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Nondestructive Approach for Defect D...

Esola, Shane A.

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Nondestructive Approach for Defect Detection in Hard Armor Protective Inserts.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	Nondestructive Approach for Defect Detection in Hard Armor Protective Inserts./
作者:	Esola, Shane A.
出版者:	Ann Arbor : ProQuest Dissertations & Theses, : 2020,
面頁冊數:	301 p.
附註:	Source: Dissertations Abstracts International, Volume: 81-10, Section: B.
Contained By:	Dissertations Abstracts International81-10B.
標題:	Mechanics. -
電子資源:	https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27832185
ISBN:	9798607307721

Nondestructive Approach for Defect Detection in Hard Armor Protective Inserts.
Esola, Shane A.

Nondestructive Approach for Defect Detection in Hard Armor Protective Inserts. - Ann Arbor : ProQuest Dissertations & Theses, 2020 - 301 p.

Source: Dissertations Abstracts International, Volume: 81-10, Section: B.

Thesis (Ph.D.)--Drexel University, 2020.

This item must not be sold to any third party vendors.

Delamination detection in hard body armor is uniquely challenging and has affected the defense acquisition plan while generating uncertainty with respect to ballistic performance. The ability to confidently detect armor delamination is necessary to protect the warfighter and manage risk. The tap test has long been a benchmark in nondestructive inspection (NDI), including the investigation of composite structure delamination. The application of impact-based NDI to composite parts, although widely reported, is still hampered by a number of challenges. In a simple summary, NDI can be characterized as an inverse problem with the goal of inferring the presence of a defect by interpreting and extrapolating the system's "reaction" under controlled conditions. The fundamental challenge is that realistic armor delaminations (e.g. from manufacturing) may be too deep or too slight to be confidently deconvolved from the noise generated by armor system complications using an impact-based NDI approach.The subject research postulates that existing impact-based methods are not sensitive enough to detect small defects in thick-sectioned, finite-geometry, laminar composites such as hard body armor; however, modifications to the impact-based approach may provide greater sensitivity in discerning the presence of small delaminations. The research approach has three objectives: (1) define the target defect in hard armor protective inserts (2) evaluate the capabilities and limitations of impact-based NDI (3) propose methodology improvements that may achieve the desired sensitivity for hard armor inserts. Defect characterization, method sensitivity, potential confounds, and the extension to small defects are discussed. Impact-based NDI is a rudimentary tool that is deceivingly simple, yet versatile and widely applied. Under the right conditions, it can illuminate delamination in complex material systems.

ISBN: 9798607307721Subjects--Topical Terms:

525881
Mechanics.
Subjects--Index Terms:

Armor

Nondestructive Approach for Defect Detection in Hard Armor Protective Inserts.
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100 1 $a Esola, Shane A. $3 3553445
245 1 0 $a Nondestructive Approach for Defect Detection in Hard Armor Protective Inserts.
260 1 $a Ann Arbor : $b ProQuest Dissertations & Theses, $c 2020
300 $a 301 p.
500 $a Source: Dissertations Abstracts International, Volume: 81-10, Section: B.
500 $a Advisor: Kontsos, Antonios;Bartoli, Ivan.
502 $a Thesis (Ph.D.)--Drexel University, 2020.
506 $a This item must not be sold to any third party vendors.
520 $a Delamination detection in hard body armor is uniquely challenging and has affected the defense acquisition plan while generating uncertainty with respect to ballistic performance. The ability to confidently detect armor delamination is necessary to protect the warfighter and manage risk. The tap test has long been a benchmark in nondestructive inspection (NDI), including the investigation of composite structure delamination. The application of impact-based NDI to composite parts, although widely reported, is still hampered by a number of challenges. In a simple summary, NDI can be characterized as an inverse problem with the goal of inferring the presence of a defect by interpreting and extrapolating the system's "reaction" under controlled conditions. The fundamental challenge is that realistic armor delaminations (e.g. from manufacturing) may be too deep or too slight to be confidently deconvolved from the noise generated by armor system complications using an impact-based NDI approach.The subject research postulates that existing impact-based methods are not sensitive enough to detect small defects in thick-sectioned, finite-geometry, laminar composites such as hard body armor; however, modifications to the impact-based approach may provide greater sensitivity in discerning the presence of small delaminations. The research approach has three objectives: (1) define the target defect in hard armor protective inserts (2) evaluate the capabilities and limitations of impact-based NDI (3) propose methodology improvements that may achieve the desired sensitivity for hard armor inserts. Defect characterization, method sensitivity, potential confounds, and the extension to small defects are discussed. Impact-based NDI is a rudimentary tool that is deceivingly simple, yet versatile and widely applied. Under the right conditions, it can illuminate delamination in complex material systems.
590 $a School code: 0065.
650 4 $a Mechanics. $3 525881
650 4 $a Acoustics. $3 879105
650 4 $a Mechanical engineering. $3 649730
653 $a Armor
653 $a Composite
653 $a Delamination
653 $a Impact-echo
653 $a Nondestructive Inspection
653 $a Tap test
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690 $a 0986
690 $a 0548
710 2 $a Drexel University. $b Mechanical Engineering and Mechanics (College of Engineering). $3 3168962
773 0 $t Dissertations Abstracts International $g 81-10B.
790 $a 0065
791 $a Ph.D.
792 $a 2020
793 $a English
856 4 0 $u https://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=27832185