Optimization of transparent laminates for specific energy dissipation under low velocity impact using genetic algorithm

Antoine, G.O.; Batra, R.C.

doi:10.1016/j.compstruct.2014.12.066

Cited by 9 publications

(7 citation statements)

References 30 publications

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“…The soft body is modeled by *MAT PLASTICITY KINEMATIC material, where material parameters are got from the literature , shown in Table . As to the PC materials, a constitutive model widely used for impact issues was proposed by Mulliken and Boyce , which consists of parallel decoupled α‐and β‐process elastic‐viscoplastic parts connected with a Langevin spring, and was developed by Varghese and Batra , who considered the effects of current strain rate and temperature on elastic modulus and improved the softening behavior through incorporation of two extra internal variables. Even though these models perform advantages on the description for viscoplasticity of polymer materials, their capabilities for modeling viscoelasticity is weak because viscosity is neglected at elastic phase.…”

Section: Numerical Simulationmentioning

confidence: 99%

“…The topics on mechanical properties of these kinds of laminated sandwish plates against impact are attractive to researchers . Particularly, the systematic work has been contributed by Antoine et al . They built a 3D model to investigate the transient response of displacement and reaction force, delamination and crack modes of laminated composite sheets which consists of PMMA/adhesive/PC against the low speed impact by a hemispherical nosed steel projectile, mathematically and computationally.…”

Section: Introductionmentioning

confidence: 99%

“…They further employed the genetic algorithm coupling FEM to maximize the dissipated energy at each layer of polymeric laminate in order to design the most effective construction of a 12‐layer laminated plate under strike. The best configuration is built by putting PC materials at 1,3 and 12 layers, where the dominant plastic deformation of PC at 1 and 3 layers are presented as circles in the centre with radius no more than 5 mm, while that at 12 layer is displayed as a cross with 25 mm range . In addition, they also elucidated the dependence on material coefficients, layer thickness and strike velocity of dynamic characteristics of composite plates.…”

Section: Introductionmentioning

confidence: 99%

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The dynamic response and failure of Polycarbonate plate by soft body impact

Yao

Han

2016

Polym Eng Sci

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This article is mainly to experimentally and numerically investigate the dynamic response and failure of Polycarbonate (PC) plate against strike by soft body. The experimental results show that high speed soft body impact leads to a large global displacement for PC sheet, though, the obtained strain data shows deformation of PC material are still small. This evidence allows us to employ a thermo-viscoelastic constitutive model we proposed in our previous work, where the model parameters are determined based on the uniaxial tension test data of PC materials, to describe the PC plate. Then, the simulation is made in finite element (FE) software LS-DYNA and computational results get a fair agreement with experiments including displacement, strain, and the crack propagations at high velocity impact. The temperature effect on mechanical behavior of PC sheet under impact is numerically studied as well. It is found that the effect gets more significant with the increase of impact velocity, and the higher temperature of

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Section: Numerical Simulationmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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The dynamic response and failure of Polycarbonate plate by soft body impact

Yao

Han

2016

Polym Eng Sci

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“…Visco-elastic models were proposed in [16] for a soft robotic mechanism horizontally actuated by two dielectric elastomer actuators. To maximize the energy dissipated in transparent laminates under low velocity impact, a genetic algorithm was employed in [17] to optimize a model considering thermo-elasto-visco-plastic materials.…”

Section: Introductionmentioning

confidence: 99%

A self-propelled robotic system with a visco-elastic joint: dynamics and motion analysis

Liu

Huda

Tang

et al. 2019

Engineering with Computers

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This paper studies the dynamics and motion generation of a self-propelled robotic system with a visco-elastic joint. The system is underactuated, legless and wheelless, and has potential applications in environmental inspection and operation in restricted space which are inaccessible to human beings, such as pipeline inspection, medical assistance and disaster rescues. Locomotion of the system relies on the stick-slip effects, which interacts with the frictional force at the surface in contact. The nonlinear robotic model utilizes combined tangential-wise and normal-wise vibrations for underactuated locomotion, which features a generic significance for the studies on self-propelled systems. To identify the characteristics of the visco-elastic joint and shed light on the energy efficacy, parameter dependences on stiffness and damping coefficients are thoroughly analysed. Our studies demonstrate that dynamic behaviour of the self-propelled system is mainly periodic and desirable forward motion is achieved via identification of the variation laws of the control parameters and elaborate selection of the stiffness and damping coefficients. A motion generation strategy is developed, and an analytical two-stage motion profile is proposed based on the system response and dynamic constraint analysis, followed by a parameterization procedure to optimally generate the trajectory. The proposed method provides a novel approach in generating self-propelled locomotion, and designing and computing the visco-elastic parameters for energy efficacy. Simulation results are presented to demonstrate the effectiveness and feasibility of the proposed model and motion generation approach.

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“…Antoine and Batra [14], employed a genetic algorithm to maximize the energy dissipated per unit area in laminates composed of layers of poly-methyl-metha-acrylate (PMMA), adhesive and polycarbonate (PC) targeted at low velocity by a rigid hemi-spherical nosed cylinder. The results shown that the sources of energy dissipation considered are plastic deformations of the PC and the PMMA, cracking of the PMMA, viscous deformations of the adhesive, and the energy used to deform failed elements that are deleted from the analysis domain.…”

Section: Introductionmentioning

confidence: 99%

Optimization of Safety Factor by Genetic Algorithm of Circular Notched Carbon / Epoxy Laminate at Low Velocity Impact

Maamar

Zenasni

2018

Period. Polytech. Mech. Eng.

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This work deals with the application of the genetic algorithm to the determination of optimal safety factor of layered structure subjected to low velocity impact damage. These genetic algorithms are optimization algorithms based on the techniques derived from genetics and the natural evolution; crossovers, mutations, selection. The numerical modeling was carried out by the finite element software LS dyna which is coupled to the optimization program Ls-optui. The aim of this work is to minimize the safety factor based on the Tsai-Wu criterion for laminate.The optimization is held by evaluating the maximal energy that can undergo the material for a minimum safety factor. In this case a composite laminate of stacking [0/30/45/60/90/45]s with a circular notch drilled at defined location, then a laminate was targeted at the center by four impactors (cylinder, hemispherical, ball and truncated cone). The optimization was held in two phases; first without taking account the function of delamination and in the second phase with the function of delamination.

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Optimization of transparent laminates for specific energy dissipation under low velocity impact using genetic algorithm

Cited by 9 publications

References 30 publications

The dynamic response and failure of Polycarbonate plate by soft body impact

The dynamic response and failure of Polycarbonate plate by soft body impact

A self-propelled robotic system with a visco-elastic joint: dynamics and motion analysis

Optimization of Safety Factor by Genetic Algorithm of Circular Notched Carbon / Epoxy Laminate at Low Velocity Impact

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