|
|
|
| NON-LINEAR INTERNAL FRICTION PHENOMENA ASSOCIATED WITH FLOWING AND CRACKING OF ADHESIVE IN MARX METHOD |
| Sun Zongqi (Institute of Metal Research; Academia Sinica; Shenyang) |
|
Cite this article:
Sun Zongqi (Institute of Metal Research; Academia Sinica; Shenyang). NON-LINEAR INTERNAL FRICTION PHENOMENA ASSOCIATED WITH FLOWING AND CRACKING OF ADHESIVE IN MARX METHOD. Acta Metall Sin, 1982, 18(3): 293-301.
|
|
|
Abstract The "operation effects" resulted from various adhesives were quantitatively evaluated during measuring the internal friction and modulus defect of low damping specimens by Marx-method. It was observed that the background of internal friction for some weak adhesives, e. g., phenyl salicylate, water glass mixture, etc. seems to be neither negligible nor constant value which is dependent on such factors as their temperature, thermal stress, time, dryness and strain amplitude, similar to that of dislocation damping. Two resonant peaks were observed for high temperature thermospalled adhesives with cracks. The internal friction measured at an anomalous resonant peak with slightly higher frequency decreases with increasing of the strain amplitude or the exciting time at high amplitude and increases with aging under lower amplitude. Peaking effects were found on the plot of internal friction vs strain amplitude or time when the resonant frequency of anomalous peak closed to the normal one. The hysteresis loops were observed on the plots of resonant amplitude vs frequencies. In certain combination of non-linear resonant hysteresis loop with aging effect, the almost periodic jumps of the repeatable amplitude of specimens may be presented. The aforementioned phenomena had vanished by using a high temperature and high strength adhesive, but the cracking of quartz dumb bar and plastic flow of specimen undergone by the thermal stress. An approach to its applicability and improvement has also been attempted.
|
|
Received: 18 March 1982
|
1 Lenz,D.,私人通讯
2 章安庆,未发表工作.
3 Weller,M.,私人通讯.
4 Thompson, D. O., Internal Friction and Ultrasonic Attenuation in Solids, Ed. Hasiguti, R.R.; Mikoshiba, N., University of Tokyo Press., 1977．
5 Iwasaki, Y.; Imanaka, T.; Fujimoto, K., ibid, p. 803．
6 Marx, J. W., Rev. Sci. Inst., 22 (1951) , 503．
7 Niblett, D. H.; Wilks, J., Adv. Phys., 9 (1960) , 1．
8 Takahashi, S., J. Appl. Phys., 23 (1952) , 866．
9 Kessler, J. O., Phys. Rev., 106 (1957) , 646．
10 Simpson, M.; Finlayson, T. R.; Smith, T.F., J. Phys., D 11 (1978) , 453．
11 Caswell, H. L., J. Appl. Phys., 29 (1958) . 1210．
12 Hiki, Y., J. Phys. Soc. Jpn., 13 (1958) . 1138．
13 Robinson, W. H.; Edgar, A., IEEE Trans. Sorties Ultrason., SU-21 (1974) , 98．
14 Robinson, W. H.; Carpenter, S. H.; Tallon, J. L., J. Appl. Phys., 45 (1974) , 1975．
15 Sakamoto, K., Scr. Metall., 10 (1976) , 399．
16 Huber, R. J.; Poker, G. S.; Gibs, P., J. Appl. Phys., 32 (1961) , 2488．
17 孙宗琦,待发表 |
| No Suggested Reading articles found! |
|
|
Viewed |
|
|
|
Full text
|
|
|
|
|
Abstract
|
|
|
|
|
Cited |
|
|
|
|
| |
Shared |
|
|
|
|
| |
Discussed |
|
|
|
|
