Modeling and simulation of laser shock waves in elasto-plastic 1D layered specimens

Lapostolle, L.; Derrien, Katell; Morin, Léo; Berthe, Laurent; Castelnau, Olivier

doi:10.1016/j.ijsolstr.2022.111422

Cited by 2 publications

(5 citation statements)

References 47 publications

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“…The stress of the elastic-plastic decompression shock that takes the material from state 3′ to state 4′ and from state 5′ to state 6′ is

and it is of great importance because it can be compared with the interface’s tensile strength or the spall fracture strength. It is noteworthy that the above applies only when the stresses are located in the high-stress amplitude range [ 18 ] and depends only on the mechanical properties of the material at the back free surface [ 22 ].…”

Section: Computational Tools and Resultsmentioning

confidence: 99%

“…To optimize the LSPS method, a good understanding of the physical phenomena that take place is needed. Aside from the numerous experimental works, several analytical [ 15 , 16 , 17 , 18 , 19 , 20 , 21 , 22 ] and numerical [ 1 , 2 , 5 , 6 , 10 , 23 ] models have been developed to describe the shock wave propagation and its interaction inside a solid material. This is not an easy task due to the nature of the shock wave, which acts as a discontinuity inside the material.…”

Section: Introductionmentioning

confidence: 99%

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Analytical and Numerical Modeling of Stress Field and Fracture in Aluminum/Epoxy Interface Subjected to Laser Shock Wave: Application to Paint Stripping

Papadopoulos

Τσερπές

2022

Materials

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In this paper, analytical and numerical models have been developed to compute the stress field and predict fracture of the aluminum/epoxy interface subjected to laser shock loading, in the frame of the investigation of the paint stripping process. An explicit finite element (FE) model combined with the cohesive zone modeling (CZM) method, an analytical stress analysis model, and a spall fracture model have been developed. The numerical model has been calibrated and validated against tests in terms of the stripping pattern, while the analytical models have been compared with the numerical model. The models were combined to generate computational tools for decreasing computational effort. The FE model with the CZM is the most accurate tool although it is the most computationally expensive. The spall fracture model gives trusted estimations of the spall strength of the interface which are very sensitive to the interface thickness and when incorporated into a continuum FE-based damage model can predict the stripping initiation faster than the FE model with the CZM. The analytical stress analysis model can be used to efficiently describe the shock wave propagation into the material system, but it can give only a rough estimation of the tensile stress at the epoxy, which when combined with the spall strength does not give reliable predictions of the stripping initiation. The three models require as input different material properties, some of which are very difficult to determine. Nevertheless, the availability of accurate material parameters and properties of the aluminum, the epoxy, and, especially, their interface can significantly improve the efficiency of the developed models.

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“…The stress of the elastic-plastic decompression shock that takes the material from state 3′ to state 4′ and from state 5′ to state 6′ is

Section: Computational Tools and Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analytical and Numerical Modeling of Stress Field and Fracture in Aluminum/Epoxy Interface Subjected to Laser Shock Wave: Application to Paint Stripping

Papadopoulos

Τσερπές

2022

Materials

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“…Thereafter, we consider the following hypotheses. Following several works [3,11,13,14] and with in mind the derivation of an exact solution, we assume a uniaxial total strain field, such that…”

Section: Boundary and Initial Conditions (1)mentioning

confidence: 99%

“…We derive here the stress wave propagation equation, which we put in the form of a hyperbolic system, following the same developments as in previous works [11,13,14]. Equation (1) 1 combined with Equation (1) 2 derived with respect to time yields the following system:…”

Section: Stress Wave Equationmentioning

confidence: 99%

“…[6][7][8][9][10] using finite elements modeling. The effect of the sample microstructure on the wave propagation and the residual stress field has been investigated for 1D laminate specimens [11] and 2D polycrystalline aggregates [12], and a numerical method for fast residual stress estimation has been proposed recently using an elasto-viscoplastic relation [13].…”

Section: Introductionmentioning

confidence: 99%

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Exact expressions of the uniaxial perfectly elasto-plastic stress wave and induced mechanical fields in the case of a finite impact: application to laser shock peening

Lapostolle,

Morin,

Derrien

et al. 2023

Comptes Rendus. Mécanique

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Modeling and simulation of laser shock waves in elasto-plastic 1D layered specimens

Cited by 2 publications

References 47 publications

Analytical and Numerical Modeling of Stress Field and Fracture in Aluminum/Epoxy Interface Subjected to Laser Shock Wave: Application to Paint Stripping

Analytical and Numerical Modeling of Stress Field and Fracture in Aluminum/Epoxy Interface Subjected to Laser Shock Wave: Application to Paint Stripping

Exact expressions of the uniaxial perfectly elasto-plastic stress wave and induced mechanical fields in the case of a finite impact: application to laser shock peening

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