Contact force history analysis of composite sandwich plates subjected to low-velocity impact

Choi, Ik-Hyeon

doi:10.1016/j.compstruct.2006.04.017

Cited by 41 publications

(32 citation statements)

References 9 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…In the former applications [Icardi and Ferrero 2005;2006a;2006;2006b;2006c;2007a;2007b;Icardi 2007] this impact model always provided a contact force time history in good agreement with the experiments, and, where available, with the damage detected via ultrasonic inspection. As a further assessment, in this paper the impact problem on a sandwich plate is considered.…”

Section: 3mentioning

confidence: 56%

“…Although more sophisticated approaches could be used where the impactor and the structure are discretized by three-dimensional finite elements, the contact force can also be successfully simulated simply using modified versions of the Hertzian contact law, provided that the involved parameters are appropriately set either by numerical and analytical techniques, or by experiments. This is what appears in a large number of studies published in the literature [Tan and Sun 1985;Wu and Shyu 1993;Matemilola and Stronge 1995;Yigit and Christoforou 1995;Carvalho and Guedes Soares 1996;Lee et al 1997;Liou 1997;Choi 2006]. The Hertzian contact law correlates the contact force Ᏺ with the indentation depth α, by a parameter called the contact stiffness K c .…”

Section: 3mentioning

confidence: 97%

“…The contact force computed as outlined above is transformed into an equivalent force distributed at the nodes in the finite element discretization. This simplified approach for modeling the contact force was chosen because it provides results always in a good agreement with the experiments in the case of low velocity impacts, as shown by many researchers [Tan and Sun 1985;Wu and Shyu 1993;Matemilola and Stronge 1995;Yigit and Christoforou 1995;Carvalho and Guedes Soares 1996;Lee et al 1997;Liou 1997;Choi 2006;Icardi and Zardo 2005;Icardi and Ferrero 2005;2006a;2006b;2006c;2007a;2007b;2007;Icardi 2007], and is easy to implement.…”

Section: 3mentioning

confidence: 99%

See 2 more Smart Citations

A new tailoring optimization approach for improving structural response and energy absorption capability of laminated and sandwich composites

Icardi

Ferrero

2008

JOMMS

View full text Add to dashboard Cite

In this paper a technique for tuning the energy absorption properties of laminated and sandwich composites through a new tailoring concept is presented. The purpose is to minimize the energy absorbed through unwanted modes (ones involving interlaminar strengths) and maximize that absorbed through desired modes (ones involving membrane strengths) by finding a suited in-plane variable distribution of stiffness properties. Herein mode is intended as a strain energy contribution, such as bending energy, in-plane and out-of-plane shear energy, etc., and no vibration mode. This distribution is obtained making extremal certain strain energy contributions of interest (for example, membrane, bending, in-plane, and out-of-plane shear energies) under in-plane variation of the plate stiffness properties. The effect of this technique is to act as an energy absorption tuning, since it minimizes or maximizes the amount of energy absorbed by specific modes. Although the present technique could be applied to laminates or to the face sheets of sandwich composites, in this paper a preliminary application is presented to single plies with variable stiffness coefficients over their plane. Once incorporated into a laminate or a sandwich composite, these layers are shown to have beneficial effects on the strength at the onset of delamination in sample cases where laminated and sandwich composites are subjected to low velocity, low energy impacts.

show abstract

Section: 3mentioning

confidence: 56%

Section: 3mentioning

confidence: 97%

Section: 3mentioning

confidence: 99%

See 1 more Smart Citation

A new tailoring optimization approach for improving structural response and energy absorption capability of laminated and sandwich composites

Icardi

Ferrero

2008

JOMMS

View full text Add to dashboard Cite

show abstract

“…Such an analytical solution describes the history of the contact force, displacement of the impactor, and displacement of the panel in the transverse direction in terms of material properties, structural mass, impactor mass and velocity, and structural damping. Contact force history by impact on composite sandwich plates can be obtained using general-purpose commercial FEM software using the spring element by Choi (2006).The advantage of this method is that no coding process is necessary for the development of additional FEM program. Dynamic response of the composite cylindrical shells under initial stresses and impulse effects were studied by Khalili et al (2009).…”

Section: Symbols and Abbreviationsmentioning

confidence: 99%

High Order Impact Elastic Analysis of Circular Thick Cylindrical Sandwich Panels Subjected to Multi-mass Impacts

Fard

Ghorghabad

Azarnia

et al. 2015

Lat. Am. j. solids struct.

View full text Add to dashboard Cite

This study dealt with the dynamic model of composite cylindrical sandwich panels with flexible cores and simply supported boundary conditions under low velocity impacts of multiple large or small masses using a new improved higher order sandwich panel theory (IHSAPT). In-plane stresses were considered for the core and face sheets. Formulation was based on the first order shear deformation theory for the composite face sheets and polynomial description of the displacement fields in the core that was based on the second Frostig's model. Fully dynamic effects of the soft core and face-sheets were considered in this investigation. Impacts were assumed to occur simultaneously and normally over the top facesheet with arbitrarily different masses and initial velocities. The contact forces between the panel and impactors were treated as the internal forces of the system. In this paper, nonlinear contact stiffness was linearized with a newly presented improved analytical method. Numerical results of the mentioned structures were compared with finite element model using ABAQUS code.

show abstract

“…Yigit and Christoforou (1995) for laminates and Choi (2006) for sandwiches), nevertheless it was developed for isotropic media. A different alternative approach accounting for the heterogeneous nature of composites is that developed by Chao and Tu (1999).…”

Section: Introductionmentioning

confidence: 99%

Impact Damage Analysis with Stress Continuity Constraints Fulfilment at Damaged-Undamaged Regions and at Layer Interfaces

Icardi

Urraci

2017

Lat. Am. j. solids struct.

View full text Add to dashboard Cite

Low-velocity impacts have a relevant importance for safety of laminated and sandwich composite structures, because they are highly susceptible to damage. In this paper, a 3D cost effective zig-zag model is developed in order to efficiently simulate such impacts. It a priori fulfills the continuity of out-of-plane stresses at layer interfaces, the continuity of stresses under in-plane variation of properties across undamaged and damaged regions and it is suitable for general boundary conditions. Its main advantage is its capability to accurately predict stresses from constitutive equations at a low cost, along with being refined across the thickness keeping fixed the number of unknowns. A modified Hertzian contact law that forces the target to conform to the shape of the impactor and the Newmark's implicit time integration scheme are used for computing the contact force time history. The progressive damage analysis is carried out using stress-based criteria. Non-classical feature, a continuum damage mesomechanic model is employed that accounts for the effects of local failures in homogenized form by modifying the strain energy expression. Fiber, matrix and delamination failures are predicted using stress-based criteria, and then the modified strain energy expression is employed for computing stresses. Such modeling options enable to account for the residual properties as they are in the reality, as shown by the comparison with the damage experimentally detected. As shown by the comparison with experiments, a closed-form solution by the Galerkin's method, obtained as a series expansion of trial displacement functions, accurately simulates the contact force and the damage progressively accumulated. The results show the importance of in-plane stress continuity for obtaining accurate predictions.Keywords Impact-induced damage; 3D variable-kinematics zig-zag model; undamaged/damaged stress continuity; interlayer stress continuity; fixed d.o.f; mesomechanic damage model.

show abstract

Contact force history analysis of composite sandwich plates subjected to low-velocity impact

Cited by 41 publications

References 9 publications

A new tailoring optimization approach for improving structural response and energy absorption capability of laminated and sandwich composites

A new tailoring optimization approach for improving structural response and energy absorption capability of laminated and sandwich composites

High Order Impact Elastic Analysis of Circular Thick Cylindrical Sandwich Panels Subjected to Multi-mass Impacts

Impact Damage Analysis with Stress Continuity Constraints Fulfilment at Damaged-Undamaged Regions and at Layer Interfaces

Contact Info

Product

Resources

About