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Title: A Flexure-Based Mechanism for Precision Adjustment of National Ignition Facility Target Shrouds in Three Rotational Degrees of Freedom

Journal Article · · Fusion Science and Technology
DOI:https://doi.org/10.13182/FST15-217· OSTI ID:1343009
 [1];  [1];  [2];  [2]
  1. General Atomics, San Diego, CA (United States)
  2. Lawrence Livermore National Lab. (LLNL), Livermore, CA (United States)
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This study presents the design of a flexure-based mount allowing adjustment in three rotational degrees of freedom (DOFs) through high-precision set-screw actuators. The requirements of the application called for small but controlled angular adjustments for mounting a cantilevered beam. The proposed design is based on an array of parallel beams to provide sufficiently high stiffness in the translational directions while allowing angular adjustment through the actuators. A simplified physical model in combination with standard beam theory was applied to estimate the deflection profile and maximum stresses in the beams. A finite element model was built to calculate the stresses and beam profiles for scenarios in which the flexure is simultaneously actuated in more than one DOF.

Research Organization:
Lawrence Livermore National Laboratory (LLNL), Livermore, CA (United States)
Sponsoring Organization:
USDOE
Grant/Contract Number:
AC52-07NA27344
OSTI ID:
1343009
Report Number(s):
LLNL-JRNL-674354; TRN: US1701671
Journal Information:
Fusion Science and Technology, Vol. 70, Issue 2; ISSN 1536-1055
Publisher:
American Nuclear SocietyCopyright Statement
Country of Publication:
United States
Language:
English
Citation Metrics:
Cited by: 5 works
Citation information provided by
Web of Science

References (5)

Cryogenic Target System for Hydrogen Layering journal February 2016
Introduction of planar compliant joints designed for combined bending and axial loading conditions in lamina emergent mechanisms journal October 2012
Handbook of Compliant Mechanisms book February 2013
Lamina Emergent Torsional (LET) Joint journal November 2009
Compliant systems using monolithic mechanisms journal March 2001

Cited By (3)

Membrane-Enhanced Lamina Emergent Torsional Joints for Surrogate Folds journal April 2018
Regional Stiffness Reduction Using Lamina Emergent Torsional Joints for Flexible Printed Circuit Board Design journal July 2018
Symmetric Equations for Evaluating Maximum Torsion Stress of Rectangular Beams in Compliant Mechanisms journal February 2018

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Related Subjects

46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
3 DOF
flexure
precision alignment