Rubbery response of polyurea is examined under monotonic loading in the confined compression, composite compression, and Arcan shear configurations. For polyurea prepared by a casting process, it is shown that while the bulk response is significantly nonlinear, and well fitted by the Tait equation, the shear resistance is extremely small. In contrast, polyurea formed by a spray process shows significant compressibility, inelastic volumetric deformation, and significantly enhanced shear resistance.

1.
Ma
,
Z.
, and
Ravi-Chandar
,
K.
, 2000, “
Confined Compression—A Stable Homogeneous Deformation for Multiaxial Constitutive Characterization
,”
Exp. Mech.
0014-4851,
40
, pp.
38
45
.
2.
Arcan
,
M.
,
Hashin
,
Z.
, and
Voloshin
,
A.
, 1978, “
A Method to Produce Uniform Plane-Stress States With Applications to Fiber-Reinforced Materials
,”
Exp. Mech.
0014-4851,
18
, pp.
141
146
.
3.
Liang
,
Y.-M.
and
Liechti
,
K. M.
, 1996, “
On the Large Deformation and Localization Behavior of an Epoxy Resin Under Multiaxial Stress States
,”
Int. J. Solids Struct.
0020-7683,
33
, pp.
1479
1500
.
4.
Timoshenko
,
S. P.
, and
Goodier
,
J. N.
, 1934,
Theory of Elasticity
,
McGraw-Hill
,
New York
.
5.
Qvale
,
D.
and
Ravi-Chandar
,
K.
, 2004, “
Viscoelastic Characterization of Polymers Under Multiaxial Compression
,”
Mech. Time-Depend. Mater.
1385-2000,
8
, pp.
193
214
.
6.
Park
,
S. J.
,
Liechti
,
K. M.
, and
Roy
,
S.
, 2004, “
Simplified Bulk Experiments and Hygrothermal Nonlinear Viscoelasticity
,”
Mech. Time-Depend. Mater.
1385-2000,
8
, pp.
303
344
.
7.
Ravi-Chandar
,
K.
, and
Ma
,
Z.
, 2000, “
Inelastic Deformation in Polymers Under Multiaxial Compression
,”
Mech. Time-Depend. Mater.
1385-2000,
4
, pp.
333
357
.
8.
Nemat-Nasser
,
S.
, 2005, personal communication.
This content is only available via PDF.
You do not currently have access to this content.