Fatigue behaviour of tailored blank thermoplastic composites with internal ply-drops

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00010669%3A_____%2F17%3AN0000035" target="_blank" >RIV/00010669:_____/17:N0000035 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2452321617302561?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2452321617302561?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.prostr.2017.07.144" target="_blank" >10.1016/j.prostr.2017.07.144</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Fatigue behaviour of tailored blank thermoplastic composites with internal ply-drops

Popis výsledku v původním jazyce

The technology of tailored blanks is used for thickness variation within a laminate plate to reduce weight in areas with lower loading. Ply-drops are used for the thickness variation and their effect on fatigue characteristics has not yet been investigated for the thermoplastic matrix. This paper describes experimental investigation of asymmetrically tapered carbon fibre-reinforced thermoplastic specimens cyclically loaded in tension. The specimens were manufactured according to design features of a rib demonstrator used in an aerospace structure. Two alternatives of transitions were investigated: single taper from 16 to 11 layers and double taper from 16 to 13 and then from 13 to 11 layers. The two taper alternative significantly improved the fatigue life. Furthermore, the effect of specimen edge quality (abrasive waterjet cutting and milling) caused the change of fatigue life by 25%. In case of the run-out specimens with more than 3 million cycles, an early failure occurred at higher load levels due to damage accumulation. Fractographic examination using scanning electron microscopy confirmed occurrence of various features typical for two observed failure modes. It was shown that laminate edges of ply-drop integrated structures should be machined precisely in order to maintain their durability.

Název v anglickém jazyce

Fatigue behaviour of tailored blank thermoplastic composites with internal ply-drops

Popis výsledku anglicky

The technology of tailored blanks is used for thickness variation within a laminate plate to reduce weight in areas with lower loading. Ply-drops are used for the thickness variation and their effect on fatigue characteristics has not yet been investigated for the thermoplastic matrix. This paper describes experimental investigation of asymmetrically tapered carbon fibre-reinforced thermoplastic specimens cyclically loaded in tension. The specimens were manufactured according to design features of a rib demonstrator used in an aerospace structure. Two alternatives of transitions were investigated: single taper from 16 to 11 layers and double taper from 16 to 13 and then from 13 to 11 layers. The two taper alternative significantly improved the fatigue life. Furthermore, the effect of specimen edge quality (abrasive waterjet cutting and milling) caused the change of fatigue life by 25%. In case of the run-out specimens with more than 3 million cycles, an early failure occurred at higher load levels due to damage accumulation. Fractographic examination using scanning electron microscopy confirmed occurrence of various features typical for two observed failure modes. It was shown that laminate edges of ply-drop integrated structures should be machined precisely in order to maintain their durability.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)

Projekt

<a href="/cs/project/TA03010209" target="_blank" >TA03010209: Výzkum a vývoj moderních technologií výroby dílů a nových aplikací z high performance kompozitů s termoplastovou matricí</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2017

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Procedia Structural Integrity

ISBN

—

ISSN

2452-3216

e-ISSN

—

Počet stran výsledku

7

Strana od-do

1342-1348

Název nakladatele

ELSEVIER SCIENCE BV

Místo vydání

Amsterdam

Místo konání akce

Funchal, PORTUGAL

Datum konání akce

4. 9. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000419177800180