PSI - Issue 38

S. Spanke et al. / Procedia Structural Integrity 38 (2022) 220–229 Author name / Structural Integrity Procedia 00 (2021) 000±000

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(a) E 22 -Modul

(b) E 11 -Modul

Fig. 7. (a) Boxplot E 22 -Modul across the fiber; (b) Boxplot E 11 -Modul in fiber direction.

For the RVE models with the fiber distribution algorithms, 3 fiber distributions were built for each traverse speed. For the symmetrical fiber arrangements, one model per traverse speed was built in each case.

3.3. Stress analysis of highly stressed area with RVE systems

Another field of application of the RVE systems is the analysis of highly stressed areas of components. For this purpose, the strain state of the highly stressed component area is transferred to the RVE system (see equation 14-16) and the stresses are observed and evaluated on a microstructural level. In the figure 8, this procedure is shown on the 4-point bending test. The highly loaded one that is analyzed is located in the center of the longitudinal axis of the specimen at the surface. The load applied to the pressure fins is F = 70.57 N, which was measured at specimen failure on the 4-point bending test.

(a) Highly stressed component area

(b) RVE system, fiber, Matrix and interface

Fig. 8. Stress analysis of highly stressed area with RVE systems: (a) Highly loaded component area of the 90° oriented specimen, fiber volume fraction 68 %. ; (b) RVE system.

Table 2 shows the stresses of the specimen and the stresses of the RVE system for fiber, matrix and interface.