Shock response spectrum
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Shock compression response of high entropy alloys Open
In this work, we studied the shock response of two typical equiatomic high entropy alloys (HEAs) (i.e. FCC-structured CrMnFeCoNi alloy and BCC-structured NiCoFeCrAl alloy). The experimental results show that these two HEAs exhibit a relati…
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Multiscale modeling of shock wave localization in porous energetic material Open
Shock wave interactions with defects, such as pores, are known to play a key\nrole in the chemical initiation of energetic materials. The shock response of\nhexanitrostilbene is studied through a combination of large scale reactive\nmolecu…
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Molecular dynamics simulation of the shock response of materials: A tutorial Open
The aim of this Tutorial is to help new researchers understand how to perform molecular dynamics (MD) simulations of the shock response of materials and to provide a brief discussion of how MD can provide important insights into issues in …
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A zero-power sensing MEMS shock sensor with a latch-reset mechanism for multi-threshold events monitoring Open
This paper presents the design, modeling, fabrication, and testing of a MEMS passive shock sensor to record multiple threshold events with robust latching mechanism using mass-spring assembly. The latching part on a seismic mass enables th…
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On the Shock Response of Polymers to Extreme Loading Open
This paper reviews polymer response to shock and discusses how plastics behave differently depending on the strain rate applied. The author uses polyethylene, polytetrafluroethylene, polycarbonate and epoxy as example materials. It is sugg…
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Structural response of α-quartz under plate-impact shock compression Open
Gas-gun shock compression and pulsed x-ray diffraction reveal new details of the crystal structure of SiO 2 under shock loading.
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Shock Response Spectrum Primer. Open
distorted transient data being recorded for analysis with resultant error in the computed shock spectra. Design guidelines are provided to preclude these errors from occurring.
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Ultrafast dynamic response of single-crystal <i>β</i>-HMX (octahydro-1,3,5,7-tetranitro-1,3,5,7-tetrazocine) Open
We report experimental and computational studies of shock wave dynamics in single-crystal β-HMX on an ultrafast time scale. Here, a laser-based compression drive (∼1 ns in duration; stresses of up to ∼40 GPa) is used to propagate shock wav…
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Influence of defects on the shock Hugoniot of tantalum Open
Using molecular dynamics simulations, we investigate the effect of vacancies and dislocations on the dynamic response of single crystal tantalum to shock loading along the ⟨110⟩ axis. A Hugoniostat technique is employed, for which a series…
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Shock compression/release of magnesium single crystals along a low-symmetry orientation: Role of basal slip Open
To gain insights into the relative contributions of different plastic deformation mechanisms, particularly basal slip, for shocked hexagonal close-packed (hcp) metals, magnesium (Mg) single crystals were subjected to shock compression and …
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A Study of the Shock Sensitivity of Energetic Single Crystals by Large-Scale Ab Initio Molecular Dynamics Simulations Open
Understanding the reaction initiation of energetic single crystals under external stimuli is a long-term challenge in the field of high energy density materials. Herewith, we developed an ab initio molecular dynamics method based on the mu…
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Neurofilaments Function as Shock Absorbers: Compression Response Arising from Disordered Proteins Open
What can cells gain by using disordered, rather than folded, proteins in the architecture of their skeleton? Disordered proteins take multiple coexisting conformations, and often contain segments which act as random-walk-shaped polymers. U…
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Blast-Induced Compression of a Thin-Walled Aluminum Honeycomb Structure—Experiment and Modeling Open
The presented discussion concerns the behavior of a thin-walled hexagonal aluminum honeycomb structure subjected to blast loading. The shock wave affecting the structure is generated by detonation of the C4 charge in an explosive-driven sh…
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Experimental characterisation of dry friction isolators for shock and vibration Open
Shock and vibration are a source of failures in harsh environments such as military, naval and aerospace applications; thus, the use of vibration isolators is extended. Cable isolators are known for their high-energy storage and dissipatio…
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Ultrafast shock compression of PDMS‐based polymers Open
The shock response of polymers is important for a number of commercial and defense‐related applications, but it is difficult to obtain empirical shock response data over the wide range of preparations and aging conditions typically found i…
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Dynamic response study of Ti<sub>3</sub>C<sub>2</sub>-MXene films to shockwave and impact forces Open
Ti3C2-MXenes films are subjected to dynamic phenomena of low and high-velocity impact resulting in fast response times with piezoresistivity behavior.
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The Dynamic Impact Response of 3D-Printed Polymeric Sandwich Structures with Lattice Cores: Numerical and Experimental Investigation Open
This paper proposes a dynamic drop weight impact simulation to predict the impact response of 3D printed polymeric sandwich structures using an explicit finite element (FE) approach. The lattice cores of sandwich structures were based on t…
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Shock response of condensed-phase RDX: molecular dynamics simulations in conjunction with the MSST method Open
We have performed molecular dynamics simulations in conjunction with the multiscale shock technique (MSST) to study the initial chemical processes of condensed-phase RDX under various shock velocities (8 km s−1, 10 km s−1 and 11 km s−1).
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Two-dimensional mesoscale simulations of shock response of dry sand Open
Simulations were done to gain insight whether the shock response of dry sand at low stresses would vary with porosity and whether the effects of friction between grains under confinement could be extracted from the planar plate impact expe…
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High-speed x-ray phase contrast imaging and digital image correlation analysis of microscale shock response of an additively manufactured energetic material simulant Open
The performance of energetic materials subjected to dynamic loading significantly depends on their micro- and meso-scale structural morphology. The geometric versatility offered by additive manufacturing opens new pathways to tailor the pe…
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Response Spectrum Analysis of Printed Circuit Boards Subjected to Shock Loads Open
A spacecraft consists of a number of electronic packages to meet the functional requirements. An electronic package is generally an assembly of printed circuit boards placed in a mechanical housing. A number of electronic components are mo…
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Damping effects of different shock absorbing materials for tunnel under seismic loadings Open
Circular tunnels are widely used in infrastructure. Under the action of earthquakes, the destruction of circular tunnels will result in a large number of economic losses and casualties. Therefore, the study on shock absorption of tunnels i…
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Atomistic study of shock Hugoniot of single crystal Mg Open
Molecular Dynamics (MD) simulations are carried out to investigate the shock Hugoniot for single crystal Mg using a planar shock. The MD simulations were carried out using two embedded atom method (EAM) potentials for impact velocities in …
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Shock compression response of diamond single crystals at multimegabar stresses Open
Shock compressed diamond response at multi-megabar stresses – of fundamental interest to high pressure science and relevant for high energy density experiments related to inertial confinement fusion – is often assumed to be hydrodynamic. T…
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Adjustable shock absorber characteristics testing and modelling Open
The paper shortly presents the design of an electromagnetically adjustable shock absorber and its damping characteristics obtained from manufacturers. Next part presents the methodology and test stands typically used for shock absorber tes…
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Shock compression response of additively manufactured AlSi10Mg Open
We measured the Hugoniot, Hugoniot elastic limit (HEL), and spallation strength of laser powder bed fusion (LPBF) AlSi10Mg via uniaxial plate-impact experiments to stresses greater than 13 GPa. Despite its complex anisotropic microstructur…
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The Spherical Shock Factor Theory of a FSP with an Underwater Added Structure Open
A floating shock platform (FSP) is important experimental equipment for the antishock assessment of large‐scale shipborne equipment. Generally speaking, the FSP is a square barge structure with a flat bottom. In order to satisfy the key in…
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Simulator of pyroshock environment and effect rules of its adjustable parameters Open
During the launching of spacecraft, the on-board devices will undergo a series of pyroshock environments. In order to verify the reliability of these devices under these pyroshock environments, all of them are needed to take the shock test…
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Pyroshock Acceleration Field Reconstruction in Temporal and Spectral Domains Based on Laser Shock Scanning and Iterative Decomposition and Synthesis Considering Stop Band Effects Open
Pyrotechnic devices are used to separate substructures from main structures. Pyroshock can cause failure in electronic components that are sensitive to high frequency shock. Most of the existing methods to analyze pyroshock have limitation…
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Analysis of seismically‐isolated two‐block systems using a multi–rocking‐body dynamic model Open
A novel multibody rocking model is developed to investigate the dynamic response of two stacked rigid blocks placed on a linear base isolation device. The model is used to investigate the dynamic response of a realistic statue‐pedestal sys…