NDLI: Simulation of delamination-migration and core crushing in a cfrp sandwich structure

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Simulation of delamination-migration and core crushing in a cfrp sandwich structure

Content Provider	NASA Technical Reports Server (NTRS)
Author	Ratcliffe, J. McElroy, M. Czabaj, M. Leone, F. Yuan, F. G.
Copyright Year	2015
Description	Following the onset of damage caused by an impact load on a composite laminate structure, delaminations often form propagating outwards from the point of impact and in some cases can migrate via matrix cracks between plies as they grow. The goal of the present study is to develop an accurate finite element modeling technique for simulation of the delamination-migration phenomena in laminate impact damage processes. An experiment was devised where, under a quasi-static indentation load, an embedded delamination in the facesheet of a laminate sandwich specimen migrates via a transverse matrix crack and then continues to grow on a new ply interface. The quasistatic nature of the indentation results in structural behavior equivalent to that seen in low-velocity impact and also allows for highly detailed real time damage characterization. Several finite element damage simulation methods were investigated. Comparing the experimental results with those of the different models reveals certain modeling features that are important to include in a numerical simulation of delamination-migration and some that may be neglected.
File Size	1770964
Page Count	27
File Format	PDF
Alternate Webpage(s)	http://archive.org/details/NASA_NTRS_Archive_20160010665
Archival Resource Key	ark:/13960/t2v45qw6m
Language	English
Publisher Date	2015-03-10
Access Restriction	Open
Subject Keyword	Structural Mechanics Composite Materials Finite Element Method Simulation Delaminating Mathematical Models Carbon Fiber Reinforced Plastics Honeycomb Structures Laminates Composite Structures Impact Loads Sandwich Structures Impact Damage Real Time Operation Ntrs Nasa Technical Reports Server (ntrs) Nasa Technical Reports Server Aerodynamics Aircraft Aerospace Engineering Aerospace Aeronautic Space Science
Content Type	Text
Resource Type	Article

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