Size effects in polyurethane bonds: experiments, modelling and parameter identification
Size effects in polyurethane bonds: experiments, modelling and parameter identification
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聚氨酯粘结剂的尺寸效应:实验、建模和参数识别
DOI:
10.1007/s10853-008-2674-2
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发表时间:
2008
影响因子:
4.5
通讯作者:
W. Possart
中科院分区:
文献类型:
--
作者:
M. Johlitz;S. Diebels;J. Batal;H. Steeb;W. Possart
In this study we examine polyurethane bonds of varying thickness between anodised aluminium substrates. The performed shear tests showed an intriguing size effect of the kind “thinner equals softer”. This size effect occurs not only in the basic elasticity (relaxed state), but also in the viscoelastic behaviour of the tested material. The cause of such size effects is supposed to be found in the existence of so-called interphases or boundary layers, which may differ considerably from the bulk in terms of mechanical behaviour, thus having an enormous impact on thin bonds. In thick bonds, however, these interphases or boundary layers have a minor effect on the overall mechanical behaviour. To account for these experimental results in bond modelling, an extended phenomenological continuum mechanics-based model, which explicitly includes such size effects in its calculation, is developed and presented. For this purpose, an abstract structure parameter with its corresponding balance equation is established describing the formation of the interphases by means of a phase transition. This makes it possible to define the bond stiffness at a macroscopic level, without entering into the microstructure. The extended model brings up a set of model parameters, which are determined efficiently by an ES (evolution strategy). The study concludes with a summary and an outlook on our further research work.
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DOI:
--
发表时间:
1994
期刊:
影响因子:
--
作者:
P. Tallec;C. Rahler
通讯作者:
C. Rahler
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
H. Steeb;S. Diebels
通讯作者:
S. Diebels
影响因子:
6.5
作者:
Zhang, Jiadong;Cui, Zhiming;Shi, Zhenwei;Jiang, Yingjia;Zhang, Zhiliang;Dai, Xiaoting;Yang, Zhenlu;Gu, Yuning;Zhou, Lei;Han, Chu;Huang, Xiaomei;Ke, Chenglu;Li, Suyun;Xu, Zeyan;Gao, Fei;Zhou, Luping;Wang, Rongpin;Liu, Jun;Zhang, Jiayin;Ding, Zhongxiang;Sun, Kun;Li, Zhenhui;Liu, Zaiyi;Shen, Dinggang
通讯作者:
Shen, Dinggang
影响因子:
3.4
作者:
A. Roche;J. Bouchet;S. Bentadjine
通讯作者:
S. Bentadjine
影响因子:
1.5
作者:
A. Lion
通讯作者:
A. Lion