Journal ArticleDOI
Low velocity impact behavior of composite sandwich panels
TLDR
In this article, the low velocity impact behavior of composite sandwich panels consisting of woven carbon/epoxy facesheets and a PVC foam core was studied experimentally and a straightforward peak impact load estimation method gave good agreement with experimental results.Abstract:
Composite sandwich structures are susceptible to low velocity impact damage and thorough characterization of the loading and damage process during impact is important. The objective of this work is to study experimentally the low velocity impact behavior of sandwich panels consisting of woven carbon/epoxy facesheets and a PVC foam core. Instrumented panels were impacted with a drop mass setup and the load, strain, and deflection histories were recorded. Damage was characterized and quantified after the test. Results were compared with those of an equivalent static loading and showed that low velocity impact was generally quasi-static in nature except for localized damage. A straightforward peak impact load estimation method gave good agreement with experimental results. A contact force–indentation relationship was also investigated for the static loading case. Experimental results were compared with analytical and finite element model analysis to determine their effectiveness in predicting the indentation behavior of the sandwich panel.read more
Citations
More filters
Journal ArticleDOI
Experimental and numerical study on the low-velocity impact behavior of foam-core sandwich panels
TL;DR: In this article, the authors present the results of an experimental and numerical study on the low-velocity impact behavior of foam-core sandwich panels, and a progressive damage model is developed to describe the nonlinear behavior of plain weave carbon laminates during impact.
Journal ArticleDOI
Self-healing composite sandwich structures
TL;DR: In this article, a vascular sandwich structure that appears as a conventional sandwich composite has been developed and tested, where the vascular network is used to deliver a healing agent from a remote reservoir to a region of damage via a vascular network.
Journal ArticleDOI
A model to predict low-velocity impact response and damage in sandwich composites
TL;DR: In this paper, a modified energy-balance model coupled with the law of conservation of momentum is proposed to extend the validity of elastic impact models beyond the elastic regime, and three parameters were derived from the static load-deformation response: the elastic stiffness, the critical load at the onset of damage, and the damaged stiffness.
Journal ArticleDOI
On the impact response of sandwich composites with cores of balsa wood and PVC foam
Cesim Atas,Cenk Sevim +1 more
TL;DR: In this article, the impact response of composite panels with PVC foam core and balsa wood core was investigated under various impact energies and the primary damage modes observed are; fiber fractures at upper and lower skins, delaminations between adjacent glass-epoxy layers, core shear fractures, and face/core debonding.
Journal ArticleDOI
Impact and post impact behavior of composite sandwich panels
TL;DR: In this article, the authors investigated the damage tolerance of a composite sandwich structure composed of woven carbon/epoxy facesheets and a PVC foam core, and found that the facesheet delamination damage was quite detrimental to the load bearing capacity of the sandwich panel, highlighting the need for reliable damage detection techniques for composite sandwich structures.
References
More filters
Book
Impact on Composite Structures
TL;DR: In this article, the authors present contact laws, contact dynamics, low velocity impact damage, residual properties, and ballistic impact on sandwich structures, as well as the impact on the sandwich structure.
Journal ArticleDOI
The low velocity impact response of foam-based sandwich structures
TL;DR: In this paper, the authors investigated the low velocity impact response of a range of foam-based sandwich structures using an instrumented falling-weight impact tower and found that shear fracture was found in the PVC/PUR systems based on brittle core materials.
Journal ArticleDOI
Experimental investigation of low-velocity impact characteristics of sandwich composites
TL;DR: In this article, the authors present the results of an experimental investigation concerning the low-velocity impact response of sandwich composites with graphite/epoxy face sheets and foam or honeycomb cores.
Journal ArticleDOI
Fabrication, testing and analysis of composite sandwich beams
Isaac M. Daniel,Jandro L. Abot +1 more
TL;DR: In this paper, composite sandwich beams were fabricated by bonding unidirectional carbon/epoxy face sheets (laminates) to aluminum honeycomb cores with an adhesive film, and they were tested under four-point and three-point bending.