2025-04-09 09:00:00
Tamrakar et al. conducted strain rate-dependent experiments in which a microdroplet of epoxy resin was bonded to a single glass fiber and then that bond was broken by mode II shear loading [1]. With that data, Tamrakar et al. used finite element modeling to…
In continuum damage models involving strain softening, various Quantities of Interest (QoIs) such as energy dissipation are pathologically dependent on the discretization resolution (i.e. mesh size). For finite element methods, this is referred to as the mesh size sensitivity, implying lack of regularization. The…
Intergranular and transgranular fracture play a critical role in determining the fracture behavior and toughness of polycrystalline materials, such as metals and ceramics. These mechanisms are strongly governed by microstructural features, including grain size, grain shape, crystallographic orientations, and grain boundary properties. We present…
A 17 µm diameter UHMWPE fiber consists of over 100,000 fibrils with diameters ranging from 10 to 100 nm. These fibrils can exhibit various relative rotations around the axial direction, forming interphases between distinct crystal planes. Fiber failure often occurs through defibrillation, determined by…
The multi-axial damage behavior of brittle polymers is highly complex, involving a stark tension-compression asymmetry and strong pressure sensitivity. These aspects are challenging to predict via phenomenological tensor based damage models. Recognizing that these behaviors stem from various micro-scale damage mechanisms, this work presents…
