Low-velocity impact predictions of composite laminates using a continuum shell based modeling approach part A: Impact study

Thorsson, Solver I.; Waas, Anthony M.; Rassaian, Mostafa

doi:10.1016/j.ijsolstr.2018.07.020

Cited by 62 publications

(21 citation statements)

References 30 publications

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“…Compared to the expensive and time-consuming testing, finite element (FE) techniques provide the great opportunity to establish a numerical model, which could accurately perform the impact events and predict the complicated behaviors of the composites under repeated low-velocity impact in a relatively short time. The enhanced Schapery theory (EST) [9] can be used as the intra-laminar constitutive model to capture the prepeak and post-peak behavior of a unidirectional lamina, which has been successfully applied to numerical simulation of lowvelocity impact on composites [10,11,12,13]. The progressive damage model (PDM), which considers damage initiation and subsequent stiffness degradation, has become the most popular numerical model to predict the different modes of damage for composites [14,15,16,17,18,19,20,21,22,23,24].…”

Section: Introductionmentioning

confidence: 99%

Numerical investigation on the repeated low-velocity impact behavior of composite laminates

Zhou

Wen

Wang

2020

Composites Part B: Engineering

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The dynamic mechanical responses and damage development of cross-ply composite laminates under repeated low-velocity impact are investigated through finite element simulations with ABAQUS/Explicit. A progressive damage model for laminates, consisting of the continuum damage model, the 3D Hashin failure criterion and the damage evolution model based on equivalent displacement, is integrated with the bilinear traction-separation relationship cohesive model to simulate the damage initiation, evolution and propagation behavior of different damage modes in composite laminates. Compared with the experimental results, the established finite element model was validated through the global mechanical response and damage distribution contous. Besides, a mesh refinement study was performed by using three different element sizes. The validated model was adopted to investigate the repeated impact behaviors of composite laminates under three different energies. The qualitative conclusions about the effects of repeated impact on global mechanical response were summarized by the changes of impact force, displacement, contact time and energy absorption. Moreover, the effects of repeated impact on the damage characteristics and expansions of matrix and delamination were discussed in detail.

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Section: Introductionmentioning

confidence: 99%

Numerical investigation on the repeated low-velocity impact behavior of composite laminates

Zhou

Wen

Wang

2020

Composites Part B: Engineering

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“…Composites are widely used in the fields of aviation and spaceflight because of their excellent specific strength and modulus. However, they are very sensitive to low-velocity impact damage, causing a potential threat as barely visible impact damage (BVID) [1,2,3], which is defined as impacts that show minimal surface damage but which can cause the internal structure to suffer a complex failure [4]. In addition, BVID can reduce the residual strength of the structure significantly [5].…”

Section: Introductionmentioning

confidence: 99%

Low-Velocity Impact Behavior of Interlayer/Intralayer Hybrid Composites Based on Carbon and Glass Non-Crimp Fabric

Zhang

Rao

et al. 2018

Materials

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Composites have gained wide use in structural applications; however, they are sensitive to impact damage. The use of hybrid composites is an effective way to overcome this deficiency. The effects of various hybrid structures of interlayer and intralayer warp-knitted fabrics with carbon and glass fibers on the low-velocity impact behavior of composite laminates were studied. Drop-weight impact tests were conducted on two types of interlayer, sandwich and intralayer hybrid composite laminates, which were compared with homogenous composite laminates. During low-velocity impact tests, the time histories of impact forces and absorbed energy by laminate were recorded. The failure modes were analyzed using the micro-CT (computed tomography) and C-scan techniques. The results revealed that the hybrid structure played an important role in peak force and the absorbed energy, and that the hybrid interface had an influence on damage modes, whereas the intralayer hybrid composite laminate damage was affected by the impact location. The intralayer hybrid laminate with C:G = 1:1 exhibited better impact resistance compared to the other hybrid structures.

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“…There are two main methods for studying the lowvelocity impact of composite structures: mechanical tests and numerical simulations [7][8][9][10][11][12][13][14]. Common impact tests include drop-weight impact tests (ASTM D7136), Izod and Charpy impact tests (ASTM D256) and pendulum impact tests (ASTM D6110), among which the drop-weight impact method is most widely used.…”

Section: Introductionmentioning

confidence: 99%

Simulations and Tests of Composite Marine Structures Under Low-Velocity Impact

Zhu

Chen

et al. 2021

Polish Maritime Research

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Due to their excellent performance, composite materials are increasingly used in the marine field. It is of great importance to study the low-velocity impact performance of composite laminates to ensure the operational safety of composite ship structures. Herein, low-velocity drop-weight impact tests were carried out on 12 types of GRP laminates with different layup forms. The impact-induced mechanical response characteristics of the GRP laminates were obtained. Based on the damage model and stiffness degradation criterion of the composite laminates, a low-velocity impact simulation model was proposed by writing a VUMAT subroutine and using the 3D Hashin failure criterion and the cohesive zone model. The fibre failure, matrix failure and interlaminar failure of the composite structures could be determined by this model. The predicted mechanical behaviours of the composite laminates with different layup forms were verified through comparisons with the impact test results, which revealed that the simulation model can well characterise the low-velocity impact process of the composite laminates. According to the damage morphologies of the impact and back sides, the influence of the different layup forms on the low-velocity impact damage of the GRP laminates was summarised. The layup form had great effects on the damage of the composite laminates. Especially, the outer 2‒3 layers play a major role in the damage of the impact and the back side. For the same impact energy, the damage areas are larger for the back side than for the impact side, and there is a corresponding layup form to minimise the damage area. Through analyses of the time response relationships of impact force, impactor displacement, rebound velocity and absorbed energy, a better layup form of GRP laminates was obtained. Among the 12 plates, the maximum impact force, absorbed energy and damage area of the plate P4 are the smallest, and it has better impact resistance than the others, and can be more in line with the requirements of composite ships. It is beneficial to study the low-velocity impact performance of composite ship structures.

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Low-velocity impact predictions of composite laminates using a continuum shell based modeling approach part A: Impact study

Cited by 62 publications

References 30 publications

Numerical investigation on the repeated low-velocity impact behavior of composite laminates

Numerical investigation on the repeated low-velocity impact behavior of composite laminates

Low-Velocity Impact Behavior of Interlayer/Intralayer Hybrid Composites Based on Carbon and Glass Non-Crimp Fabric

Simulations and Tests of Composite Marine Structures Under Low-Velocity Impact

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