Predictive Engineering Tools for Injection-Molded Long-Carbon-Fiber Thermoplastic Composites - FY 2016 First Quarterly Report

Predictive Engineering Tools for Injection-Molded Long-Carbon-Fiber Thermoplastic Composites. Topical Report

“…Modest changes in fiber length in this high aspect ratio range have very little effect on the composite elastic moduli. The saturation of the composite elastic moduli with increasing fiber aspect ratio was demonstrated and discussed in our previous reports [8,12]. Table 12.…”

“…In this work, the fiber orientations measured by Virginia Tech (see Figures 25 to 28, also reported in [11]) at the selected locations were used in the computation of moduli in the local measurement coordinate system. ASMI predictions of FLDs compared to Virginia Tech measured data for the 30 wt% LCF/PP and 30 wt% LCF/PA66 ribbed parts have been reported previously [12]. This section illustrates the validation of the ASMI predictions for the 30 wt% LCF/PA66 ribbed part.…”

“…The accomplishments by the team members were reported in detail in quarterly reports [2][3][4][5][6][7][8][9][10][11][12]. In this topical report, a succinct summary of the accomplishments is provided.…”

“…Virginia Tech applied an established method to perform fiber length measurements for the coupon samples taken at Locations A, B, C and D of the complex ribbed parts molded from the 30 wt% LCF/PP and 30 wt% LCF/PA66 materials [12]. The procedure used by Virginia Tech to measure fiber length is summarized in the following 8 steps: 1.…”

“…PNNL repeated the injection molding simulations of the 30 wt% LCF/PP and 30 wt% LCF/PA66 ribbed parts to predict flow-induced fiber length distributions following receipt of a new ASMI research version from Autodesk on 01/31/2016 [12]. All the measured FLDs expressed in terms of corrected numbers of fibers vs. fiber length received from Virginia Tech were converted into weight-of-fiber vs. fiber length distributions for comparison with the predicted results at Locations A, B, C and D on these parts.…”