PSI - Issue 28

Saiaf Bin Rayhan et al. / Procedia Structural Integrity 28 (2020) 1901–1908 Author name / Structural Integrity Procedia 00 (2019) 000–000

1904

4

In the second step, after achieving the mechanical properties of the lamina, a 16-layer quasi-isotropic symmetric laminate with an orientation code [0°/45°/-45°/90°] 2s is modeled. The dimension of the plate is chosen as length = 300 mm, width = 200 mm, thickness = 2.4 mm (0.15 mm × 16). To investigate the critical buckling load of the woven composite plate, Ansys Static Structural is employed and a uniform load is given to one of the shorter edges of the plate, which is simply supported (pinned), while the other shorter edge is kept fixed. On the other hand, the longer edges are kept free. After the solution, a load multiplier is generated by the solver as the critical buckling load of the plate. The complete multiscale analysis procedure can be found in Fig. 2.

Figure 2. Multiscale analysis chart

3. Scope of parametric studies In this present study, four geometric parameters of RVE were investigated; the three were kept as constants while the other one was utilized as a variable to examine the effect of that specific parameter on the critical buckling load of the woven laminated plate, Table 3. Both the constant parameter values and the variable ranges are chosen to adopt the experimental and numerical possibilities found in the literature (Aliabadi (2015)). Besides, for all the investigated cases, the shear angle of the weave is assumed as 0 0 .

Table 3. Constant parameters and variables

No.

Case Study

Constant Parameters

Value

Variable

Range

I

Effect of fiber volume fraction

Yarn fiber volume fraction Yarn spacing Fabric thickness

0.755 1 mm 0.188 mm 0.55 1 mm 0.188 mm

Fiber volume fraction

0.2 – 0.7

II

Effect of yarn fiber volume fraction

Fiber volume fraction Yarn spacing Fabric thickness

Yarn fiber volume fraction

0.2 – 0.8

III

Effect of fabric thickness

Fiber volume fraction Yarn fiber volume fraction Yarn spacing Fiber volume fraction Yarn fiber volume fraction Fabric thickness

0.55 0.755 1 mm

Fabric thickness

0.188 mm – 0.216 mm

IV

Effect of yarn spacing

0.55 0.755 0.188 mm

Yarn spacing

0.5 mm – 2 mm

4. Finite element setup To mesh both the twill and weave type RVEs, solid elements with conformational and periodic meshing are adopted, Fig. 3 (A). The conformational meshing assures the shared topology of nodes at interfaces, while the periodic meshing is preferred for periodic boundary conditions. Ansys Material Designer provides both the option to select periodic and non-periodic boundary conditions. However, for the current analysis, the periodic boundary condition is