Crack Closure Detection Using Photometrical Analysis

Савкин, А. Н.; Андроник, А. В.; Abhilash, Ravishankar

doi:10.3311/ppme.7893

Cited by 3 publications

(2 citation statements)

References 7 publications

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“…Satellites are the great examples for the thermal fatigue since they are rotating around the planets and consequently, they experience thermal cycles while traveling from planets' shadows through the sunlight exposure locations. In order to predict the long-term durability, recently, crack closure detection using photometrical analysis is submitted by Savkin et al (2015) and durability and integrity studies of environmentally conditioned interfaces in fibrous polymeric composite: critical concepts and comments is provided by Ray and Rathore (2014).…”

Section: Introductionmentioning

confidence: 99%

Crack growth as a function of temperature variation in carbon fiber/epoxy

Anvari¹

2017

J. Chem. Eng. Mater. Sci.

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The main objective of this paper is to develop a method to predict the crack length and crack growth rate in unidirectional carbon fiber/epoxy composite as a function of temperature variation. In order to measure the crack length and crack growth rate, a new analytical method by applying experimental procedure data is developed. By the novel analytical method, relations are achieved to predict the crack length and crack growth rate in unidirectional carbon fiber/epoxy composite. Finally, by using these relations, comparison between crack length and crack growth rate between two thermal fatigue experiments is done. The results have shown that the crack growth rate in bidirectional carbon fiber/epoxy composite is very higher that in unidirectional carbon fiber/epoxy composite. Investigations regarding the achieved results have shown that the higher crack growth rate is due to the mismatch between the coefficients of thermal expansion in two directions of bidirectional carbon fiber/epoxy composite. The two different coefficients of thermal expansion may cause stress concentration in the inter-laminar plies of the composite and therefore may cause higher crack growth rate.

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Section: Introductionmentioning

confidence: 99%

Crack growth as a function of temperature variation in carbon fiber/epoxy

Anvari¹

2017

J. Chem. Eng. Mater. Sci.

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“…Thus, thermal fatigue analysis of space structures is really important to prevent crack initiation, propagation, and fracture in space environment. In order to predict the long-term durability, recently, "crack closure detection using photometrical analysis is submitted by Savkin et al (2015) and "durability and integrity studies of environmentally conditioned interfaces in fibrous polymeric composite: critical concepts and comments" is provided by Ray and Rathore (2014).…”

Section: Introductionmentioning

confidence: 99%

Thermal fatigue life of carbon nanotube wire and unidirectional carbon fiber/epoxy composite (UCFEC) in earth orbit

Anvari¹

2017

J. Chem. Eng. Mater. Sci.

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The most important target of this study is to develop a method to compare the materials' degradation due to thermal fatigue and temperature variation between the carbon nanotube wire and unidirectional carbon fiber/epoxy composite (UCFEC). In the presented study, by using experimental results data, thermal fatigue life of carbon nanotube wire and unidirectional carbon fiber/epoxy was compared after being exposed to temperature variation in space. This process was done by using a new analytical method that models the material strength deterioration as a function of temperature variation in low Earth orbit thermal cycles. Based on the relations that were obtained by using recommended analytical method, the carbon nanotube wire offered less thermal fatigue strength degradation equal to 6.608% after being subjected to 1,200,000°C temperature variation in comparison with unidirectional carbon fiber/epoxy composite thermal fatigue strength degradation. Therefore, it seems that carbon nanotube wire shows better thermal fatigue resistance. The results of this comparison may be used to determine the suitable carbon material for space missions based on thermal fatigue life.

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