79 lines
3 KiB
Markdown
79 lines
3 KiB
Markdown
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# optimization method of composite laminates with a viscoelastic layer
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[ref](https://d1wqtxts1xzle7.cloudfront.net/33874260/2011-2-libre.pdf?1401929433=&response-content-disposition=inline%3B+filename%3DMulti_objective_Optimization_of_Co_cured.pdf&Expires=1726671246&Signature=X30Tmzd9RIn7nsIGU2Q4ZgeCchtgP~md5owXYAwnVnZj9pZCx1Ck~6owvGcTyWQwCJcm~i3zbXCXioNqPemkodqkkJ3m3mQZJ5yY7FYpc2i86ZUsACau8A-Gr3YNQ0XNFIGO4drqLGq21zz67T-CnsYfUV3LRpvY4wiZ2TWs4Q~ImvfTtlxcDTCCr4JW5abxR75Fi0yiSe6og7qjwdLh8E50qFdcXTvijO6qm9dnpW854ozStXkGkhsq16PzBfIbFLE7yrXc6zzAtUUHF5YpUfZRYl7V2xfu8s51Cvp9-YIJ8gt2v-qm2uQM92DPbZ9J62unLsIog2pr-HUWUxjqDw__&Key-Pair-Id=APKAJLOHF5GGSLRBV4ZA)
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This paper develops a method to transform a multi objective (damping and stiffness)
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into a single one, to facilitate optimization.
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# experimental investigation of the dissipation of a viscoelastic inserted layer
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[ref](https://sci-hub.se/https://journals.sagepub.com/doi/abs/10.1177/1077546319844545)
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This paper try to assess the damping qualities of a visco elastic insert. It found that it is very efficient in medium and high frequency ranges.
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---
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---
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# model for impact on fiber metal laminate with a viscoelastic layer
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[ref](https://doi.org/10.1016/j.ijmecsci.2021.106298)
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_can teach about impact on viscoelastic sandwich impact_
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Use a specific criterion to quantitatively estimate whether the composite
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structure is damaged subjected to impact excitation.
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Reddy’s high-order shear deformation theory for the viscoelastic layer
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---
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# Hard and Soft Collisions
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[ref](https://www.compadre.org/Physlets/mechanics/illustration8_3.cfm)
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A soft collision is an inelastic collision, which means that kinetic energy
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is not conserved (because internal friction). However, the momentum is still
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conserved.
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A perfectly inelastic collision occurs when the two bodies stays together,
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and the energy is lost by bonding the two bodies.
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# inelastic collison for composite materials
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[ref](https://doi.org/10.1016/0263-8223(90)90025-A)
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Use the finite element model to get the dynamic response.
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The structure is considered elastic but the loading is considered
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inelastic.
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The isoparametric linear shell element is modified
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to take into account the shear deformation and rotatory inertia.
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inelastic collision : masses added together and
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momentum conserved, used for slamming or other wave-like loading
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This model is reasonable when the impactor is relatively soft and the mass
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of impactor is larger than the mass of the node being impacted.
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# finite element modeling of low-velocity impact on laminated composite plates and cylindrical shells
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[ref](https://doi.org/10.1016/j.compstruct.2010.10.003)
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use of abaqus
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examination of the validity of different models
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propose a benchmark method in low-velocity impact modeling of composite structures
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# Analysis of Laminated Composites Subjected to Impact (p 243)
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[ref](https://link.springer.com/chapter/10.1007/978-3-030-66717-7_19)
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very recent paper, propose both theoretical and experimental approaches to
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the analysis of laminated composite response to impact loading
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