13 papers
Modeling the Fatigue Behavior of Amorphous Polymers
Valeriy V. Ginzburg, Oleg V. Gendelman, Alessio Zaccone
The paper derives Basquin's law for fatigue in amorphous polymers using a linearized Long plasticity model, predicts the fatigue exponent m = 3, provides an expression for the pref…
Microscopic constitutive theory of stress overshoot, yielding, and strain hardening in amorphous materials
Ankit Singh, Valeriy V. Ginzburg, Alessio Zaccone
The paper presents a microscopic constitutive model that captures the full stress–strain response of metallic and polymer glasses, including elastic behavior, stress overshoot, yie…
Geometric indicators of local plasticity in glasses measured by scanning small-beam diffraction
Amelia C. Y. Liu, Huyen Pham, Arabinda Bera +7
The notion of defects in crystalline phases of matter has been extremely powerful for understanding crystal growth, deformation and melting. Many of these discontinuities in the pe…
Atomistic Framework for Glassy Polymer Viscoelasticity Across Twenty Frequency Decades
Ankit Singh, Vinay Vaibhav, Caterina Czibula +6
Glassy polymers are central to engineering applications, yet their viscoelastic response over broad frequency and temperature ranges remains difficult to characterize. We extend no…
General Two-Parameter Model of Alpha-Relaxation in Glasses
Valeriy V. Ginzburg, Oleg Gendelman, Riccardo Casalini +1
In the vicinity of the glass transition, the characteristic relaxation time (e.g., the alpha-relaxation time in dielectric spectroscopy) of a glass-former exhibits a strongly super…
Burgers rings as topological signatures of Eshelby-like plastic events in glasses
Arabinda Bera, Ido Regev, Alessio Zaccone +1
Eshelby-like quadrupolar structures serve as the fundamental microscopic units for characterizing plastic instabilities in amorphous solids and play a crucial role in explaining th…