ABSTRACT Ultrasonic fatigue tests were carried out on the plastic material Nylon 6. Special attention was devoted to the temperature control in order to avoid physic-chemical transformation of this low melting point material. Under ultrasonic fatigue tests, important heat dissipation takes place at the narrow section of hourglass shape specimen leading to high temperature at this zone. The specimen was calculated to meet the resonance condition with the smallest dimensions at its narrow section, with aim to reduce the temperature gradient at this zone of this non heat conducting material. Temperature at narrow section was maintained lower than 45℃ using a cooling system with cooling air; under this condi- tion the ultrasonic fatigue tests were performed. Experimental tests were carried out at low loading range (9 - 12.5% of the elastic limit of material) in order to control the highest temperature and to avoid that specimen was out of resonance condition. Experimental results are analyzed together with the fracture surfaces and conclusions are presented concerning the ultrasonic fatigue endurance of this polymeric material.
Cite this paper
nullG. Almaraz and E. Gómez, "Ultrasonic Fatigue Endurance Investigation on Plastic Material Nylon 6," Materials Sciences and Applications, Vol. 2 No. 9, 2011, pp. 1293-1297. doi: 10.4236/msa.2011.29174.
 E. Lokensgard, “Industrial Plastics: Theory and Applications,” Fifth Edition, Delmar-Cengage-Learning Edition, Albany, New York, 2010, 560 Pages.
D. Peri?, M. Vaz Jr. and D. R. J. Owen, “On Adaptive Strategies for Large Deformations of Elasto-Plastic Solids at Finite Strains,” Computational Issues and Industrial Applications, Computer Methods in Applied Mechanics and Engineering, Vol. 176, No. 1-4, 1999, pp. 279-312.
H. Becker and L. E. Locascio, “Polymer Microfluidic Devices” Talanta, Vol. 56, No. 2, 2002, pp. 267-287.
J. J. Huang and D. R. Paul, “Comparison of Fracture Behavior of Nylon 6 Versus an Amorphous Polyamide Toughened with Maleated Poly (ethylene-1-octene) Elastomers,” Polymer, Vol. 47, No. 10, 2006, pp. 3505-3519.
T. Liu, I.Y. Pang, L. Shen, S. Y. Chow and W.-D. Zhang, “Morphology and Mechanical Properties of Multiwalled Carbon Nanotubes Reinforced Nylon-6 Composites,” Macromolecules, Vol. 37, No. 19, 2004, pp. 7214-7222.
L. Huang, E. Allen and A. E. Tonelli, “Inclusion Compounds Formed Between Cyclodextrins and Nylon 6,” Polymer, Vol. 40, No. 11, 1999, pp. 3211-3221.
Y. Li, Z. Huang and Y. Lu, “Electrospinning of Nylon-6, 66,” Terpolymer European Polymer Journal, Vol. 42, No. 7, 2006, pp. 1696-1704.
M. G. Wyzgoski and G. E. Novak, “Fatigue-Resistant Nylon Alloys,” Journal of Applied Polymer Science, Vol. 51, No. 5, 1994, pp. 873-885.
Y. Miyano, M. Nakada and R. Muki, “Prediction of fatigue life of a conical shaped joint system for fiber reinforced plastics under arbitrary frequency, load ratio and temperature,” Mechanics of Time-Dependent Materials, Vol. 1, No. 2, 1997, pp. 143-159.
W. Chen and F. L. Cheng, “Tension and Compression Test of Two Polymers under Quasi-Static and Dynamic Loading,” Polymer Testing, Vol. 21, No. 2, 2002, pp. 113-121. doi:10.1016/S0142-9418(01)00055-1
N. Jia and N. V. A. Kagan, “Effects of Time and Temperature on the Tension-Tension Fatigue Behavior of Short Fiber Reinforced Polyamides,” Polymer Composites, Vol. 19, No. 4, 1998, pp. 408-414.
L. W. McKeen, “Fatigue and Tribological Properties of Plastics and Elastomers,” 2nd Edition, William Andrew Publishing, Amsterdam, 2010, 312 Pages, ISBN: 978-0- 08-096450-8.
H. Van Melick and H. K. Van Dijl, “High-Temperature Testing of Stanyl Plastic Gear: A Comparison with Tensile Fatigue Data,” Gear Technology, 2010, pp. 59-65.
M. Jenkins, J. Snodgrass, A. Chesterman, R. H. Dauskardt and J. C. Bravman, “Atomic Force Microscopy Studies of Fracture Surfaces From Oxide/Polymer Interfaces,” Materials Research Society Symposium, Vol. 654, 2001, pp. AA2.7.1-AA2.7.5.