated in Fig.1, were prepared according to the ASTM Standard D638-03 [14] method of tests for the tensile properties of plastics.

Figure 1: Dimensions of specimens according to ASTM D638-03[14].

Symbol

Description Total lengh

Size (mm)

L 0 D

75 42 25 20

Initial distance between jaws Lengh of the calibrated part Lenth between landmarks With of the calibrated Small radius of curvature

L

G W

4 8

R

W0

Widths at the ends

14

B 2 Table 1: The dimensions of dumbbell specimen for tensile test. Fig.2 illustrates the evolution of the stress applied to the specimens (MPa) as a function of the deformation, ℇ (%). The general appearance of this curve exhibits ductile behavior. thikness

Figure 2: Tensile stress-Deformation curvedumbbell specimen.

It can be observed from Fig. 2 that the curve includes four zones, each of which reveals a particular mechanical behavior of the material (ABS) during the tensile test. Zone 1 (linear): this is the reversible elastic deformation of the material owing to the amorphous phase.

750