ISSN:
0032-3888
Keywords:
Chemistry
;
Chemical Engineering
Source:
Wiley InterScience Backfile Collection 1832-2000
Topics:
Chemistry and Pharmacology
,
Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
,
Physics
Notes:
The impact response of a glass fiber reinforced polypropylene was studied in a 3-point drop-weight impact test between -15 and 85°C and at a constant impact velocity of 2.2 m/s (5 mph). The response is a combination of tension and shear and can be expressed in terms of an apparent modulus, EA: 1 \documentclass{article}\pagestyle{empty}\begin{document}$$\frac{1}{{E_A }} = \frac{1}{{E_{11} }} + \frac{6}{{5G_{12} }}\left({\frac{d}{l}} \right)^2$$\end{document}.Where E11 is the tensile modulus, G12: shear modulus, d: specimen thickness, and l: specimen length.For a 40 weight-percent glass reinforced polypropylene, E11 was found to have a room temperature value of 5.8 GPa, and shear modulus of 0.43 GPa. Both decreased with temperature increase, with the shear modulus showing greater sensitivity to a temperature change. The fracture initiation and propagation energies were relatively independent of temperature. The fracture initiation energy per unit deformed volume was of the order of 1 MJ/m3. The total fracture energy was found to be sensitive to l/d: about 7 MJ/m3 at l/d of 5.3 and about 1.7 MJ/ m3 at l/d of 16.
Additional Material:
6 Ill.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1002/pen.760251407
