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The Effect of Deformation Rate on the Damage Tolerances of Nomex Honeycomb Cored Composite Sandwiches = = Nomex bal Petegi Dolgulu Kompozit Sandviclerde Deformasyon Hizinin Hasar Toleransina Etkisi.

紀錄類型:	書目-電子資源 : Monograph/item
正題名/作者:	The Effect of Deformation Rate on the Damage Tolerances of Nomex Honeycomb Cored Composite Sandwiches =/
其他題名:	Nomex bal Petegi Dolgulu Kompozit Sandviclerde Deformasyon Hizinin Hasar Toleransina Etkisi.
其他題名:	Nomex bal Petegi Dolgulu Kompozit Sandviclerde Deformasyon Hizinin Hasar Toleransina Etkisi.
作者:	Celik, Muhammet.
面頁冊數:	1 online resource (90 pages)
附註:	Source: Masters Abstracts International, Volume: 83-11.
Contained By:	Masters Abstracts International83-11.
標題:	Load. -
電子資源:	http://pqdd.sinica.edu.tw/twdaoapp/servlet/advanced?query=29079294click for full text (PQDT)
ISBN:	9798426883536

The Effect of Deformation Rate on the Damage Tolerances of Nomex Honeycomb Cored Composite Sandwiches = = Nomex bal Petegi Dolgulu Kompozit Sandviclerde Deformasyon Hizinin Hasar Toleransina Etkisi.
Celik, Muhammet.

The Effect of Deformation Rate on the Damage Tolerances of Nomex Honeycomb Cored Composite Sandwiches =Nomex bal Petegi Dolgulu Kompozit Sandviclerde Deformasyon Hizinin Hasar Toleransina Etkisi.Nomex bal Petegi Dolgulu Kompozit Sandviclerde Deformasyon Hizinin Hasar Toleransina Etkisi. - 1 online resource (90 pages)

Source: Masters Abstracts International, Volume: 83-11.

Thesis (Master's)--Izmir Institute of Technology (Turkey), 2021.

Includes bibliographical references

The impact response and damage tolerance of E-glass/epoxy faces and Nomex honeycomb core sandwich were determined experimentally at different velocities (0-40 ms-1). Concentrated quasi-static indentation force (CQIF), low-velocity impact (LVI) and high-velocity impact (HVI) tests were performed sequentially using a universal test machine, a drop weight tester and a modified Split Hopkinson Pressure Bar system using a hemispherical indenter with a diameter of 16 mm. Velocity was increased by reducing the mass of the indenter in HVI. HVI was performed at the same impact energies (3-33 J) as LVI. Although CQIF and LVI showed similar damage modes, front face damage initiation and perforation occurred at higher energies in LVI, which was ascribed to the rate sensitivity of the face material. When the front face was penetrated at 10 J, residual strength was found to reduce 60%. The flexural waves and core shear were observed to become dominant above 40 J. Barely visible damage was identified below 10 J with a dent depth less than 1 mm, the damage area less than 50 mm2 and an NRS of ~0.8. Visible damage occurred between 50-400 mm2 damage areas when the front face was perforated (10-39 J). Discrete source damage was detected between 400-800 mm2 where full-penetration and core shear occurred (>40 J). Although damage areas in HVI were smaller than those of LVI at the same energies, compression after impact tests showed almost no effect of velocity on NRS, except HVI tested coupon showed a slightly higher mean NRS at 5.5 J.

Electronic reproduction.
Ann Arbor, Mich. :
ProQuest,
2023

Mode of access: World Wide Web

ISBN: 9798426883536Subjects--Topical Terms:

3562902
Load.
Index Terms--Genre/Form:

542853
Electronic books.

The Effect of Deformation Rate on the Damage Tolerances of Nomex Honeycomb Cored Composite Sandwiches = = Nomex bal Petegi Dolgulu Kompozit Sandviclerde Deformasyon Hizinin Hasar Toleransina Etkisi.
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245 1 4 $a The Effect of Deformation Rate on the Damage Tolerances of Nomex Honeycomb Cored Composite Sandwiches = $b Nomex bal Petegi Dolgulu Kompozit Sandviclerde Deformasyon Hizinin Hasar Toleransina Etkisi.
246 3 1 $a Nomex bal Petegi Dolgulu Kompozit Sandviclerde Deformasyon Hizinin Hasar Toleransina Etkisi.
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500 $a Source: Masters Abstracts International, Volume: 83-11.
500 $a Advisor: Guden, Mustafa.
502 $a Thesis (Master's)--Izmir Institute of Technology (Turkey), 2021.
504 $a Includes bibliographical references
520 $a The impact response and damage tolerance of E-glass/epoxy faces and Nomex honeycomb core sandwich were determined experimentally at different velocities (0-40 ms-1). Concentrated quasi-static indentation force (CQIF), low-velocity impact (LVI) and high-velocity impact (HVI) tests were performed sequentially using a universal test machine, a drop weight tester and a modified Split Hopkinson Pressure Bar system using a hemispherical indenter with a diameter of 16 mm. Velocity was increased by reducing the mass of the indenter in HVI. HVI was performed at the same impact energies (3-33 J) as LVI. Although CQIF and LVI showed similar damage modes, front face damage initiation and perforation occurred at higher energies in LVI, which was ascribed to the rate sensitivity of the face material. When the front face was penetrated at 10 J, residual strength was found to reduce 60%. The flexural waves and core shear were observed to become dominant above 40 J. Barely visible damage was identified below 10 J with a dent depth less than 1 mm, the damage area less than 50 mm2 and an NRS of ~0.8. Visible damage occurred between 50-400 mm2 damage areas when the front face was perforated (10-39 J). Discrete source damage was detected between 400-800 mm2 where full-penetration and core shear occurred (>40 J). Although damage areas in HVI were smaller than those of LVI at the same energies, compression after impact tests showed almost no effect of velocity on NRS, except HVI tested coupon showed a slightly higher mean NRS at 5.5 J.
520 $a E-cam/epoksi yuzey tabakali ile Nomex bal petegi dolgulu sandvic yapinin carpma tepkisi ve hasar toleransi farkli carpma hizlarinda (0-40 ms-1) deneysel olarak belirlendi. 16 mm capli yari kure darbe ucu kullanilarak statik-esdeger delme, dusuk hizli carpma (DHC) ve yuksek hizli carpma (YHC) testleri, sirasiyla konvansiyonel test cihazi, dusen agirlik test cihazi ve modifiye edilmis split-Hopkinson Basinc Bar sistemi kullanilarak gerceklestirildi. YHC'lerde carpma ucun kutlesi dusurulerek hiz arttirilmistir. YHC, DHC ile ayni enerjirinde gerceklestirilmistir (3-33 J).YSD ile DHC testleri benzer hasarlar sergilerken on yuzey tabakasindaki malzemenin hiz duyarliligindan dolayi YHC testlerinde carpma yuz tabakasinda hasar baslangici ve delinmesi daha yuksek enerjilerde gerceklesir. 10 J'de on yuzey tabakasinin delinmesiyle artik dayanimin %60 azaldigi bulunmustur. 40 J'nin uzerinde, egilme dalgalari dolguda boyuna kesme etkileri baskin hale geldigi gozlemlenmistir. 10 J'nin alti 1 mm'den az gocuk derinligi, 50 mm2'den az hasar alani ve ~0.8'lik normallestirilmis artik dayanimi (NAD) sergilediginden zor gorulebilen hasar olarak tespit edildi. Gorunur carpma hasari 10-39 J'de on yuzey delinerek 50-400 mm2 hasarla gerceklesir. 400-800 mm2 arasindaki hasar, tam delinmenin ve dolguda kesmelerin gerceklestigi (>40 J) ayri kaynak hasari olarak bulundu. YHC'deki hasar alanlari, ayni enerjilerde DHC'ninkinden daha kucuk olmasina karsin, carpma sonrasi basma testleri, YHC test kuponunun 5.5 J'de biraz daha yuksek NAD gostermesi disinda, hizin NAD uzerine neredeyse hic etkisi olmadi.
533 $a Electronic reproduction. $b Ann Arbor, Mich. : $c ProQuest, $d 2023
538 $a Mode of access: World Wide Web
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650 4 $a Behavior. $3 532476
650 4 $a Manufacturing. $3 3389707
650 4 $a Failure. $3 3561225
650 4 $a Discount coupons. $3 3560293
650 4 $a Crack initiation. $3 3564902
650 4 $a Skin. $3 843661
650 4 $a Energy. $3 876794
650 4 $a Adhesives. $3 871837
650 4 $a Aerospace engineering. $3 1002622
650 4 $a Boundary conditions. $3 3560411
650 4 $a Test methods. $3 3564811
650 4 $a Composite materials. $3 654082
650 4 $a Crack propagation. $3 3683840
650 4 $a Propagation. $3 3680519
650 4 $a Polymers. $3 535398
650 4 $a Carbon fibers. $3 685794
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650 4 $a Ductility. $3 3681454
650 4 $a Design. $3 518875
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