The Experts below are selected from a list of 45 Experts worldwide ranked by ideXlab platform

Vincent Placet - One of the best experts on this subject based on the ideXlab platform.

  • About the fatigue endurance of unidirectional flax-epoxy Composite laminates
    Composites Part B: Engineering, 2019
    Co-Authors: Thomas Jeannin, Xavier Gabrion, Emmanuel Ramasso, Vincent Placet
    Abstract:

    Even if the knowledge on the fatigue behaviour of Plant Fibre Composites has increased steadily in the last few years, some issues still remain open at the present time. Such is the case, for instance, of the high-cycle fatigue strength. Actually, most of the fatigue studies available in the open literature to date are limited to a maximum of 1-2 million cycles. All available stress-life plots exhibit linear trends with constant slope and does not reveal any fatigue limit for these given cycle numbers. So, this paper proposes to investigate the High-Cycle Fatigue behaviour of a flax-epoxy laminated Composite. The effect of loading frequency is firstly evaluated on the Low-Cycle Fatigue behaviour using a multi-instrumented analysis including infrared thermography and acoustic emission. Results show that high frequency could be a suitable method to shorten the fatigue tests and study the High Cycle Fatigue behaviour of this type of Composite material. Based on this result, high-frequency (30 Hz) is used to investigate the behaviour of the flax-epoxy Composite on a range of 106- 108 cycles. Results show that fatigue damage continues to evolve and the maximum stress continues to decrease as a function of increasing number of cycles, following a power-law trend. This result suggests that, if a fatigue limit does exist for unidirectional flax-epoxy Composite laminates, it is so low that it cannot observed in tests up to 108 cycles. It is also recommended to take it into consideration when designing Plant Fibre Composite structures.

Thomas Jeannin - One of the best experts on this subject based on the ideXlab platform.

  • About the fatigue endurance of unidirectional flax-epoxy Composite laminates
    Composites Part B: Engineering, 2019
    Co-Authors: Thomas Jeannin, Xavier Gabrion, Emmanuel Ramasso, Vincent Placet
    Abstract:

    Even if the knowledge on the fatigue behaviour of Plant Fibre Composites has increased steadily in the last few years, some issues still remain open at the present time. Such is the case, for instance, of the high-cycle fatigue strength. Actually, most of the fatigue studies available in the open literature to date are limited to a maximum of 1-2 million cycles. All available stress-life plots exhibit linear trends with constant slope and does not reveal any fatigue limit for these given cycle numbers. So, this paper proposes to investigate the High-Cycle Fatigue behaviour of a flax-epoxy laminated Composite. The effect of loading frequency is firstly evaluated on the Low-Cycle Fatigue behaviour using a multi-instrumented analysis including infrared thermography and acoustic emission. Results show that high frequency could be a suitable method to shorten the fatigue tests and study the High Cycle Fatigue behaviour of this type of Composite material. Based on this result, high-frequency (30 Hz) is used to investigate the behaviour of the flax-epoxy Composite on a range of 106- 108 cycles. Results show that fatigue damage continues to evolve and the maximum stress continues to decrease as a function of increasing number of cycles, following a power-law trend. This result suggests that, if a fatigue limit does exist for unidirectional flax-epoxy Composite laminates, it is so low that it cannot observed in tests up to 108 cycles. It is also recommended to take it into consideration when designing Plant Fibre Composite structures.

Jingzong Zhang - One of the best experts on this subject based on the ideXlab platform.

  • Effect of thermal insulation components on physical and mechanical properties of Plant Fibre Composite thermal insulation mortar
    Journal of Materials Research and Technology, 2020
    Co-Authors: Demin Jiang, Suping Cui, Shiguo Sun, Xiaoruan Song, Jingzong Zhang
    Abstract:

    Abstract To improve the resource level of agricultural and forestry waste straws and fallen leaves, straw and fallen leaves Fibres were used as organic thermal insulation components (TICs). Vitrified beads and closed-pore expanded perlite were used as inorganic TICs to prepare Plant Fibre cement-based Composite thermal insulation mortar (TIM). The effects of TICs on physical and mechanical properties of TIM were studied by altering the types and contents of TICs. The results show that the fluidity of the TIM decreases with the incorporation of Plant Fibres in the vitrified bead + expanded perlite TIM. With the addition of wheat straw Fibre and straw Fibre, the homogeneity of TIM mixture is improved. Plant Fibres have the characteristics of lightweight, porosity, water absorption and heat preservation, which increases water absorption and heat retention and a decrease in strength of the TIM. With the incorporation of three Plant Fibres of leaves, wheat straw and straw, the water absorption of TIM increased by 15.84, 5.47, and 4.54% respectively. At the same time, thermal conductivity decreased by 0.17, 0.19, and 0.20 W/(m.K), respectively, flexural strength decreased by 3.99, 2.63, and 2.44 MPa, and compressive strength decreased by 20.91, 17.13, and 19.25 MPa, respectively. After the expanded perlite and vitrified microbeads are modified with pure acrylic emulsion, the polymer film retains more pores inside the Fibres, enhances the interface bonding with the cement-based material, which is helpful to improve the thermal insulation properties and strength of the TIM.

Xavier Gabrion - One of the best experts on this subject based on the ideXlab platform.

  • About the fatigue endurance of unidirectional flax-epoxy Composite laminates
    Composites Part B: Engineering, 2019
    Co-Authors: Thomas Jeannin, Xavier Gabrion, Emmanuel Ramasso, Vincent Placet
    Abstract:

    Even if the knowledge on the fatigue behaviour of Plant Fibre Composites has increased steadily in the last few years, some issues still remain open at the present time. Such is the case, for instance, of the high-cycle fatigue strength. Actually, most of the fatigue studies available in the open literature to date are limited to a maximum of 1-2 million cycles. All available stress-life plots exhibit linear trends with constant slope and does not reveal any fatigue limit for these given cycle numbers. So, this paper proposes to investigate the High-Cycle Fatigue behaviour of a flax-epoxy laminated Composite. The effect of loading frequency is firstly evaluated on the Low-Cycle Fatigue behaviour using a multi-instrumented analysis including infrared thermography and acoustic emission. Results show that high frequency could be a suitable method to shorten the fatigue tests and study the High Cycle Fatigue behaviour of this type of Composite material. Based on this result, high-frequency (30 Hz) is used to investigate the behaviour of the flax-epoxy Composite on a range of 106- 108 cycles. Results show that fatigue damage continues to evolve and the maximum stress continues to decrease as a function of increasing number of cycles, following a power-law trend. This result suggests that, if a fatigue limit does exist for unidirectional flax-epoxy Composite laminates, it is so low that it cannot observed in tests up to 108 cycles. It is also recommended to take it into consideration when designing Plant Fibre Composite structures.

Emmanuel Ramasso - One of the best experts on this subject based on the ideXlab platform.

  • About the fatigue endurance of unidirectional flax-epoxy Composite laminates
    Composites Part B: Engineering, 2019
    Co-Authors: Thomas Jeannin, Xavier Gabrion, Emmanuel Ramasso, Vincent Placet
    Abstract:

    Even if the knowledge on the fatigue behaviour of Plant Fibre Composites has increased steadily in the last few years, some issues still remain open at the present time. Such is the case, for instance, of the high-cycle fatigue strength. Actually, most of the fatigue studies available in the open literature to date are limited to a maximum of 1-2 million cycles. All available stress-life plots exhibit linear trends with constant slope and does not reveal any fatigue limit for these given cycle numbers. So, this paper proposes to investigate the High-Cycle Fatigue behaviour of a flax-epoxy laminated Composite. The effect of loading frequency is firstly evaluated on the Low-Cycle Fatigue behaviour using a multi-instrumented analysis including infrared thermography and acoustic emission. Results show that high frequency could be a suitable method to shorten the fatigue tests and study the High Cycle Fatigue behaviour of this type of Composite material. Based on this result, high-frequency (30 Hz) is used to investigate the behaviour of the flax-epoxy Composite on a range of 106- 108 cycles. Results show that fatigue damage continues to evolve and the maximum stress continues to decrease as a function of increasing number of cycles, following a power-law trend. This result suggests that, if a fatigue limit does exist for unidirectional flax-epoxy Composite laminates, it is so low that it cannot observed in tests up to 108 cycles. It is also recommended to take it into consideration when designing Plant Fibre Composite structures.