Stress wave propagation and force transmission in polymeric closed cell foams subjected to air shock loading

Article Engineering, Mechanical

Fast stress wave attenuation in bioinspired composites with distributed soft particles modulating hard matrices

Yingyang Yu et al.

Summary: The paper investigates the performance of bioinspired composites with distributed soft particles in attenuating stress waves. The composites not only absorb more impact energy, but also efficiently delay and attenuate the impact-induced stress wave. This simultaneous improvement of impact-resistant performance in a single material design is highly desirable in many industries.

EXTREME MECHANICS LETTERS (2023)

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Article Engineering, Mechanical

Advances in naval composite and sandwich structures for blast and implosion mitigations

Piyush Wanchoo et al.

Summary: This article explores the behavior and response of naval sandwich structures in extreme environments, including air shock, underwater shock, and implosion. It points out existing research gaps and proposes various technologies to improve blast and implosion mitigation of sandwich structures.

JOURNAL OF SANDWICH STRUCTURES & MATERIALS (2022)

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Article Engineering, Civil

Optimization of blast mitigating sandwich structures with fiber-reinforced face sheets and PVC foam layers as core

B. Alanbay et al.

Summary: In this study, a surrogate optimization algorithm and numerical technique were used to analyze the dynamic deformations of sandwich structures with fiber-reinforced face sheets. The goal was to minimize the structural mass and maximize its blast mitigating capabilities. Simulation results showed that the mass density and elastic modulus of the core layers did not continuously vary through the thickness.

THIN-WALLED STRUCTURES (2022)

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Article Engineering, Multidisciplinary

Hydrostatic high strain rate loading response of closed-cell polymeric foams as a function of mass density

Piyush Wanchoo et al.

Summary: This study investigates the hydrostatic elastic response and yield behavior of PVC foams under high strain rate hydrostatic loading conditions. A novel underwater high strain rate loading facility is used, and 3-D Digital Image Correlation (DIC) technique and ultra-high-speed photography are employed to obtain full-field volumetric deformation data. The foam materials show an increase in bulk modulus and yield strength under high strain rate loading, with the increment being highly sensitive to the material bulk mass density.

COMPOSITES PART B-ENGINEERING (2022)

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Review Mechanics

Investigations on air and underwater blast mitigation in polymeric composite structures ? A review

Piyush Wanchoo et al.

Summary: Polymer-based sandwich composites are increasingly used in the marine industry and face the risk of encountering high-intensity underwater or in-air explosive loading. This review discusses achieving blast mitigation with polymeric composites and highlights the differences in loading mechanisms between AIREX and UNDEX. Understanding these mechanisms facilitates tailored design approaches for blast mitigation, with recent research on composite sandwich architecture and other foam metamaterial constructions also addressed.

COMPOSITE STRUCTURES (2021)

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Article Mechanics