Author: Mitch Alan Okeson
Publisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 198
Book Description
The Effects of Moisture and Low-temperature Thermal Cycling on Damage Growth in Fiberglass/epoxy Laminates
Author: Mitch Alan Okeson
Publisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 198
Book Description
Publisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 198
Book Description
The Effects of Moisture, Low Temperature, and Low Temperate Thermal Cycling on the Strength and Stiffness of Unidirectional Carbon/epoxy Laminates
Author: Edward Cyrus Peterson
Publisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 206
Book Description
Publisher:
ISBN:
Category : Composite materials
Languages : en
Pages : 206
Book Description
Effects of Moisture, Residual Thermal Curing Stresses, and Mechanical Load on the Damage Development in Quasi-Isotropic Laminates
Author: RD. Kriz
Publisher:
ISBN:
Category : Characteristic damage state
Languages : en
Pages : 18
Book Description
This investigation demonstrates how moisture absorbed in [0/±45/90]s and [0/90/±45]s graphite epoxy laminates significantly alters the stress state and chronology of damage development along the laminate edge during static tension and tension-tension cyclic loading.
Publisher:
ISBN:
Category : Characteristic damage state
Languages : en
Pages : 18
Book Description
This investigation demonstrates how moisture absorbed in [0/±45/90]s and [0/90/±45]s graphite epoxy laminates significantly alters the stress state and chronology of damage development along the laminate edge during static tension and tension-tension cyclic loading.
NASA Technical Memorandum
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 230
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 230
Book Description
Hygrothermal Damage Mechanisms in Graphite-epoxy Composites
Author: Frank W. Crossman
Publisher:
ISBN:
Category : Epoxy resins
Languages : en
Pages : 166
Book Description
Publisher:
ISBN:
Category : Epoxy resins
Languages : en
Pages : 166
Book Description
Scientific and Technical Aerospace Reports
Author:
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 312
Book Description
Publisher:
ISBN:
Category : Aeronautics
Languages : en
Pages : 312
Book Description
The Effects of Thermal Cycling on the Damage Evolution and Property Changes in Graphite Fiber Reinforced Epoxy-cyanate Blend Matrix Laminates
Author: Brian J. Knouff
Publisher:
ISBN:
Category :
Languages : en
Pages : 238
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 238
Book Description
A Model of the Thermal-spike Mechanism in Graphite/epoxy Laminates
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 34
Book Description
Publisher:
ISBN:
Category :
Languages : en
Pages : 34
Book Description
Impact of Thermal Cycling on Carbon Fiber Reinforced Glass Epoxy Laminates
Author: L Subhadra Burugula
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages :
Book Description
Wind Turbine blade icing is a serious problem in cold climates, which leads to production losses, failure of the blade, ice throw etc. To eliminate production downtime associated with icing of wind turbine blades, a structurally integrated, carbon fiber based wind turbine blade heating system has been proposed. The de-icing of the blades, where the carbon fiber element is heated which results in a temperature gradient across the blade which may compromise the structural properties of the material. This is explained by the uneven thermal expansion of the different components in the composite (blade) material. Due to the micro-cracking in the composite material it leads to deterioration of the material which further leads to failure. There is a need to investigate the effects of thermal cycling on the structural properties of the composite material. The two main parts of this thesis include the thermal cycling of the CF reinforced glass epoxy laminate samples and Flexural testing on the thermal cycled samples. Thermal cycling is performed on CF reinforced glass epoxy laminate samples with a range of -18 °C to 4 °C with a hold time of 10 minutes for each heating/cooling cycle. A set of 6 samples were taken for each thermal cycle and ran 0, 50, 100, 200 thermal cycles. Temperatures of the samples were recorded using the computer program as well as pictures were taken using a thermal camera; from this data it shows that there is a considerable temperature difference between the carbon fiber and side thermocouples. To study the effects of this temperature gradient on the flexural properties of the laminate, on all the samples three point bending tests (following ASTM standards) are performed and examined for any change in the properties with the increase in the number of thermal cycles. Test results showed that there is very little decrease in the ultimate stress when numbers of thermal cycles were increased from 0 to 200; this decrease is not significant to affect or degrade the material properties of the sample. There might be an effect on material properties when thermal cycling is done in higher levels with more thermal cycling temperature range.
Publisher:
ISBN:
Category : Mechanical engineering
Languages : en
Pages :
Book Description
Wind Turbine blade icing is a serious problem in cold climates, which leads to production losses, failure of the blade, ice throw etc. To eliminate production downtime associated with icing of wind turbine blades, a structurally integrated, carbon fiber based wind turbine blade heating system has been proposed. The de-icing of the blades, where the carbon fiber element is heated which results in a temperature gradient across the blade which may compromise the structural properties of the material. This is explained by the uneven thermal expansion of the different components in the composite (blade) material. Due to the micro-cracking in the composite material it leads to deterioration of the material which further leads to failure. There is a need to investigate the effects of thermal cycling on the structural properties of the composite material. The two main parts of this thesis include the thermal cycling of the CF reinforced glass epoxy laminate samples and Flexural testing on the thermal cycled samples. Thermal cycling is performed on CF reinforced glass epoxy laminate samples with a range of -18 °C to 4 °C with a hold time of 10 minutes for each heating/cooling cycle. A set of 6 samples were taken for each thermal cycle and ran 0, 50, 100, 200 thermal cycles. Temperatures of the samples were recorded using the computer program as well as pictures were taken using a thermal camera; from this data it shows that there is a considerable temperature difference between the carbon fiber and side thermocouples. To study the effects of this temperature gradient on the flexural properties of the laminate, on all the samples three point bending tests (following ASTM standards) are performed and examined for any change in the properties with the increase in the number of thermal cycles. Test results showed that there is very little decrease in the ultimate stress when numbers of thermal cycles were increased from 0 to 200; this decrease is not significant to affect or degrade the material properties of the sample. There might be an effect on material properties when thermal cycling is done in higher levels with more thermal cycling temperature range.
Engine Structures
Author:
Publisher:
ISBN:
Category : Engines
Languages : en
Pages : 232
Book Description
Publisher:
ISBN:
Category : Engines
Languages : en
Pages : 232
Book Description