Finite Element Simulations to Explore Assumptions in Kolsky Bar Experiments.

Crum, Justin

doi:10.2172/1213306

Title: Finite Element Simulations to Explore Assumptions in Kolsky Bar Experiments.

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Abstract

The chief purpose of this project has been to develop a set of finite element models that attempt to explore some of the assumptions in the experimental set-up and data reduction of the Kolsky bar experiment. In brief, the Kolsky bar, sometimes referred to as the split Hopkinson pressure bar, is an experimental apparatus used to study the mechanical properties of materials at high strain rates. Kolsky bars can be constructed to conduct experiments in tension or compression, both of which are studied in this paper. The basic operation of the tension Kolsky bar is as follows: compressed air is inserted into the barrel that contains the striker; the striker accelerates towards the left and strikes the left end of the barrel producing a tensile stress wave that propogates first through the barrel and then down the incident bar, into the specimen, and finally the transmission bar. In the compression case, the striker instead travels to the right and impacts the incident bar directly. As the stress wave travels through an interface (e.g., the incident bar to specimen connection), a portion of the pulse is transmitted and the rest reflected. The incident pulse, as well as the transmitted and reflectedmore »« less

Authors:

Crum, Justin ^[1]

Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Publication Date:: Wed Aug 05 00:00:00 EDT 2015

Research Org.:: Sandia National Lab. (SNL-NM), Albuquerque, NM (United States)

Sponsoring Org.:: USDOE National Nuclear Security Administration (NNSA)

OSTI Identifier:: 1213306

Report Number(s):: SAND-2015-7148R
603199

DOE Contract Number:: AC04-94AL85000

Resource Type:: Technical Report

Country of Publication:: United States

Language:: English

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                    Crum, Justin. Finite Element Simulations to Explore Assumptions in Kolsky Bar Experiments..  United States: N. p., 2015. 
        Web.  doi:10.2172/1213306.

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                    Crum, Justin. Finite Element Simulations to Explore Assumptions in Kolsky Bar Experiments..  United States.  https://doi.org/10.2172/1213306

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                    Crum, Justin. 2015.  
        "Finite Element Simulations to Explore Assumptions in Kolsky Bar Experiments.".  United States.  https://doi.org/10.2172/1213306.  https://www.osti.gov/servlets/purl/1213306.

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@article{osti_1213306,

  title        = {Finite Element Simulations to Explore Assumptions in Kolsky Bar Experiments.},

  author       = {Crum, Justin},

  abstractNote = {The chief purpose of this project has been to develop a set of finite element models that attempt to explore some of the assumptions in the experimental set-up and data reduction of the Kolsky bar experiment. In brief, the Kolsky bar, sometimes referred to as the split Hopkinson pressure bar, is an experimental apparatus used to study the mechanical properties of materials at high strain rates. Kolsky bars can be constructed to conduct experiments in tension or compression, both of which are studied in this paper. The basic operation of the tension Kolsky bar is as follows: compressed air is inserted into the barrel that contains the striker; the striker accelerates towards the left and strikes the left end of the barrel producing a tensile stress wave that propogates first through the barrel and then down the incident bar, into the specimen, and finally the transmission bar. In the compression case, the striker instead travels to the right and impacts the incident bar directly. As the stress wave travels through an interface (e.g., the incident bar to specimen connection), a portion of the pulse is transmitted and the rest reflected. The incident pulse, as well as the transmitted and reflected pulses are picked up by two strain gauges installed on the incident and transmitted bars as shown. By interpreting the data acquired by these strain gauges, the stress/strain behavior of the specimen can be determined.},

  doi          = {10.2172/1213306},

  url          = {https://www.osti.gov/biblio/1213306},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Wed Aug 05 00:00:00 EDT 2015},

  month        = {Wed Aug 05 00:00:00 EDT 2015}

}

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