Matrix cracking and stiffness reduction during the fatigue of a (0/90)s GFRP laminate

Ogin, S.L.; Smith, PA; Beaumont, Pwr

doi:10.1016/0266-3538(85)90088-0

Cited by 232 publications

(81 citation statements)

References 2 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…(6) establishes a stiffness-based design criterion since for a predetermined value of p= ( ) 1 , one can solve for σ a to obtain design curve corresponding not to material failure but to a specific stiffness degradation percentage (1 − )%.…”

Section: Stiffness Degradationmentioning

confidence: 99%

“…Under cyclic loading, the formation of matrix cracks is the beginning of a complex process of interrelated damage events. These may include sequential initiation and accumulation of multiple cracks in all off-axis plies, local interfacial delamination and fibre breakage, which ultimately determine the stiffness degradation, residual strength and lifetime of a given laminate [1,2].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Experimental Studies of Stiffness Degradation and Dissipated Energy in Glass Fibre Reinforced Polymer Composite under Fatigue Loading

Cadavid

Al-Khudairi

Hadavinia

et al. 2017

Polymers and Polymer Composites

View full text Add to dashboard Cite

In this work tensile and compressive properties and fatigue performances of laminated glass fibre reinforced polymer (GFRP) composite under constant amplitude sinusoidal waveform load control at frequency of 5 Hz and at room temperature were investigated for three different types of loading: tension-tension at R= 0.1 and 0.5, reverse loading tensioncompression at R= −1 and compression-compression at R= 2 and 10 in fibre and normal to fibre directions. From these series of tests, the corresponding S-N diagrams are obtained.The dynamic stiffness during fatigue loading has shown classical degradation of the GFRP laminates. It is observed that the dynamic modulus decreases with time and the hysteresis loop area changes with some distortion according to the loading condition. Finally hysteresis loops throughout fatigue testing were examined and the variation of energy dissipated per cycle throughout the specimen lifetime was quantified. It is demonstrated that the dissipated energy during the fatigue lifetime is dependent on R-ratio and fibre orientation.However, in majority of the cases, the energy dissipated per cycle near the end of the fatigue lifetime increases as a result of an increase in the area captured by hysteresis loops.

show abstract

Section: Stiffness Degradationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Experimental Studies of Stiffness Degradation and Dissipated Energy in Glass Fibre Reinforced Polymer Composite under Fatigue Loading

Cadavid

Al-Khudairi

Hadavinia

et al. 2017

Polymers and Polymer Composites

View full text Add to dashboard Cite

show abstract

“…In the present review, Berthelot complete parabolic shear-lag model is used [12], which means a parabolic variation of axial displacement is introduced for both 0-and 90-degree layers (see (1a)-(1b)). Then, corresponding stress functions are obtained, which ultimately translate into stress accumulation and degradation mechanical properties, particularly stiffness [13]. Another family of micromechanical approaches is proposed by Hashin [14] who proposes a variational stressperturbation function, departing from crack-free stress state.…”

Section: Introductionmentioning

confidence: 99%

“…Finally, these stresses have an effect on the material, which is reflected in degradation rules such as the stiffness reduction formula obtained by Ogin [13]:…”

Section: Modelsmentioning

confidence: 99%

Micromechanics of Cracked Laminates under Uniaxial Load: A Comparison between Approaches

Rivera-Santana

Guevara-Morales

Figueroa-López

2017

Advances in Materials Science and Engineering

View full text Add to dashboard Cite

This paper compares stiffness degradation models of cross-ply glass fiber/epoxy laminates based on four of the most commonly used approaches to micromechanical modelling: shear-lag, variational, McCartney, and synergistic damage mechanics (SDM). All of these include the process of defining [0/90] s laminate unit cell, from which governing differential equations and corresponding boundary conditions are stated. Afterwards, these boundary value problems (BVP) are solved in order to obtain a stress function which couples the initial and perturbation stresses, the latter being in function of crack density, thus related to material stiffness reduction. When compared against experimental results, shear-lag model presented accurate results however, additional differentiation and integration steps were required in order to obtain the final stress field. Hashin's variational method predicts correctly the boundary conditions at crack surfaces and gives out the complete stress field. McCartney's approach shows further improvement over the previous two models, taking into account thermal strains and stresses. Finally, SDM, which is designed for numerical experimentation, implying a more economical alternative in comparison to traditional physical experimentation, also presented very good agreement with experimental results and can be extended to arbitrary laminate stackings, going beyond the classical cross-ply.

show abstract

“…In particular, stiffness degradation due to matrix cracking is a significant indication of damage [4][5][6] and the measurement of matrix crack density is important in the prediction of residual life. It is often desirable to evaluate such damage in the material nondestructively.…”

Section: Introductionmentioning

confidence: 99%

Real-Time Monitoring of Damage Development in Crossply Composite Laminates by Means of Ultrasonic and Acoustic Emission Methods

Wooh

Daniel

Chun

1995

Review of Progress in Quantitative Nondestructive Evaluation

View full text Add to dashboard Cite

Matrix cracking and stiffness reduction during the fatigue of a (0/90)s GFRP laminate

Cited by 232 publications

References 2 publications

Experimental Studies of Stiffness Degradation and Dissipated Energy in Glass Fibre Reinforced Polymer Composite under Fatigue Loading

Experimental Studies of Stiffness Degradation and Dissipated Energy in Glass Fibre Reinforced Polymer Composite under Fatigue Loading

Micromechanics of Cracked Laminates under Uniaxial Load: A Comparison between Approaches

Real-Time Monitoring of Damage Development in Crossply Composite Laminates by Means of Ultrasonic and Acoustic Emission Methods

Contact Info

Product

Resources

About