2025-04-09 09:00:00
Shock compression of granular materials features prominently in manufacturing, defense, and planetary sciences. A significant amount of the total energy used to shock-compress powders is consumed in plasticity-induced pore collapse (Meyers 1999) followed by deformation of the grains. In this work, X-ray phase contrast…
In this study, the blast response of hybrid-fibre engineered cementitious composite (HFECC) panels is experimentally and numerically evaluated. For blast testing, HFECC and normal reinforced concrete (NRC) panels were tested under contact explosions generated by Plastic Explosive 4 (PE4) on a demolition range. The…
Particle arrangement plays a crucial role in determining the behavior of granular materials, influencing stress distribution and particle movement within the system. Despite the significance of considering particle arrangements, their impact on granular materials under shock compaction remains inadequately explored. To investigate the influence…
Ultralight mechanical metamaterials enabled by advanced manufacturing processes have previously achieved density-normalized strength and stiffness properties that are inaccessible to bulk materials, but the majority of this work has focused on static loading while the mechanical properties of these metamaterials under dynamic loading conditions…
Recent advances in additive manufacturing have facilitated the design of novel architected materials that exploit control over material mesostructure, to outperform typical cellular solids and produce effective properties, including stiffness and strength, that often reach theoretical upper bounds. However, the corresponding gains at high-loading…
Cellular solids are widely observed in many natural systems such as bones, honeycombs, and shells due to their strength-to-weight ratio and energy absorption benefits. Taking inspiration from these natural systems, additive manufacturing (AM) has opened the design space for architected lattices that can be…
Minimally invasive endovascular therapy (MIET) revolutionizes vascular disease treatment through percutaneous access and transcatheter implantation of medical devices. Conventional devices encounter challenges such as incomplete treatment, leading to issues like recanalization in brain aneurysms, endoleaks in aortic aneurysms, and paravalvular leaks in cardiac valves….
Bistable mechanisms maintain two stable positions without consuming energy, making them useful in applications demanding long-term stability. Here, we introduce a novel rotational bistable mechanism designed specifically for airfoil leading and trailing edges morphing in Unmanned Aerial Vehicles (UAVs). The proposed mechanism addresses the…
Materials with different combinations of piezoelectric and flexoelectric properties offer multifunctionality and versatility in terms of modes of operation in sensing, actuation, energy conversion, and energy harvesting. We explore a microscopic mechanism for tailoring the macroscopic electrical output of polymer-metal particle composites, which takes…
We use the material point methods to overcome many difficulties related to numerical simulation of objects with complex geometries subjected to extreme deformations and stresses. These issues include complex geometries of 3-D printed materials, mesh or material point generation from CT- scanned images, and…
