Elasticity and plasticity in stiff and flexible oligomeric glasses.
In this paper we focus on the mechanical properties of oligomeric glasses (waxes), employing a microscopic model that provides, via numerical simulations, information about the shear modulus of such materials, the failure mechanism via plastic instabilities, and the geometric responses of the oligomers themselves to a mechanical load. We present a microscopic theory that explains the numerically observed phenomena, including an exact theory of the shear modulus and of the plastic instabilities, both local and system spanning. In addition we present a model to explain the geometric changes in the oligomeric chains under increasing strains.
Faculty of Mechanical Engineering, Technion - Israel Institute of Technology, Haifa, Israel.
Oleg
O
Gendelman
Department of Physics, Emory University, Atlanta, Georgia, USA.
H George E
HG
Hentschel
Department of Chemical Physics, Weizmann Institute of Science, Rehovot 76100, Israel.
Pankaj K
PK
Mishra
Department of Chemical Physics, Weizmann Institute of Science, Rehovot 76100, Israel.
Itamar
I
Procaccia
Department of Chemical Physics, Weizmann Institute of Science, Rehovot 76100, Israel.
Jacques
J
Zylberg