Effect of hygrothermal treatment on the tensile properties - ethesis ...

Table 4.5:
Average values <strong>of</strong> Displacement corresponding to first fibre failure
Temp. <strong>of</strong>
press
Time
60 0 C 80 0 C 100 0 C
0 hrs 1.144 mm 1.115 mm 0.943 mm
4 hrs 1.433 mm 1.495 mm 1.192 mm
16 hrs 1.444 mm 1.381 mm 1.304 mm
64 hrs 1.305 mm 1.437 mm 1.199 mm
Table 4.6:
Average value <strong>of</strong> Energy at yield point
Temp. <strong>of</strong>
press
Time
60 0 C 80 0 C 100 0 C
0 hrs 1.973 J 1.998 J 0.838 J
4 hrs 0.680 J 0.774 J 0.577 J
16 hrs 0.397 J 0.657 J 0.379 J
64 hrs 0.530 J 0.462 J 0.432 J
Fig. 4.1: Average Longitudinal Tensile Stress <strong>of</strong> samples hot-pressed at 60, 80 and
100 0 C
Stress (MPa)
90
80
70
60
50
40
30
20
10
Average Longitudinal Tensile Stress
0
0 10 20 30 40 50 60 70
Duration <strong>of</strong> Hygrothermal Treatment, t (in hours)
60
80
100
28