Large deformation rate-dependent stress-strain behavior of polyurea and polyurethanes

被引:388
作者
Yi, J
Boyce, MC
Lee, GF
Balizer, E
机构
[1] MIT, Dept Mech Engn, Cambridge, MA 02139 USA
[2] USN, Ctr Surface Warfare, Silver Spring, MD 20903 USA
关键词
rate-dependence; stress-strain behavior; polyurethane;
D O I
10.1016/j.polymer.2005.10.107
中图分类号
O63 [高分子化学(高聚物)];
学科分类号
070305 ; 080501 ; 081704 ;
摘要
The thermoplastic elastomer polyurethane and the elastomeric thermoset polyurea are finding new applications in increasing the survivability of structures under impact loading, including those encountered in blast and ballistic events. However, the mechanical behavior of polyurea and polyurethane materials under these high rate conditions is relatively unknown. Here, the rate-dependent stress-strain behavior of one polyurea and three representative polyurethane materials is studied by dynamic mechanical analysis, quasi-static compression testing and split Hopkinson pressure bar (SHPB) testing. The polyurethane chemistries were chosen to probe the influence of the hard segment content on the mechanical behavior, where the volume fraction and the amorphous vs. crystalline structure of the hard segment domains were varied. The large strain stress-strain behavior of polyurea and polyurethane shows strong hysteresis, cyclic softening, and strong rate-dependence. The polyurethane with a non-crystalline well-dispersed hard segment morphology did not exhibit cyclic softening. The materials are observed to transition from a rubbery-like behavior under low strain rate (similar to 10(-3) - 10(0) s(-1)) loading conditions to either a leathery or glassy-like behavior under high strain rate (-10(-3) s(-1)) loading conditions. (c) 2005 Elsevier Ltd. All rights reserved.
引用
收藏
页码:319 / 329
页数:11
相关论文
共 16 条
[1]   A systematic series of 'model' PTMO based segmented polyurethanes reinvestigated using atomic force microscopy [J].
Aneja, A ;
Wilkes, GL .
POLYMER, 2003, 44 (23) :7221-7228
[2]  
BONARD JM, 1998, EUR CHEM CHRONICLE, V1, P9
[3]   A split Hopkinson bar technique for low-impedance materials [J].
Chen, W ;
Zhang, B ;
Forrestal, MJ .
EXPERIMENTAL MECHANICS, 1999, 39 (02) :81-85
[4]   STRUCTURE AND MORPHOLOGY OF SEGMENTED POLYURETHANES .3. ELECTRON-MICROSCOPY AND SMALL-ANGLE X-RAY-SCATTERING STUDIES OF AMORPHOUS RANDOM SEGMENTED POLYURETHANES [J].
CHENTSAI, CHY ;
THOMAS, EL ;
MACKNIGHT, WJ ;
SCHNEIDER, NS .
POLYMER, 1986, 27 (05) :659-666
[5]  
DUFFY JV, 1990, ACS SYM SER, V424, P281
[6]   Finite strain behavior of poly(ethylene terephthalate) (PET) and poly(ethylene terephthalate)-glycol (PETG) [J].
Dupaix, RB ;
Boyce, MC .
POLYMER, 2005, 46 (13) :4827-4838
[7]   Microdomain morphology of poly(urethane urea) multiblock copolymers [J].
Garrett, JT ;
Siedlecki, CA ;
Runt, J .
MACROMOLECULES, 2001, 34 (20) :7066-7070
[8]  
MULLIKEN AD, IN PRESS INT J SOLID
[9]  
MULLIKEN AD, 2004, P SEM C EXP MECH
[10]   Structure-property relationships of poly(urethane urea)s with ultra-low monol content poly(propylene glycol) soft segments. I. Influence of soft segment molecular weight and hard segment content [J].
O'Sickey, MJ ;
Lawrey, BD ;
Wilkes, GL .
JOURNAL OF APPLIED POLYMER SCIENCE, 2002, 84 (02) :229-243