Thermal-rheology effect and temperature field of engineering polymers

Abstract

The formation and evolution laws of the defect temperature field, heat dissipation in the process of defect evolution were studied. On the basis, the formation and evolution laws of the defect temperature field were investigated, the interaction among defects in the process of defect evolution was carried out. The numerical simulation of the temperature field of ABS was made. The results show that the process of defect evolution is one of energy dissipation, in which the defect temperature field forms due to that its heat dissipation possesses fractal property and its fractal dimension not only relates to the interaction among the defects, but also is the function of time, this incarnates the efficiency of coordinated actions of striding over the different gradations in the process of defect evolution and among gradations. The increase of the local temperature with the increase of deformation-induced heating effect in ABS is obvious. Moreover, the shape of plastic zone and inner heat source density function has big effect on the temperature field.

Keywords

temperature field / heat dissipation / plastic zone / numerical simulation

References

[1] XiaM.-f., HanW.-s., KeF.-j., BaiY.-long.. Statiscal meso-scopic damage mechanics and damage evolution induced catastrophe(I)[J]. Advances in Mechanics, 1995, 25(1): 1-40

[2] KachanovL. M.Introduction to continuum damage mechanics[M], 1986, Netherlands, Dordrechet Maritinus Nijhoff Publishers

[3] CurranD. R., ShockeyD. A., SeamanL.. Dynamic fracture criteria for a polycarbonate[J]. J Appl Phys, 1973, 44(9): 4025-4038

[4] SmalleyR. F., TurcotteD. L., SollaS.. Renormalization group approach to the stick-slip behavior of faults[J]. J Geophys Rev, 1985, 90(B2): 1894-1900

[5] TURCOTTE P L, SMALLEY R F. Statistical models for the fracture of disordered media[M]. Elsevier Science Press B.V., 1990.

[6] LuoW.-b., YingT.-q., LiZ.-da.. Experimental studies on the temperature fluctuations in deformed thermoplastics with defects[J]. J Solid & Structures, 2000, 37(6): 887-897

[7] LiZ.-d., LiuH.-j., ZhangR.-feng.. Research on time-temperature stress superposition principles of PMMA’ crazing damages under creep condition, advances in rheology and its applications[C]. Proceedings of the 4th Pacific Rim Conference on Rheology, 2005, Changsha, Central South University Press: 739-744

[8] LiZ.-d., YiH., ZhangR.-feng.. Experimental research on temperature dependence of PMMA’s crazing damage[J]. Journal of Wuhan University of Technology: Transportation Science and Engineering, 2005, 29(4): 478-480

[9] XiaM.-f., KeF.-j., LuY.-h., BaiY.-long.. Effects of stochastic extrension in ideal microcrack system[J]. Science in China (Series A), 1991, 34(5): 579-589

[10] YuanL.-wei.Rheology of bodies with defects[M], 1994, Beijing, National Defence Industry Press

[11] YuanL.-w., LiZ.-da.. On the rheological and dissipative phenomena in the process of crack propagation(I), (II)[J]. Nat Sci J Xiangtan Uni, 1989, 11(1): 33-63

[12] YuanL.-w., ZhiR.-b., LiZ.-da.Rheology fracture[M], 1992, Beijing, National Defence Industry Press

[13] ChristensenR. M.Theory of viscoelasticity, an introduction[M], 1982, New York, Academic Press