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Title: Advances in Additive Manufacturing and Architected Lattice Materials

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Research Org.:
Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
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Conference: Presented at: The 87th Laser Materials Processing Conference, Tokyo, Japan, Apr 03 - Apr 07, 2017
Country of Publication:
United States

Citation Formats

Spadaccini, C, Matthews, M, and Shusteff, M. Advances in Additive Manufacturing and Architected Lattice Materials. United States: N. p., 2017. Web.
Spadaccini, C, Matthews, M, & Shusteff, M. Advances in Additive Manufacturing and Architected Lattice Materials. United States.
Spadaccini, C, Matthews, M, and Shusteff, M. 2017. "Advances in Additive Manufacturing and Architected Lattice Materials". United States. doi:.
title = {Advances in Additive Manufacturing and Architected Lattice Materials},
author = {Spadaccini, C and Matthews, M and Shusteff, M},
abstractNote = {},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = 2017,
month = 6

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  • In this paper, a two-step homogenization method is proposed and implemented for evaluating effective mechanical properties of lattice structured material fabricated by the material extrusion additive manufacturing process. In order to consider the characteristics of the additive manufacturing process in estimation procedures, the levels of scale for homogenization are divided into three stages the levels of layer deposition, structural element, and lattice structure. The method consists of two transformations among stages. In the first step, the transformation between layer deposition and structural element levels is proposed to find the geometrical and material effective properties of structural elements in the latticemore » structure. In the second step, the method to estimate effective mechanical properties of lattice material is presented, which uses a unit cell and is based on the discretized homogenization method for periodic structure. The method is implemented for cubic lattice structure and compared to experimental results for validation purposes.« less
  • Abstract not provided.
  • Additive manufacturing (AM) techniques may lead to improvements in many areas of radiation detector construction; notably the rapid manufacturing time allows for a reduced time between prototype iterations. The additive nature of the technique results in a granular microstructure which may be permeable to ingress by atmospheric gases and make it unsuitable for gaseous radiation detector development. In this study we consider the application of AM to the construction of enclosures and frames for wire-based gaseous radiation tracking detectors. We have focussed on oxygen impurity ingress as a measure of the permeability of the enclosure, and the gas charging andmore » discharging curves of several simplistic enclosure shapes are reported. A prototype wire-frame is also presented to examine structural strength and positional accuracy of an AM produced frame. We lastly discuss the implications of this study for AM based radiation detection technology as a diagnostic tool for incident response scenarios, such as the interrogation of a suspect radiation-emitting package. (authors)« less