On the validity of the J-integral as a measure of the transverse intralaminar fracture energy of glass fiber-reinforced polyurethanes with nonlinear material behavior

Montenegro, Davi M.; Canal, Luis P.; Botsis, J.; Zogg, Markus; Studart, André R.; Wegener, Konrad

doi:10.1016/j.ijsolstr.2018.01.019

Cited by 13 publications

(3 citation statements)

References 30 publications

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“…Six biological models are extracted based on a broad range of biological organisms over micro- and meso-scales. The presented analysis of biological mechanisms is from a biological systems perspective, and it is hypothesized that the six bionic models are of significant potential in achieving high strength and toughness, owing to intrinsic composite structures [ 13 , 77 ]. By providing detailed analysis of the strengthening and toughening mechanisms for the structure elements in biological models, the effectiveness of using the bionic models for increasing strength and toughness are seen.…”

Section: Discussionmentioning

confidence: 99%

Bending Study of Six Biological Models for Design of High Strength and Tough Structures

Chen

Lin²,

Guo³

et al. 2022

Biomimetics

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High strength and tough structures are beneficial to increasing engineering components service span. Nonetheless, improving structure strength and, simultaneously, toughness is difficult, since these two properties are generally mutually exclusive. Biological organisms exhibit both excellent strength and toughness. Using bionic structures from these biological organisms can be solutions for improving these properties of engineering components. To effectively apply biological models to design biomimetic structures, this paper analyses strengthening and toughening mechanisms of six fundamentally biological models obtained from biological organisms. Numerical models of three-point bending test are established to predict crack propagation behaviors of the six biological models. Furthermore, the strength and toughness of six biomimetic composites are experimentally evaluated. It is identified that the helical model possesses the highest toughness and satisfying strength. This work provides more detailed evidence for engineers to designate bionic models to the design of biomimetic composites with high strength and toughness.

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Section: Discussionmentioning

confidence: 99%

Bending Study of Six Biological Models for Design of High Strength and Tough Structures

Chen

Lin²,

Guo³

et al. 2022

Biomimetics

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“…Montenegro et al [17] calculated the J-Integral in orthotropic materials using the contour integral approach, and reported that a convergence on the predictions is obtained only if the integration path is taken far enough from the crack tip location. The authors also pointed out that one of the biggest advantages in using J-Integral is that knowing the exact crack tip location is not a strict requirement.…”

Section: Introductionmentioning

confidence: 99%

Experimental determination of mode I fracture parameters in orthotropic materials by means of Digital Image Correlation

Cappello

Pitarresi

Xavier

et al. 2020

Theoretical and Applied Fracture Mechanics

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The mode I fracture parameters for an orthotropic body are directly calculated from full-field deformation measurements provided by Digital Image Correlation (DIC). Three complementary and direct approaches are evaluated and compared: i) the determination of the Stress Intensity Factor (SIF) by fitting the displacement field using the analytical expression proposed by Lekhnitskii; ii) the determination of the J-Integral by using the Energy Domain Integral (EDI) formulation on the raw DIC data; and iii) the calculation of the J-Integral using the EDI approach on the displacement data fitted using Lekhnitskii's formulation. A comparative experimental study is performed by testing an IM7/8552 cross-ply laminate, and the effect of different parameters is analysed and discussed. The outcomes of this work show that, if an accurate choice of the parameters is performed, the different approaches lead to the same results.

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“…Also, the accuracy of COD relies greatly on the precise location of the crack tip and may involve average of several measured values. Boothman et al applied J ‐integral to evaluate the local damage of large marine structures; Liu et al extracted the elastoplastic toughness of 15Cr‐5Ni stainless steel during phase transformation using J ‐integral; Montenegro et al studied the nonlinear mechanical behavior of the fracture energy of the glass fiber reinforced polyurethane transverse plate with J ‐integral, and Tracy et al used J ‐integral to evaluate the fracture toughness of ceramic matrix composites.…”

Section: Introductionmentioning

confidence: 99%

DIC‐based J‐integral evaluation of laser repaired cracks with micro/nanomaterial addition

Yinyin

Jiang

2019

Fatigue Fract Eng Mat Struct

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Cracks generated by a wire electric discharge machining on compact tension specimens are first repaired by high powered laser beam with different weight fractions of nano‐WC added at the crack tip. Digital image correlation method combined with J‐integral theory is used to measure and calculate J‐integrals of the repaired specimens. Fracture properties of the repaired specimens are compared and studied. The residual stress of specimens after being repaired by laser was also studied to analyze the feasibility of J‐integral to evaluate the fracture properties of the repaired parts. It is found that the influence of residual stress can be neglected when calculating J‐integral in a certain region in case of when the residual stress is small. The J‐integral obtained by the digital image correlation measurement is accurate and can effectively evaluate repairing effects. The paper provides guidance for laser repaired cracks with nanomaterial addition and an effective method for the evaluation of repairing effect.

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On the validity of the J-integral as a measure of the transverse intralaminar fracture energy of glass fiber-reinforced polyurethanes with nonlinear material behavior

Cited by 13 publications

References 30 publications

Bending Study of Six Biological Models for Design of High Strength and Tough Structures

Bending Study of Six Biological Models for Design of High Strength and Tough Structures

Experimental determination of mode I fracture parameters in orthotropic materials by means of Digital Image Correlation

DIC‐based J‐integral evaluation of laser repaired cracks with micro/nanomaterial addition

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