PSI - Issue 25

Wojciech Danek et al. / Procedia Structural Integrity 25 (2020) 19–26 Author name / Structural Integrity Procedia 00 (2019) 000 – 000

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3.2. Boundary conditions Two approaches of the support of the composite plate were analyzed (see Fig. 4). In the first approach, the composite plate was supported using boundary conditions, where every rotational and translational DOF was fixed. This approach allows reducing the number of elements appearing in the numerical simulation. In the second approach, the composite plate was supported on additional component. The shape of the additional component is the reflection of a support plate applied in the experimental test stand (see Fig. 1). A stiffness of this element is much higher than the composite plate, thus it was modeled as a rigid body in order to reduce the computational time.

a)

b)

Fig. 4. Two approaches to modeling the support of the composite plate a) support using boundary conditions b) support using the additional element.

Based on the results obtained from numerical simulations it was determined that for the case of supporting the composite plate using boundary conditions the damaged surface area is equal to 234 mm 2 and for supporting using the additional element it is equal to 269 mm 2 . Additionally, the extracted maps of von Misses stress for both cases are presented in Fig. 5.

a)

b)

Fig. 5. Von Misses stress map after the impact for the plate a) supported using boundary conditions b) supported using the additional element.