An investigation of the heat generated during cyclic loading of two glassy polymers. Part II: Thermal analysis

被引：64

作者：

Rittel, D ^{[1
]}

Rabin, Y ^{[1
]}

机构：

[1] Technion Israel Inst Technol, Fac Mech Engn, IL-32000 Haifa, Israel

来源：

MECHANICS OF MATERIALS | 2000年 / 32卷 / 03期

基金：

以色列科学基金会;

关键词：

glassy polymer; PMMA; PC; thermomechanical coupling; hysteretic heating; cyclic loading; numerical solution; thermal analysis;

D O I：

10.1016/S0167-6636(99)00052-6

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

This paper presents the thermal analysis of cyclic compression experiments which were carried out on commercial PC and PMMA cylindrical specimens. The thermal problem is solved numerically (finite element). Uniform internal heat generation is assessed from the experimental evolution of the hysteretic energy rate throughout the experiment. The results show a very good agreement between the calculated and the measured temperatures. The temperature peak which characterized the PC specimens and the continuously rising temperature of the PMMA cylinders are very well reproduced using simple assumptions of uniform heat generation and a constant ratio of the thermal to mechanical pou-er conversion (beta = 0.5). The mathematical solution provides information on the temperature distribution and its dependence on the boundary conditions (insulation of the specimen from the platens). These results are discussed with respect to surface temperature sensing of polymeric materials. (C) 2000 Elsevier Science Ltd. All rights reserved.

引用

页码：149 / 159

页数：11

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