PSI - Issue 61

Yogesh Kumar et al. / Procedia Structural Integrity 61 (2024) 322–330 Y. Kumar et al., / Structural Integrity Procedia 00 (2019) 000 – 000

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(DIC) high-speed camera. The MTS machine and the camera were triggered manually, and the synchronization was performed during the post-processing by shifting the rise in the stress-time (from MTS) and strain-time (from DIC) so that they initiate together.

Fig. 1. Experimental setup for the quasi-static in-plane compression of the carbon-fiber-reinforced-polymer cross-ply composite. The setup includes AOS Promon Camera for digital image correlation (DIC) and FLIR Thermal IR Camera. Dimensions of the three different samples used in this study are also shown (red box).

Table 1. Material properties of the CFRP laminate (Liu et al., 2023, 2022; Vigón et al., 2022). Properties Symbol [Unit] Value Density ρ [kg/m 3 ] 1550 Poisson’s ratio v ab , v ca , v cb 0.34 Initial modulus E a [GPa] 120 Elastic modulus E b , E c [GPa] 8.2 In-plane shear strength S c [MPa] 99 Shear moduli G ab , G cb , G ca [MPa] 3.6 Longitudinal tensile strength X t [MPa] 2282 Transverse tensile strength Y t [MPa] 54 Longitudinal compressive strength X c [MPa] 1067 Transverse compressive strength Y c [MPa] 200

3. Finite Element Modeling A three-dimensional (3D) finite element model (FEM) for in-plane compression of composite under quasi-static loading was developed using the LS-Dyna pre-post and explicit solver. The model contains solid elements to represent the different layers in the laminate and the rigid loading plate, and [*AUTOMATIC_ONE_WAY_SURFACE_TO_SURFACE\TIEBREAK] contact definition for the interlaminar behaviour between the 0° and 90° plies. The loading plate was modelled as a rigid body with the steel properties utilizing the [*MAT_20_RIGID] material model. Additional mass was assigned to the loading plate using [*ELEMENT_MASS_PART] card. The composite specimen was meshed using the Type-1 fully integrated solid