Dynamic response of composite laminated beams under asynchronous/repeated low-velocity impacts of multiple masses

Sisi, M. Kavousi; Shakeri, M.; Sadighi, Mojtaba

doi:10.1016/j.compstruct.2015.06.072

Cited by 15 publications

(4 citation statements)

References 40 publications

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“…The damage caused by dynamic loading (fatigue/cyclic) in composites is very complex because of their anisotropy and develop stress gradients in the structure. 1 This sort of damage is distributed throughout the specimen leading to performance degradation. The flowing section presents the evaluation of composite response on loading in terms of flexural modulus, acoustic emission (AE) 2–4 and thermography.…”

Section: Introductionmentioning

confidence: 99%

“…11 Furthermore, the visco-elastic nature of the polymer resin combined with load rate has the potential to change the failure mode from fibre to the matrix. 1,12,13 At a high strain rate, the damage propagation is faster, which leads to lower strain to failure exhibiting matrix dominant brittle failure. 1,14 Often the damage pattern of composites is quite complex and comprises sequential occurrences of matrix cracking/crazing (MC), fibre-matrix debonding, delamination (D/D), and finally fibre failure (FF).…”

Section: Introductionmentioning

confidence: 99%

“…1,12,13 At a high strain rate, the damage propagation is faster, which leads to lower strain to failure exhibiting matrix dominant brittle failure. 1,14 Often the damage pattern of composites is quite complex and comprises sequential occurrences of matrix cracking/crazing (MC), fibre-matrix debonding, delamination (D/D), and finally fibre failure (FF). The intrinsic evaluation of such damages is effectively done by techniques like Acoustic Emission 15 and thermography in both in situ and ex-situ conditions.…”

Section: Introductionmentioning

confidence: 99%

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Structural integrity evaluation of cyclic loading Glass Fibre Reinforced Polymer composite by acoustic emission and heat transfer

Govindaraman¹,

Kalidas²,

Bari

et al. 2022

Journal of Composite Materials

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GFRP composites experience structural changes like matrix cracking, debonding, delamination, and fibre failure on static and dynamic loading. In this work, composites with varying fibre orientation interaction angle and volume fractions are prepared and exposed to cyclic load. The cyclic load (R = 0) is a constant amplitude flexural load imposed on the cantilever beam specimen with varying frequencies (2.6, 4.6, 8.6 Hz) and cycles (up to 44 × 103). The structural integrity of the specimens on loading is examined in terms of Flexural, modulus, Acoustic Emission (AE) and heat transfer changes. The drop in flexural modulus is minimum in higher Vf = 32% laminate (A1 = 7.01%, B1 = 1.86%) than the lower Vf = 25% (A2 = 19.86%, B2 = 8.6%). The observed AE peak frequency for the induced damages is in the range of 50–100, 110–230, 245–380 kHz. The drop-in fibre volume fraction has a significant role in laminate with lower fibre interaction (Type A) to offer minimum variation (5.25%) in AE activity count which is the opposite in laminates with higher fibre interaction angle (31.75%). The step heat thermography exhibits minimum temperature difference (∆T) for moderate loading frequency and in a few cases, ∆T drops well below the virgin, insisting on in situ thermography to study the dynamic changes in composites. A fibre dominant behaviour can be observed with minimum variation in AE activity in a lower fibre interaction angle. Thus, the fibre orientation angle and fibre volume fraction have a significant role in the retention of the structural integrity of composites in dynamic loading.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Structural integrity evaluation of cyclic loading Glass Fibre Reinforced Polymer composite by acoustic emission and heat transfer

Govindaraman¹,

Kalidas²,

Bari

et al. 2022

Journal of Composite Materials

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“…A so called perfect component without any flaws, which is just produced, may not remain the same by the time it reaches the consumer. A lot of study is available in literature which evaluates the performance of composites under lateral loading having simple geometries like plates and beams [6,7]. The behavior of cylindrical components made of composite materials under lateral loads has received less focus.…”

Section: Introductionmentioning

confidence: 99%

Comparative Damage Analysis of Impact Induced Traditional and Graded Filament Wound Glass Fiber/Epoxy Composite Pipes

Ahankari¹,

Suryawanshi

Warerkar

2018

MSF

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Epoxy-glass fiber composite pipes were fabricated with filament winding machine. Full automation and precise control over the processing parameters are the major advantages of this manufacturing technique. Stacking sequence is one of the important processing parameters on which the properties of filament wound components depend to a large extent. This paper comes up with a comparative damage analysis of traditional composite pipes (TCPs) of stacking sequence [±55]6, and functionally graded composite pipes (FGCP) of stacking sequence [70-55-40-40-55-70]. The stacking sequence in FGCP was chosen such that the average stacking angle is retained the same as of TCPs, i.e. [±55]. An impact analysis of these pipes was carried out. Impact energy of 45 J was applied on both pipes and damage was quantified using back-lighting technique. It was observed that the damage occurred in FGCPs was 30% lesser compared to TCPs.

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Nonlinear low-velocity impact on damped and matrix-cracked hybrid laminated beams containing carbon nanotube reinforced composite layers

Fan

Wang

2017

Nonlinear Dyn

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Dynamic response of composite laminated beams under asynchronous/repeated low-velocity impacts of multiple masses

Cited by 15 publications

References 40 publications

Structural integrity evaluation of cyclic loading Glass Fibre Reinforced Polymer composite by acoustic emission and heat transfer

Structural integrity evaluation of cyclic loading Glass Fibre Reinforced Polymer composite by acoustic emission and heat transfer

Comparative Damage Analysis of Impact Induced Traditional and Graded Filament Wound Glass Fiber/Epoxy Composite Pipes

Nonlinear low-velocity impact on damped and matrix-cracked hybrid laminated beams containing carbon nanotube reinforced composite layers

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