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Chapter and Conference Paper
High Strain Rate Compressive Behavior of 3D Printed Liquid Crystal Elastomers
Polymers are widely used as dam** materials in vibration and impact applications. Liquid crystal elastomers (LCEs) are a unique class of polymers that may offer the potential for enhanced energy absorption c...
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Chapter and Conference Paper
Mechanical Characterization of 304L-VAR Stainless Steel in Tension with a Full Coverage from Low, Intermediate, to High Strain Rates
A 304L-VAR stainless steel was mechanically characterized in tension over a full range of strain rates from low, intermediate, to high using a variety of apparatus. While low- and high-strain-rate tests were c...
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Chapter and Conference Paper
Dynamic Tensile Behavior of Soft Ferromagnetic Alloy Fe-Co-2V
Fe-Co-2V is a soft ferromagnetic alloy used in electromagnetic applications due to excellent magnetic properties. However, the discontinuous yielding (Luders bands), grain-size-dependent properties (Hall-Petch...
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Article
Experimental Measurement and Analysis of Stress/Shock Wave Propagation Speed through Pre-strained Silicone Foam Pads under Lateral Confinement
Foam materials are extensively utilized in aerospace, military, and transportation applications to mitigate blast or shock impact. When foam materials are subjected to an external high-speed impact, shock, or ...
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Article
Energy Dissipation Characteristics in Pre-strained Silicone Foam Transitioning to Silicone Rubber
Silicone foam is used as a shock mitigation material in a variety of systems to protect internal components from being damaged during external shock or impact loading. Characterizing the shock mitigation respo...
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Chapter and Conference Paper
Development of “Dropkinson” Bar for Intermediate Strain-Rate Testing
A new apparatus – “Dropkinson Bar” – has been successfully developed for material property characterization at intermediate strain rates. This Dropkinson bar combines a drop table and a Hopkinson bar. The drop...
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Chapter and Conference Paper
Revisit of Dynamic Brazilian Tests of Geomaterials
Understanding the dynamic behavior of geomaterials is critical for refining modeling and simulation of applications that involve impacts or explosions. Obtaining material properties of geomaterials is challeng...
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Chapter and Conference Paper
Radial Inertia Effect on Dynamic Compressive Response of Polymeric Foam Materials
Polymeric foams have been extensively used in shock isolation applications because of their superior shock or impact energy absorption capability. In order to meet the shock isolation requirements, the polymer...
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Chapter and Conference Paper
Quasi-Static and Dynamic Poisson’s Ratio Evolution of Hyperelastic Foams
Poisson’s ratio of soft, hyperelastic foam materials such as silicone foam is typically assumed to be both a constant and a small number near zero. However, when the silicone foam is subjected to large deforma...
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Chapter and Conference Paper
Effect of Pre-strain, Processing Conditions, and Impact Velocity on Energy Dissipation in Silicone Foams and Rubber
Silicone foams and rubber are used in a variety of applications to protect internal components from external shock impact. Understanding how these materials mitigate impact energy is a crucial step in designin...
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Chapter and Conference Paper
Dynamic Fracture Response of a Synthetic Cortical Bone Simulant
This work characterizes the fracture response of a composite material designed to mimic the response of human cortical bone. We have identified additive manufacturing, more generally known as 3-D printing, as ...
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Article
Pre-strain Effect on Frequency-Based Impact Energy Dissipation through a Silicone Foam Pad for Shock Mitigation
Silicone foams have been used in a variety of applications from gaskets to cushioning pads over a wide range of environments. Particularly, silicone foams are used as a shock mitigation material for shock and ...
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Article
Orientation Dependent Compressive Response of Human Femoral Cortical Bone as a Function of Strain Rate
Under extreme environments, such as a blast or impact event, the human body is subjected to high-rate loading, which can result in damage such as torn tissues and broken bones. The ability to numerically simu...
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Article
Rate-dependent fracture modes in human femoral cortical bone
An accurate understanding of fracture in human bone under complex loading scenarios is critical to predicting fracture risk. Cortical bone, or dense compact bone, is subject to complex loading due to the inher...
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Article
Tensile Properties of Dyneema SK76 Single Fibers at Multiple Loading Rates Using a Direct Grip** Method
Ultrahigh molecular weight polyethylene (UHMWPE) fibers such as Dyneema and Spectra are seeing more use in lightweight armor applications due to higher tensile strength and lower density compared to aramid fi...
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Chapter and Conference Paper
Effect of Strain Rate and Pre-twist on Strength of Single Kevlar® KM2 Fiber
High performance fibers such as Kevlar KM2 used in protective vests are loaded primarily in tension at high loading rates. During the weaving and crim** process of fibers/yarns to make fabrics, individual fi...
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Chapter and Conference Paper
Initiation Fracture Toughness of Human Cortical Bone as a Function of Loading Rate
During injury causing events such as impact, blunt trauma, penetration or blast, the human body is subjected to high rate loading. These events will deform and damage human tissue, frequently causing tearing i...
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Chapter and Conference Paper
Inertia Effects in High-Rate Compression Experiments of Soft Materials
Inertia effects in Kolsky compression bar experiments have long been studied ever since the establishment of this high-rate characterization technique. As the materials under investigation become softer, new u...
