The effect of long-time moisture exposure and low temperatures on mechanical behavior of open-hole Cfrp laminate
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68407700%3A21220%2F21%3A00349854" target="_blank" >RIV/68407700:21220/21:00349854 - isvavai.cz</a>
Výsledek na webu
<a href="https://doi.org/10.1002/pc.26082" target="_blank" >https://doi.org/10.1002/pc.26082</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1002/pc.26082" target="_blank" >10.1002/pc.26082</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
The effect of long-time moisture exposure and low temperatures on mechanical behavior of open-hole Cfrp laminate
Popis výsledku v původním jazyce
Carbon fiber composite laminates (CFRP) used in aerospace are operating under various environmental conditions. Parts are often exposed to moisture which slowly diffuses into the lam inate and forms internal stresses. During the flight, the aircraft is also exposed to low or elevated temperatures. The result is negative impact on composite performance due to formation of hygrothermal stresses. Understanding this phenomenon helps with prediction of the damage development which is vital for increasing the components service life. The open-hole CFRP laminates were conditioned in humid air at 70 °C/85% RH for 33,800 h and the effect of low temperatures on quasi-cyclic tension properties and fracture behavior was investigated. The mechanical tests on two types of CFRP laminate with different number and orientation of plies were performed under -55 °C. The material behavior during the testing was monitored by acoustic emission technique. The light optical microscopy and scanning electron microscopy were used for the identification of failure mechanisms. The study showed that the hygrothermal effect has significant impact on materials toughness reduction. The damage mechanisms and characteristic morphologic features are changing due to the matrix degradation and weakened fiber/matrix interface.
Název v anglickém jazyce
The effect of long-time moisture exposure and low temperatures on mechanical behavior of open-hole Cfrp laminate
Popis výsledku anglicky
Carbon fiber composite laminates (CFRP) used in aerospace are operating under various environmental conditions. Parts are often exposed to moisture which slowly diffuses into the lam inate and forms internal stresses. During the flight, the aircraft is also exposed to low or elevated temperatures. The result is negative impact on composite performance due to formation of hygrothermal stresses. Understanding this phenomenon helps with prediction of the damage development which is vital for increasing the components service life. The open-hole CFRP laminates were conditioned in humid air at 70 °C/85% RH for 33,800 h and the effect of low temperatures on quasi-cyclic tension properties and fracture behavior was investigated. The mechanical tests on two types of CFRP laminate with different number and orientation of plies were performed under -55 °C. The material behavior during the testing was monitored by acoustic emission technique. The light optical microscopy and scanning electron microscopy were used for the identification of failure mechanisms. The study showed that the hygrothermal effect has significant impact on materials toughness reduction. The damage mechanisms and characteristic morphologic features are changing due to the matrix degradation and weakened fiber/matrix interface.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
20505 - Composites (including laminates, reinforced plastics, cermets, combined natural and synthetic fibre fabrics; filled composites)
Návaznosti výsledku
Projekt
<a href="/cs/project/EF16_019%2F0000826" target="_blank" >EF16_019/0000826: Centrum pokročilých leteckých technologií</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2021
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
Polymer Composites
ISSN
0272-8397
e-ISSN
1548-0569
Svazek periodika
42
Číslo periodika v rámci svazku
7
Stát vydavatele periodika
US - Spojené státy americké
Počet stran výsledku
16
Strana od-do
3603-3618
Kód UT WoS článku
000641966200001
EID výsledku v databázi Scopus
2-s2.0-85109386895