Mechanical response of a unidirectional graphite fiber/polyimide composite as a function of temperature

Rupnowski, P.; Gentz, M.; Kumosa, M.

doi:10.1016/j.compscitech.2005.07.026

Cited by 30 publications

(18 citation statements)

References 33 publications

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“…To verify the effectiveness of the method cited above, several materials with different mechanical properties, which have been extracted from stress and strain curves produced by various research teams, are studied with the numerical method shown in Table III. [1][2][3][4][5][6][7]38,[41][42][43][44][45][46] The indentation procedures with two indenters, the halfincluded angles of which were 80°and 50°, respectively, are simulated with the finite element method, and the two indentation responses are obtained. The plastic properties of the indented materials are obtained using Eqs.…”

Section: A New Correction For Oandp's Methodsmentioning

confidence: 99%

A systematic study of the validation of Oliver and Pharr’s method

Shu

2007

J. Mater. Res.

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Oliver and Pharr’s method (O&P’s method) is an efficient and popular way of measuring the hardness and Young’s modulus of many classes of solid materials. However, there exists a range of errors between the real values and the calculated values when O&P’s method is applied to materials not included in the basic assumption proposed initially. In this article, the dimensional analysis theorem and the finite element method are applied to evaluate errors for high elastic (E/σY → 5) to full plastic (E/σY→ 1000) materials with different strain-hardening exponents from 0 to 0.5. A new method is proposed to correct errors obtained using O&P’s method. The numerical simulation results show that the errors obtained using O&P’s method, given in the form of charts, are mainly dependent on the ratio of the reduced Young’s modulus to the yield stress (i.e., Er/σY) and the strain-hardening exponent, n, for an indenter with a fixed included angle. The two mechanical properties, which can be extracted from the load–depth curves of two indenters with different included angles, are used to correct the errors in the hardness and Young’s modulus of the indented materials produced by O&P’s method.

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Section: A New Correction For Oandp's Methodsmentioning

confidence: 99%

A systematic study of the validation of Oliver and Pharr’s method

Shu

2007

J. Mater. Res.

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“…Unfortunately, there is still much more research required and all the underlying mechanisms for the predicting the behavior of these materials are yet to be determined. Characterizing the behavior of these materials is not trivial [27][28][29] and very timeconsuming and in some cases, reliable methods to determine certain properties do not yet exist.…”

Section: Effect Of Oxidationmentioning

confidence: 99%

Analysis of Textile Composite Structures Subjected to High Temperature Oxidizing Environment

Whitcomb¹

2010

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This research work has contributed in various ways to help develop a better understanding of textile composites and materials with complex microstructures in general. An instrumental part of this work was the development of a framework that made it convenient to perform multiscale/multiphysics analyses of advanced materials such as textile composites with complex microstructures. In addition to the studies conducted in this work, this framework lays the groundwork for continued research of these materials. In addition to implementing an oxidation model, the framework was also used to implement strategies that expedited the simulation of oxidation in textile composites so that it would take only a few hours instead of impractically long times. Finally, a coupled diffusion/oxidation and damage progression analysis was implemented that was used to study the mechanical behavior of textile composites under mechanical loading as well as oxidation.

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“…Over the years, thermo‐mechanical behaviors of composites at thermal environments have been studied and investigated . Dimitrienko analyzed effects of temperatures and heating rates on thermal properties of matrixes, fibers and composites through thermal experiments and theoretical model, and concluded that the higher the heating rate for heated composites to the same temperature, the smaller the decrease of thermal properties of composites.…”

Section: Introductionmentioning

confidence: 99%

Residual strength and damage mechanisms of laminated carbon fiber reinforced polymer under thermal environments and laser irradiations

Zhao

Huang

Song

et al. 2018

Polymer Engineering & Sci

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It is interesting to compare the residual strength of laminated carbon fiber reinforced polymer under thermal environments with finite heating rate, and laser irradiation with rapid heating rate. In these two conditions, heating rates are varied in two orders of magnitude, and thermally-induced damage mechanisms are quite different, which may influence the performance of residual strength. Systematic experiments are performed to obtain the tensile failure behavior of laminated carbon fiber reinforced epoxy composites at different temperatures with a heating rate of about 10 2 8C/min. In comparison, composite samples are subjected to laser irradiations of different power densities and then tested for residual strengths, the laser induced heating rate is above 10 4 8C/min. Experimental results indicate that the residual strength decreases with the increase of heating temperatures and laser power densities, however the damage mechanisms for conventional heating are thermal pyrolysis, oxidation and delamination, whereas the main damage mechanisms for laser irradiation are thermal pyrolysis and fiber ablation. The experimentally obtained residual strength and modulus are also compared with those predicted by theoretical model. POLYM. ENG. SCI., 00:000-000,

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Mechanical response of a unidirectional graphite fiber/polyimide composite as a function of temperature

Cited by 30 publications

References 33 publications

A systematic study of the validation of Oliver and Pharr’s method

A systematic study of the validation of Oliver and Pharr’s method

Analysis of Textile Composite Structures Subjected to High Temperature Oxidizing Environment

Residual strength and damage mechanisms of laminated carbon fiber reinforced polymer under thermal environments and laser irradiations

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