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Impact Tests for Woods

Description: Although it is well known that the strength of wood depends greatly upon the time the wood is under the load, little consideration has been given to this fact in testing materials for airplanes. Here, results are given of impact tests on clear, straight grained spruce. Transverse tests were conducted for comparison. Both Izod and Charpy impact tests were conducted. Results are given primarily in tabular and graphical form.
Date: February 1922
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Drop Tests of 325 Pound 6M Specification Packages

Description: Testing of 6M specification packages, performed in response to concerns over the integrity of the clamp-ring closure, showed that the clamp-ring was unable to retain the top in thirty foot drop tests of packages having the maximum allowed weight (290 kg or 640 lb). To determine if the clamp-ring closure was adequate for packages with lower contents weight, a series of tests were performed on packages weighing 147 kg (325 lb) at a range of impact angles. The results showed that the standard clam… more
Date: April 30, 2004
Creator: SMITH, AC
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Micromechanics of spall and damage in tantalum

Description: The authors conducted a series of plate impact experiments using an 80-mm launcher to study dynamic void initiation, linkup, and spall in tantalum. The tests ranged in peak shock pressures so that the effect of peak pressure on the transition from void initiation, incipient spall, and full spall could be studied. Wave profiles were measured using a velocity interferometry system (VISAR), and targets were recovered using {open_quotes}soft{close_quotes} recovery techniques. The authors utilized s… more
Date: May 1, 1996
Creator: Zurek, A.K.; Thissell, W.R.; Johnson, J.N.; Tonks, D.L. & Hixson, R.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Spall Strength Measurements of Concrete for Varying Aggregate Sizes

Description: Controlled impact experiments have been performed to determine the spall strength of four different concrete compositions. The four concrete compositions are identified as, `SAC-5, CSPC', ("3/4") large, and ("3/8") small, Aggregate. They differ primarily in aggregate size but with average densities varying by less than five percent. Wave profiles from sixteen experiments, with shock amplitudes of 0.07 to 0.55 GPa, concentrate primarily within the elastic regime. Free-surface particle velocity m… more
Date: May 5, 1999
Creator: Chhabildas, Lalit C.; Kipp, Marlin E.; Reinhart, William D. & Wilson, Leonard T.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Drop Tests for the 6M Specification Package Closure Investigation

Description: Results of tests of drum-type RAM packages employing conventional clamp-ring closures have caused concern over the DOT 6M Specification Package. To clarify these issues, a series of tests were performed to determine the response of the clamp-ring closure to the regulatory Hypothetical Accident Condition (9m) drop tests, for packages at maximum allowable weight. Three enhanced closure designs were also tested: the Clamshell, plywood disk reinforcement, and J-Clip. The results of the tests showed… more
Date: April 30, 2004
Creator: SMITH, AC
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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FAA debris mitigation phase I impact test report

Description: The goal of the study is the accurate prediction of the effect of uncontained engine debris on aircraft structures. This will provide airframe engineers the information required to design for damage mitigation and improved safety. The basis for predictive simulation tools lies in the experimental data, which motivates the initial development and application of codes that can adequately describe past experiments. This in turn validates the predictive capability of the codes to simulate future ex… more
Date: March 8, 1999
Creator: Couch, R
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

DropTests of 325 Pound 6M Packages

Description: There are many factors which affect the performance of a drum closure during drop tests. Important test conditions are: weight of package, height of drop, and angle of impact. Structural characteristics of the package determine its ability to withstand the test conditions imposed. These characteristics include: package diameter, shell material and thickness, strength of internal fill material (e.g., fiberboard), and configuration of closure (clamp-ring, bolted flange, etc.). For the clamp-ring … more
Date: January 30, 2004
Creator: Gelder, L. A.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Evaluation of impact tests of solid steel billet onto concrete pads, and application to generic ISFSI storage cask for tipover and side drop

Description: Twelve tests were performed at LLNL to assess loading conditions on a spent fuel casts for side drops, end drops and tipover events. The tests were performed with a 1/3-scale model concrete pad to benchmark the structural analysis code DYNA3D. The side drop and tipover test results are discussed in this report. The billet and test pad were modified with DYNA3D using material properties and techniques used in earlier tests. The peak or maximum deceleration test results were compared to the simul… more
Date: May 1, 1997
Creator: Witte, M.C.; Chen, T.F.; Murty, S.S.; Tang, D.T.; Mok, G.C.; Fischer, L.E. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Equation of State Measurements of Materials Using a Three-Stage Gun to Impact Velocities of 11km/s

Description: Understanding high pressure behavior of homogeneous as well as heterogeneous materials is necessary in order to address the physical processes associated with hypervelocity impact events related to space science applications including orbital debris impact and impact lethality. At very high impact velocities, material properties will be subjugated to phase-changes, such as melting and vaporization. These phase states cannot be obtained through conventional gun technology. These processes need t… more
Date: September 26, 2000
Creator: Reinhart, William D.; Chhabildas, Lalit C.; Carroll, Daniel E.; Thornhill, T. G. & Winfree, N. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Drop Tests of the Closure Ring for the 9975 Package

Description: The drop tests of the closure ring for 9975 packages, described here, were performed to answer questions raised by the regulatory authority as a result of deformation of the closure ring and drum rim observed during drop tests conducted in September 1998.
Date: September 29, 1999
Creator: Smith, A. C.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Hyperveolcity impacts on aluminum from 6 to 11 km/s for hydrocode benchmarking.

Description: A systematic computational and experimental study is presented on impact generated debris resulting from record-high impact speeds recently achieved on the Sandia three-stage light-gas gun. In these experiments, a target plate of aluminum is impacted by a titanium-alloy flyer plate at speeds ranging from 6.5 to 11 km/s, producing pressures from 1 Mb to over 2.3 Mb, and temperatures as high as 15000 K (>1 eV). The aluminum plate is totally melted at stresses above 1.6 Mb. Upon release, the th… more
Date: April 1, 2003
Creator: Saul, W. Venner; Reinhart, William Dodd; Thornhill, Tom Finley, III; Lawrence, Raymond Jeffery, Jr.; Chhabildas, Lalit Chandra; Bessette, Gregory Carl et al.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Experimental Bench Mark Data for ALEGRA Code Validations

Description: In this study experiments of increasing complexity have been conducted to provide a data base for validating features of the Arbitrary Lagrangian Eulerian Grid for Research Applications (ALEGRA) code over a broad range of strain rates with overlapping diagnostics that encompass multiple responses. This range encompasses strain rates characteristic of shock-wave propagation (10<sup>7</sup>/s) and those chameteristics of structural response (10<sup>2</sup>/s). The tests matrix consists of two exp… more
Date: June 23, 1999
Creator: Chhabildas, L. C.; Kipp, M. E.; Konrad, C. H.; Mann, G. A.; Mosher, D. A.; Peery, J. S. et al.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Numerical simulations of glass impacts using smooth particle hydrodynamics

Description: As part of a program to develop advanced hydrocode design tools, we have implemented a brittle fracture model for glass into the SPHINX smooth particle hydrodynamics code. We have evaluated this model and the code by predicting data from one-dimensional flyer plate impacts into glass. Since fractured glass properties, which are needed in the model, are not available, we did sensitivity studies of these properties, as well as sensitivity studies to determine the number of particles needed in the… more
Date: July 1, 1995
Creator: Mandell, D. A. & Wingate, C. A.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Final Report: Drop Testing of Aged Stems on the SP981 Reservoir

Description: Free fall drop testing of unloaded SP981 reservoirs was conducted by Savannah River Technology Center in the Materials Test Facility. The testing consisted of dropping eight aged and two unaged reservoirs on their stems at impact angles of 88 degrees and 70 degrees from heights of approximately 4 and 6 foot above a hardened steel surface.
Date: August 11, 1999
Creator: White, M.B.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Segmented Aluminum Honeycomb Characteristics in T-Direction, Dynamic Crush Environments

Description: Thirteen segmented aluminum honeycomb samples (5 in. diameter and 1.5 in. height) have been crushed in an experimental configuration that uses a drop table impact machine. The 38.0 pcf bulk density samples are a unique segmented geometry that allows the samples to be crushed while maintaining a constant cross-sectional area. A crush weight of 175 lb was used to determine the rate sensitivity of the honeycomb's highest strength orientation, T-direction, in a dynamic environment of {approx}50 fps… more
Date: August 23, 2000
Creator: Bateman, Vesta I.; Brown, Frederick A.; Nusser, Michael A. & Swanson, Lloyd H.
Item Type: Refine your search to only Report
Partner: UNT Libraries Government Documents Department
open access

Elastic shock response and spall strength of concrete

Description: Impact experiments have been performed to obtain shock compression, release response, and spall strength of two scaled concrete formulations. Wave profiles from a suite of ten experiments, with shock amplitudes of 0.08 to 0.55 GPa, focus primarily on the elastic regime. Despite considerable wave structure that develops at the shock transits these heterogeneous targets, consistent pullback signals were identified in the release profiles, indicating a spall strength of about 30 MPa. Explicit mode… more
Date: August 1, 1997
Creator: Kipp, Marlin E.; Chhabildas, Lalit C. & Reinhart, William D.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

A study of the effect of grain size on the ballistic performance of silicon carbide

Description: The depth of penetration method was used to ballistically evaluate the performance of silicon carbide as a function of grain size. The hot-pressed silicon carbide was backed by 4340 steel Rc = 35 and impacted by tungsten heavy metal projectiles of L/D = 4 at velocities of 1.6 and 1/75 km/s. The hot-pressed silicon carbide was also compared with reaction-sintered silicon carbide of identical thickness in the current study. Results are compared with data previously reported by others.
Date: March 1, 1995
Creator: Cline, C. F.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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Experimental measurements of shock properties of stishovite

Description: We have synthesized, characterized and performed Hugoniot measurements on monolithic samples of stishovite, a high pressure polymorph of silica. Synthesis was accomplished in a multianvil press with pyrophyllite gaskets and carbon heaters. The samples had densities ranging from 3.80 to 4.07, corresponding to stishovite volume fractions of 0.7 to 0.87, a range confirmed by NMR analysis. They had no significant impurities except less than 1% carbon. Samples {approximately} 1 mm thick and 3 mm dia… more
Date: October 1, 1995
Creator: Furnish, M. D. & Ito, E.
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
open access

Low amplitude impact testing and analysis of pristine and aged solid high explosives

Description: The critical impact velocities of 60.1 mm diameter blunt steel projectiles required for ignition of exothermic chemical reaction were determined for heavily confined charges of new and aged (15-30 years) solid HMX-based high explosives. The explosives in order of decreasing impact sensitivity were: PBX 9404; LX-lo; LX-14; PBX 9501; and LX-04. Embedded pressure gauges measured the interior pressure histories. Stockpile aged LX-04 and PBX 9501 from dismantled units were tested and compared to fre… more
Date: August 17, 1998
Creator: Chidester, S K; Garza, R & Tarver, C M
Item Type: Refine your search to only Article
Partner: UNT Libraries Government Documents Department
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