The role of intralaminar damages on the delamination evolution in laminated composite structures

Russo, Angela; Palumbo, Concetta; Riccio, Aniello

doi:10.1016/j.heliyon.2023.e15060

Cited by 9 publications

(5 citation statements)

References 21 publications

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“…The consequences of impacts with low velocities (stones from the airfield pavement, hail, birds, falling tools, etc.) or pressure pulses are more diverse [38][39][40] (Figure 3c,d). All of these cases are accompanied by delaminations.…”

Section: Percussion Loadsmentioning

confidence: 99%

“…This does not always lead to failure, but it can degrade the performance of the product [23,30]. The literature on delamination stability in rods, plates and shells is analyzed in [23,32,38]. In this review, we will focus on the general characterization of approaches, and some of the stability problems and critical behavior that are characteristic of composites.…”

Section: Processes Of Delamination Growthmentioning

confidence: 99%

“…Delaminations that are anisotropic [25,38,39] have initial deflections due to residual stress, impact [15,61,72] or heating [17,30], and delaminations with incisions (which are "pocket-like") [65,66] bulge out without bifurcations under compression or shear pressure.…”

Section: Delamination Resistancementioning

confidence: 99%

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A Review of Delamination Damage of Composite Materials

Huang,

Bobyr

2023

J. Compos. Sci.

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The theoretical and practical achievements in the field of the theory of strength and reliability of composite materials are discussed in a review conducted on the scientific research conducted on the effect of delamination on the reliability and quality of composites. The methodological aspects of the stability of the mechanical characteristics of composite materials under the combined action of cyclic and impact loads are examined, as are the manufacturing and processing technologies. The reasons for delamination, such as technological, manufacturing and application, free edge, joints and loads, are revealed. The influence of delamination on the bearing capacity of structural elements made of composite materials is analyzed. The mechanism of delamination growth is outlined, and the criteria and processes are defined, such as the growth of delamination cracks in a multidirectional laminated plate from a straight edge, edge delamination during plate bending, delamination in plates in the field of residual stresses, etc. The importance of taking into account the visco-plastic effect at the top of the edge crack of delamination of composite materials is emphasized. The concept of critical delamination behavior is characterized, and the issues of delamination stability are described.

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Section: Percussion Loadsmentioning

confidence: 99%

Section: Processes Of Delamination Growthmentioning

confidence: 99%

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A Review of Delamination Damage of Composite Materials

Huang,

Bobyr

2023

J. Compos. Sci.

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“…The abovementioned equations ( 18) to (21) give the generation of the adiabatic temperature and its effect on stress. Next, it is needed to consider the relationship between strength and thermomechanical coupling.…”

Section: Thermomechanical Couple Effectmentioning

confidence: 99%

“…2,20 Therefore, in addition to considering the thermomechanical coupling effect of instantaneous impact temperature generation at high strain rate, the initial nonlinear effect at a low strain rate also needs to be considered in order to form a complete and accurate mechanical behavior of CFRP. Although there are other problems to consider for the CFRP laminates, such as intralaminar damage, delamination evolution, microscopic failure modes, 21,22 etc., the present paper focuses only on the macroscopic thermomechanical coupling problems related to strain rate and temperature rise. From the above studies, the instantaneous impact temperature generation of fiber-reinforced plastics commonly exists and has a higher value of 24-252 C. However, the effect on mechanical behavior by this temperature is rare to be discussed.…”

Section: Introductionmentioning

confidence: 99%

Complete constitutive model of CFRP including continuous damage in low strain rate compression and temperature generation in high strain rate impact

Zhao,

Zhong,

Wang

et al. 2023

Polymer Composites

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This paper reports a method to construct the complete constitutive model of carbon fiber‐reinforced plastic (CFRP) by distinguishing the strain rate state and modifying the material stiffness. In quasistatic (low strain rate) compression, the initial nonlinear effect caused by the material defects was described by introducing an nonlinear increasing factor. In dynamic (high strain rate) impact, the nonlinear strengthening effect was described by introducing the dynamic amplification factors of stress and strain based on the reference state. Considering the instantaneous temperature rise obtained from the impact work–temperature generation equation and the influence of temperature on modulus and strength, the coupled thermomechanical constitutive models combining the strain rate effect and the temperature effect were established. The user‐defined material subroutines (VUMAT) were developed, and then these constitutive models were verified by finite element analysis (FEA). Finally, the developed material subroutine was applied to predict the impact penetration of CFRP laminates, and the results show that the opening holes, damage and energy dissipation are in good agreement with the reference experiment. This work comprehensively analyzed the construction method of CFRP constitutive models, which would provide a guidance for the coupled thermomechanical behavior under dynamic impact.Highlights An anisotropic continuum mechanical constitutive behavior considering strain rate effect and damage evolution behavior was established. A macroscopic anisotropic constitutive model including the coupled impact temperature generation‐mechanical behavior was established. Combined with the incremental finite element method, the three‐dimensional user‐defined material subroutines (VUMAT) were developed and verified. The thermomechanical impact penetration behaviors of CFRP laminates was predicted, and the stress field, temperature field and failure characteristics were visualized.

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