Low velocity impact and compression after impact simulation of thin ply laminates

Soto, A.; González, E.V.; Maimí, P.; Escalera, Federico Martín de la; Aja, J.R. Sainz de; Álvarez, Esteban Cañibano

doi:10.1016/j.compositesa.2018.03.017

Cited by 110 publications

(46 citation statements)

References 62 publications

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“…The open research literature shows that the reduction in ply thickness can significantly improve both the initial and ultimate strengths of multidirectional laminates under tensile loads [1][2][3][4][5][6][7][8][9]. In open-hole tests of laminates, thin-ply composites can obtain a higher initial damage strength under a quasi-static tension and a longer fatigue life under tensile cyclic loads [2,6,7]. In bolted assemblies, the bearing strength is also improved, especially in hot and humid environments [6].…”

Section: Introductionmentioning

confidence: 99%

“…In open-hole tests of laminates, thin-ply composites can obtain a higher initial damage strength under a quasi-static tension and a longer fatigue life under tensile cyclic loads [2,6,7]. In bolted assemblies, the bearing strength is also improved, especially in hot and humid environments [6]. In the case of CAI (compression after impact), thin-ply composites provided an optimizing design method to achieve an increased residual strength, although the thinnest part did not necessarily provide optimized results [2,6].…”

Section: Introductionmentioning

confidence: 99%

“…In bolted assemblies, the bearing strength is also improved, especially in hot and humid environments [6]. In the case of CAI (compression after impact), thin-ply composites provided an optimizing design method to achieve an increased residual strength, although the thinnest part did not necessarily provide optimized results [2,6].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Mechanical Properties of Thin-Ply Composites Based on Acoustic Emission Technology

Zheng

Cao

et al. 2021

Materials

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Compared with standard-ply composites, thin-ply composites exhibit a superior mechanical performance under various operating conditions due to their positive size effects. Thin-ply laminate failure modes, including matrix initial damage (MID), matrix failure (MF), and fiber failure (FF), have been distinguished through a systematic acoustic emission (AE) signals analysis combined with scanning electron microscopy (SEM). First, the characteristic frequencies of various failure modes are identified based on unidirectional laminates ([90] 68 and [0] 68). Then, according to the identified frequencies corresponding to distinctive damage modes, four lay-up sequences (02[[90m/0m]ns]02, m = 1, 2, 4, 8, n × m = 16) with a constant total thickness are designed, and the effects of the number of identical plies in the laminate thickness on the damage evolution characteristics and the damage process under uniaxial tension loads are dynamically monitored. The obtained results indicate that the characteristic frequency ranges for MID, MF, and FF are identified as 0–85 kHz, 165–260 kHz, and 261–304 kHz, respectively. The thickness of identical plies has a significant effect on onset damage. With the decrease of the number of identical plies (i.e., m in the stacking sequences), the thin-ply laminates exhibit the initiation of damage suppression effects and crack propagation resistance.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Mechanical Properties of Thin-Ply Composites Based on Acoustic Emission Technology

Zheng

Cao

et al. 2021

Materials

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“…The models were modified (as described in later sections) from their original versions to improve their ability to accurately predict damage initiation and evolution under general loading conditions while maintaining the model complexity and, therefore, the computational cost. The current work serves as basis for modelling more complex geometries [24][25][26] and can potentially be used for the generation of statistically based design allowables for the most simple test cases when allied with powerful statistical tools.…”

Section: Introductionmentioning

confidence: 99%

Simulation of failure in laminated polymer composites: Building-block validation

Furtado

Catalanotti

Arteiro

et al. 2019

Composite Structures

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The development of numerical tools to complement the experimental determination of structural design parameters is of key importance to hasten the certification process of new materials and structures. In this work, a methodology to simulate elastic and inelastic deformation of composite laminates at the subcomponent level based on finite element analysis is proposed. A modified version of a continuum damage model proposed in the literature combined with a frictional cohesive zone model is used to capture the intralaminar and interlaminar damage and failure of composite laminates in general loading conditions. The methodology is validated for three aerospace-grade carbon fibre reinforced (epoxy) polymer composite material systems and coupon configurations with increasing level of complexity, including unnotched tension/compression, open-hole tension/compression and filled hole compression. The predictions obtained are in good agreement with the experimental results for all the test cases, oftentimes within standard error of the tests, with maximum relative error of 13%.

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“…Besides, the impact damage mechanism of thick laminates is different from that of thin laminates. Soto et al 35 point out that thicker laminates lead to larger delaminations while thinner laminates lead to more fiber breakage during an LVI event. This is because in thin laminates, fiber breakage becomes more relevant while matrix cracking effects can be assumed negligible and the consequent induced delamination is practically suppressed.…”

Section: Introductionmentioning

confidence: 99%

Investigation of damage to thick composite laminates under low-velocity impact and frequency-sweep vibration loading conditions

Duan

Yue

Song³

2014

Advances in Mechanical Engineering

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A detailed investigation of damage and failure mechanisms of composite laminates under low-velocity impact (LVI) by experimental tests and numerical modeling is presented. Five impact energy levels were investigated on composite laminates by drop-weight tests. Permanent indentations were measured, and delamination areas of each interface induced by each LVI event were captured using an ultrasonic C-scan. The 3D volume elements with a user-defined, material-based finite element model (FEM) has been applied to predict the LVI event considering damage modes, including intra-ply damage and inter-ply damage. The results of the FEM were found to agree well with experimental observations. Internal damage of the laminate during the impact process was analyzed. For thick laminates, the initiation of damage is observed at the first layer, and then spreads from the impact surface to the back, leading to a pine-type damage pattern as the thickness increases. Frequency-sweep vibration tests of composite laminates subjected to LVI events were studied under a “fixed ends” boundary condition. Our results show that it is reasonable to use frequency-sweep vibration experiments to evaluate the damage of laminates subjected to LVI events.

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Low velocity impact and compression after impact simulation of thin ply laminates

Cited by 110 publications

References 62 publications

Mechanical Properties of Thin-Ply Composites Based on Acoustic Emission Technology

Mechanical Properties of Thin-Ply Composites Based on Acoustic Emission Technology

Simulation of failure in laminated polymer composites: Building-block validation

Investigation of damage to thick composite laminates under low-velocity impact and frequency-sweep vibration loading conditions

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