Development of Accelerated Lifetime Testing Technique of Engineering Plastics

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Periodical:

Key Engineering Materials (Volumes 345-346)

Edited by:

S.W. Nam, Y.W. Chang, S.B. Lee and N.J. Kim

Pages:

1341-1344

Citation:

G. H. Kim and H. B. Lu, "Development of Accelerated Lifetime Testing Technique of Engineering Plastics", Key Engineering Materials, Vols. 345-346, pp. 1341-1344, 2007

Online since:

August 2007

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$38.00

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[2] R. Estevez, M.G.A. Tijssens, E. Van der Giessen: Journal of the Mechanics and Physics of Solids 48 Vol. 12(2000), p.2585.

[3] O.A. Hasan, M.C. Boyce: Polymer Engineering and Science 35 Vol. 4(1995), p.331.

[4] R.A. Schapery: Polymer Engineering and Science Vol. 9(1969), p.295.

[5] W.G. Knauss, I.J. Emri: Journal of Comput. Structures 13 Vol. 1-3(1981), p.123.

[6] H. Lu, W.G. Knauss: Mechanics of Time-Dependent Materials Vol. 2(1999), p.307.

[7] G. Kim: Trans. of the KSME(A), Vol. 30(2006), p.976 Log (Nf) Stress (MPa).

[3] 4 5 6 7.

[10] [20] [30] [40] [50] [60] Fig. 1. S-N data with frequency of 1. 0 Hz at 23 C o . Fig. 2. Short-term S-N curves at different temperatures with frequency of 0. 3 Hz. Log (Nf) Stress (MPa).

[3] 3. 5 4 4. 5 5 5. 5 6.

[10] [20] [30] [40] [50] [60] Temperature (oC) Log(aT).

[20] 30 40 50 60 70 -1. 4 -1. 2 -1 -0. 8 -0. 6 -0. 4 -0. 2.

0. 2 Fig. 3. Master S-N curve with reference temperature of 23 C o at 0. 3 Hz frequency. Fig. 4. Time-temperature shift factors of 1Hz at a reference temperature of 23 C o . Log (Nf) Stress (MPa).

[3] 3. 5 4 4. 5 5 5. 5 6.

[10] [20] [30] [40] [50] [60] Master S-N at 0. 3HzActual S-N at 1Hz Fig. 5. S-N curve comparison between 1. 0 and 0. 3 Hz. Log (Nf) Stress (MPa).

[3] 4 5 6 7.

[20] [30] [40] [50] [60] Stress (MPa) ∆Τ.

[30] 35 40 45 50 55 60.

[2] [4] [6] [8] [10] [12] [14] [16] [18] [20] Fig. 6. S-N data with frequency of 10 Hz at ambient condition. (The dotted line is for 1. 0 Hz. ) Fig. 7. Surface temperature rise at different stress amplitudes at 10 Hz and 23 C o . Log (Nf) Stress (MPa).

[3] 3. 5 4 4. 5.

[10] [20] [30] [40] [50] [60] 23oC 40oC 60oC Log (Nf) Stress (MPa).

[3] 4 5 6 7.

[20] [30] [40] [50] [60] Master S-N Actual S-N Prediction Fig. 8. Prediction of 1. 0 Hz S-N curve using.

[10] Hz data and ALT method.

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