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Hyperelastic Modeling of Rohacell Foams by Employing the Planar Tension Test.

Record Type:	Language materials, manuscript : Monograph/item
Title/Author:	Hyperelastic Modeling of Rohacell Foams by Employing the Planar Tension Test./
Author:	Drane, Benjamin Clark.
Description:	1 online resource (181 pages)
Notes:	Source: Masters Abstracts International, Volume: 56-04.
Subject:	Aerospace engineering. -
Online resource:	click for full text (PQDT)
ISBN:	9781369808780

Hyperelastic Modeling of Rohacell Foams by Employing the Planar Tension Test.
Drane, Benjamin Clark.

Hyperelastic Modeling of Rohacell Foams by Employing the Planar Tension Test. - 1 online resource (181 pages)

Source: Masters Abstracts International, Volume: 56-04.

Thesis (M.S.)--Tennessee Technological University, 2017.

Includes bibliographical references

Polymethacrylimide (PMI) foams are becoming the preferred material choice for sandwich structure cores. Rohacell, one of the industry's leading PMI foams, demonstrates varying degrees of nonlinear elastic behavior. In order to capture this behavior, a hyperelastic material model was calibrated from test data using a novel specimen geometry. The calibration of hyperelastic foam models typically requires experimental data from difficult and expensive test methods. Motivated by this, a relatively inexpensive test method called the planar tension test was employed to calibrate a compressible hyperelastic foam model called Hyperfoam. Although the planar tension test is typically used only on hyperelastic elastomers, it is hypothesized that using it on Rohacell will improve the performance of the Hyperfoam model.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2018

Mode of access: World Wide Web

ISBN: 9781369808780Subjects--Topical Terms:

686400
Aerospace engineering.
Index Terms--Genre/Form:

554714
Electronic books.

Hyperelastic Modeling of Rohacell Foams by Employing the Planar Tension Test.
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245 1 0 $a Hyperelastic Modeling of Rohacell Foams by Employing the Planar Tension Test.
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500 $a Source: Masters Abstracts International, Volume: 56-04.
500 $a Adviser: Jane Liu.
502 $a Thesis (M.S.)--Tennessee Technological University, 2017.
504 $a Includes bibliographical references
520 $a Polymethacrylimide (PMI) foams are becoming the preferred material choice for sandwich structure cores. Rohacell, one of the industry's leading PMI foams, demonstrates varying degrees of nonlinear elastic behavior. In order to capture this behavior, a hyperelastic material model was calibrated from test data using a novel specimen geometry. The calibration of hyperelastic foam models typically requires experimental data from difficult and expensive test methods. Motivated by this, a relatively inexpensive test method called the planar tension test was employed to calibrate a compressible hyperelastic foam model called Hyperfoam. Although the planar tension test is typically used only on hyperelastic elastomers, it is hypothesized that using it on Rohacell will improve the performance of the Hyperfoam model.
520 $a Three different grades of Rohacell were chosen for investigation: 200 WF, 200 HERO, and 71 HERO. A redesign of the classic planar tension test was developed through iterative modeling to be suitable for a brittle material. This test, along with the uniaxial tension test, was used to calibrate six different variations of the Hyperfoam model for all three Rohacell grades. The performance of the model variations was measured by comparing the model predictions to experimental data. Digital image correlation (DIC), a non-contact strain measurement method, was implemented. Further validation was sought in the design, fabrication, and testing of a unique shear test specimen termed the "Offset-Hole Shear" test, or simply the OHS test.
520 $a The planar tension test data obtained in the present study did not improve the accuracy of the Hyperfoam model but rather worsened its performance. Furthermore, calibrating the Hyperfoam model with only uniaxial data provided better behavioral prediction than when the model was calibrated with both uniaxial and planar tension data. When the Hyperfoam model was calibrated with only uniaxial tension data, it was shown for all grades of Rohacell tested, that it delivers better performance than the linear elastic model.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2018
538 $a Mode of access: World Wide Web
650 4 $a Aerospace engineering. $3 686400
650 4 $a Mechanical engineering. $3 557493
650 4 $a Materials science. $3 557839
650 4 $a Civil engineering. $3 561339
655 7 $a Electronic books. $2 local $3 554714
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710 2 $a ProQuest Information and Learning Co. $3 1178819
710 2 $a Tennessee Technological University. $b Civil Engineering. $3 1187110
856 4 0 $u http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=10226400 $z click for full text (PQDT)