PSI - Issue 72

Mohamed Khodjet Kesba et al. / Procedia Structural Integrity 72 (2025) 164–171

170

C1=0,05+Aging C1=0,1+Aging C1=0,15+Aging

C1=0,05 C1=0,1 C1=0,15

SIG Y

120,0Mpa

100,0Mpa

SIG Y

100,0Mpa

80,0Mpa

80,0Mpa

60,0Mpa

60,0Mpa

40,0Mpa

-0,6

-0,4

-0,2

0,0

0,2

0,4

0,6

-0,6

-0,4

-0,2

0,0

0,2

0,4

0,6

Z(mm)

Z(mm)

40,0Mpa

20,0Mpa

20,0Mpa

0,0pa

-20,0Mpa

0,0pa

Fig.4: Stress behavior with humidity change (Aging/Non-Aging case, HR2=25%, T=30°C)

C0=0,01+Aging C0=0,03+Aging C0=0,005+Aging

C0=0,01 C0=0,03 C0=0,005

60,0Mpa

60,0Mpa

SIG X

SIG X

40,0Mpa

40,0Mpa

20,0Mpa

20,0Mpa

0,0pa

0,0pa

-0,6

-0,4

-0,2

0,0

0,2

0,4

0,6

-0,6

-0,4

-0,2

0,0

0,2

0,4

0,6

Z(mm)

-20,0Mpa

Z(mm)

-20,0Mpa

-40,0Mpa

-40,0Mpa

-60,0Mpa

-60,0Mpa

-80,0Mpa

-80,0Mpa

C0=0,01+Aging C0=0,03+Aging C0=0,005+Aging

C0=0,01 C0=0,03 C0=0,005

60,0Mpa

60,0Mpa

SIG Y

SIG Y

40,0Mpa

40,0Mpa

20,0Mpa

20,0Mpa

0,0pa

0,0pa

-0,6

-0,4

-0,2

0,0

0,2

0,4

0,6

-0,6

-0,4

-0,2

0,0

0,2

0,4

0,6

Z(mm)

Z(mm)

-20,0Mpa

-20,0Mpa

-40,0Mpa

-40,0Mpa

-60,0Mpa

-60,0Mpa

-80,0Mpa

-80,0Mpa

Fig.5: Stress behavior with Reference hymidity change (Aging/Non-Aging case, , HR1=60%,HR2=25%,T=30°C)

6. Interpretations Fig.2 -5 represent the residual transverse stresses of the composite laminate through thickness. The first point to note about the stress curves is that they are not symmetrical with respect to Z axis, despite the fact that the layers of the laminate are symmetrical. The behavior is mainly driven by the moisture concentration distribution determined by the environment of the two facets of the laminate; the most aggressive side in terms of stress is related to the environment of a high moisture content. The results analysis shows the dependence of the stress state and the environmental parameters, the magnitude order of the hygroscopic stresses is much higher than the thermal stresses.