Browse Publications Technical Papers 2014-01-1056
2014-04-01

High Strain Rate Mechanical Properties of Long Glass Fiber Filled Polypropylene and Nylon 2014-01-1056

The American Chemistry Council sponsored program to optimize a specimen design for use in high strain rate testing of long fiber-reinforced thermoplastics (LFRT) was experimentally validated through testing of injection molded long glass-filled polypropylene (LGFPP) and long glass filled Nylon ® (Nylon). It was demonstrated that the dynamic specimen geometry generated valid results for LFRT tensile tests in the quasi-static through 400/s regime. Optimum specimen size depended on the maximum test rates and end use of the data. The program results provide a basis to select specimen parameters to appropriately represent LFRT or similar materials for comparison or material property testing.
Tests established the effects of injection technique; strain rate (nominal 0.1/s to 400/s); fiber fill content (20wt%, 30wt%, 40wt%), specimen type and width, panel thickness, distance to the fill gate, flow orientation, and material homogeneity. Not all variables were tested using material from both vendors.
For a given LGFPP specimen size and vendor, the strength and modulus increased with fiber content, specimen width, and nominal strain rate. The LGFPP strength and failure strain increased between 0.001/s and 4/s but remained constant between 4/s and 45/s. Macroscopic and microscopic examinations of the fractures surfaces showed a strong mechanical bond between the fibers and the matrix.
The Nylon demonstrated no difference in the strength between specimens identified with large or small amounts of fiber clusters. The ultimate strength, yield strength, and modulus of Nylon° increased between 0.001/s and 45/s. The failure strain decreased between 0.001/s and 45/s.

SAE MOBILUS

Subscribers can view annotate, and download all of SAE's content. Learn More »

Access SAE MOBILUS »

Members save up to 18% off list price.
Login to see discount.
Special Offer: Download multiple Technical Papers each year? TechSelect is a cost-effective subscription option to select and download 12-100 full-text Technical Papers per year. Find more information here.
We also recommend:
JOURNAL ARTICLE

Featherweight Composites Manufactured by Selective Nanobridization with Potential Applications in the Automotive Industry

2014-01-1061

View Details

TECHNICAL PAPER

Modeling and Simulating Progressive Failure in Composite Structures for Automotive Applications

2014-01-0962

View Details

JOURNAL ARTICLE

High Speed Reactive Resin Transfer Moulding (RTM) Process Simulation for Mass Production of Automotive Structural Parts

2015-01-0722

View Details

X