Three-dimensional stress analysis of cracked satin woven carbon fiber reinforced/polymer composites under tension at cryogenic temperatures

Takeda, Tomo; Shindo, Yasuhide; Watanabe, Shinya; Narita, Fumio

doi:10.1016/j.cryogenics.2012.09.002

Cited by 13 publications

(4 citation statements)

References 16 publications

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“…9d). Therefore, we can conclude that changes in the physico-mechanical characteristics of the composites filled with modified WO 2 , after thermocycling, are due to the occurrence of internal stresses in the composites due to the expansion and contraction of both the polyimide matrix and the particles of modified WO 2 , in accordance with their linear coefficients of thermal expansion [56]. Due to the large difference between the linear thermal expansion coefficient of polyimide 5•10 -5 K −1 (ASTM D 696) and the linear thermal expansion coefficient WO 2 − 2•10 -6 •K −1 a temperature change from −190°C to +200°C leads to changes in the thermal stress level in the composite.…”

Section: Physico-mechanical Properties Of the Obtained Composites Under Thermal Cycling Conditions From −190°c To +200°cmentioning

confidence: 84%

Synthesis and property evaluations of highly filled polyimide composites under thermal cycling conditions from −190 °C to +200 °C

2019

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This paper presents data on the synthesis of composites based on polyimide and modified tungsten (IV) oxide (WO 2 ). The resulting, highly filled, polyimide/WO 2 composites were investigated by electron microscopy and thermal analysis in a gas environment of oxygen and argon. The maximum content of modified WO 2, in the studied composites, was 60 wt%. The introduction of WO 2 increases the thermal stability of the composites. For pure polyimide, the upper limit of the operating temperature is 507°C; for a composite with a content of 30 wt% WO 2 − 526°C, and for 60 wt% WO 2 − 554°C in a gas environment of Ar. The change in the physico-mechanical properties of highly filled polyimide composites was studied under the conditions of thermal cycling from −190°C to +200°C. The time of one cycle was 22 min. The thermal cycle was repeated 5, 10 and 20 times. The following parameters were determined: tensile strength, modulus of tensile elasticity and elongation under tension. The introduction of WO 2 slightly reduces the initial strength characteristics of the composites.

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Section: Physico-mechanical Properties Of the Obtained Composites Under Thermal Cycling Conditions From −190°c To +200°cmentioning

confidence: 84%

Synthesis and property evaluations of highly filled polyimide composites under thermal cycling conditions from −190 °C to +200 °C

2019

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“…When the content of PPENK was 15 phr, the maximum bending strength was 230 MPa, which was 45.6% and 88.5% higher than pure E51 at low-temperature (−183 °C) and room temperature, respectively. In low-temperature environments, the molecular chains of E51 and PPENK shrink and become rigid, and the overall stiffness of the system increases [ 44 , 45 ]. In addition, reducing the intermolecular distance increased the intermolecular force, increasing the frictional resistance between the molecules, so the load at the time of failure was larger.…”

Section: Resultsmentioning

confidence: 99%

A New Strategy to Improve the Toughness of Epoxy Thermosets—By Introducing Poly(ether nitrile ketone)s Containing Phthalazinone Structures

Guo

Wang

et al. 2023

Materials

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As high brittleness limits the application of all epoxy resins (EP), here, it can be modified by high-performance thermoplastic poly(ether nitrile ketone) containing phthalazinone structures (PPENK). Therefore, the influence of different PPENK contents on the mechanical, thermal, and low-temperature properties of EP was comprehensively investigated in this paper. The binary blend of PPENK/EP exhibited excellent properties due to homogeneous mixing and good interaction. The presence of PPENK significantly improved the mechanical properties of EP, showing 131.0%, 14.2%, and 10.0% increases in impact, tensile, and flexural strength, respectively. Morphological studies revealed that the crack deflection and bridging in PPENK were the main toughening mechanism in the blend systems. In addition, the PPENK/EP blends showed excellent thermal and low-temperature properties (−183 °C). The glass transition temperatures of the PPENK/EP blends were enhanced by approximately 50 °C. The 15 phr of the PPENK/EP blends had a low-temperature flexural strength of up to 230 MPa, which was 46.5% higher than EP. Furthermore, all blends exhibited better thermal stability.

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“…It is valuable to study the mechanical properties and failure mechanism of the 3D MWK carbon/epoxy composites at cryogenic temperature because of the wide potential applications in aerospace engineering. For example, the composite structure of a satellite in flight or a liquid nitrogen cryogenic tank may be exposed to temperatures below -196 o C, changes in the interior structure and mechanical response of composite materials may occur under such cryogenic conditions [21,22].…”

Section: Introductionmentioning

confidence: 99%

Mechanical response and failure of 3D MWK carbon/epoxy composites at cryogenic temperature

Duan

Jiang

et al. 2015

Fibers Polym

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Static tensile and bending experiments are conducted on 3D MWK carbon/epoxy composites with two types of fiber architecture at room and cryogenic temperature (low as -196 o C). Macro-Fracture morphology and SEM micrographs are examined to understand the deformation and failure mechanism. The results show that tensile stress vs. strain curves have linear elastic feature up to failure; while the load-deflection curves for composites with large fiber orientation angle have pronounced nonlinear and failure in steps. Meanwhile, tensile and bending properties at liquid nitrogen temperature have been improved significantly. Moreover, the properties can be affected greatly by the fiber architecture and these decrease with increasing fiber orientation angle at room and cryogenic temperatures. The results also show the damage and failure patterns of composites vary with the fiber architecture and temperature. The main failure for material A is 0 o fibers fracture and matrix cracking. The failure mechanism for material B is the delamination, 90 o /+45 o /-45 o fiber/matrix interface debonding and fibers tearing, as well as 0 o fibers' breakage. At cryogenic temperature, the matrix is solidified and the interfacial adhesion between fibers and matrix is enhanced significantly. However, the brittle failure becomes more obvious, more microcracks propagate and interpenetrate.

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Three-dimensional stress analysis of cracked satin woven carbon fiber reinforced/polymer composites under tension at cryogenic temperatures

Cited by 13 publications

References 16 publications

Synthesis and property evaluations of highly filled polyimide composites under thermal cycling conditions from −190 °C to +200 °C

Synthesis and property evaluations of highly filled polyimide composites under thermal cycling conditions from −190 °C to +200 °C

A New Strategy to Improve the Toughness of Epoxy Thermosets—By Introducing Poly(ether nitrile ketone)s Containing Phthalazinone Structures

Mechanical response and failure of 3D MWK carbon/epoxy composites at cryogenic temperature

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Three-dimensional stress analysis of cracked satin woven carbon fiber reinforced/polymer composites under tension at cryogenic temperatures

Cited by 13 publications

References 16 publications

Synthesis and property evaluations of highly filled polyimide composites under thermal cycling conditions from −190 °C to +200 °C

Synthesis and property evaluations of highly filled polyimide composites under thermal cycling conditions from −190 °C to +200 °C

A New Strategy to Improve the Toughness of Epoxy Thermosets—By Introducing Poly(ether nitrile ketone)s Containing Phthalazinone Structures

Mechanical response and failure of 3D MWK carbon/epoxy composites at cryogenic temperature

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Synthesis and property evaluations of highly filled polyimide composites under thermal cycling conditions from −190 °C to +200 °C

Synthesis and property evaluations of highly filled polyimide composites under thermal cycling conditions from −190 °C to +200 °C