Carbon Foam Core Composite Sandwich Beams: Flexure Response

2005 ◽  
Vol 39 (12) ◽  
pp. 1067-1080 ◽  
Author(s):  
M. D. Sarzynski ◽  
O. O. Ochoa
Keyword(s):  
Carbon Foam ◽  
Foam Core ◽  
Sandwich Beams ◽  
Composite Sandwich

scholarly journals FEM analysis of dynamic flexural behaviour of composite sandwich beams with foam core

2010 ◽  
Vol 92 (9) ◽  
pp. 2285-2291 ◽  
Author(s):  
Inés Ivañez ◽  
Carlos Santiuste ◽  
Sonia Sanchez-Saez
Keyword(s):  
Fem Analysis ◽  
Foam Core ◽  
Sandwich Beams ◽  
Flexural Behaviour ◽  
Composite Sandwich

The response of pin-clamped carbon fibre-reinforced plastics composite sandwich beams with polyvinylchloride foam core under bending impact

2020 ◽  
Vol 39 (9-10) ◽  
pp. 384-405
Author(s):  
Umut Caliskan ◽  
M Kemal Apalak
Keyword(s):  
Failure Mechanism ◽  
Sandwich Beam ◽  
Sheet Thickness ◽  
Adhesive Layer ◽  
Failure Criteria ◽  
Face Sheet ◽  
Foam Core ◽  
Sandwich Beams ◽  
Composite Sandwich ◽  
Fibre Angle

The dynamic response of pin-clamped composite sandwich beam in terms of face-sheet effect with polyvinylchloride foam core subjected to bending impact loading was investigated in this paper. Composite sandwich beams with three different unidirectional skin layups of [0]4, [45]4 and [90]4 and two types of face-sheet thickness of 1 ([0]4) and 2 ([0]8) mm were fabricated. An explicit code, VUMAT, is written and implemented in ABAQUS/Explicit. The micro-computerised tomography scanning was used to detect adhesive layer failure. The ply angle orientation of face sheets plays an important role in the failure mechanism of the sandwich beam under bending loads. Although it is known that the fibre angle in the direction perpendicular to the bending direction is more stiff and strength, damage tolerances under bending impact loads of beams with other fibre angles were determined. In addition, as the number of layers increased, failure mechanism and load-carrying capacity of composite face sheets changed completely for increasing bending stiffness. This research provides fundamental information about the change of the failure mechanisms as the fibre angle and thickness of the face sheet were changed and in terms of interpretation with the help of finite elements using different failure criteria.

scholarly journals Failure of Composite Sandwich Beams

2002 ◽  
Vol 11 (3) ◽  
pp. 096369350201100 ◽  
Author(s):  
I. M. Daniel ◽  
E. E. Gdoutos ◽  
K.-A. Wang
Keyword(s):  
Failure Modes ◽  
Foam Core ◽  
Sandwich Beams ◽  
Composite Sandwich ◽  
Four Point Bending ◽  
Constituent Material ◽  
Closed Cell ◽  
Failure Envelopes ◽  
Geometrical Dimensions ◽  
Cell Foam

A thorough investigation of failure behaviour of composite sandwich beams under three- and four-point bending was undertaken. The beams were made of unidirectional carbon/epoxy facings and a PVC closed-cell foam core. The constituent materials were fully characterised and in the case of the foam core, failure envelopes were developed for general two-dimensional states of stress. Various failure modes including facing wrinkling, indentation failure and core failure were observed and compared with analytical predictions. The initiation, propagation and interaction of failure modes depend on the type of loading, constituent material properties and geometrical dimensions.

Investigation of elastomeric foam response applied as core for composite sandwich beams through progressive failure of the beams

2017 ◽  
Vol 21 (2) ◽  
pp. 604-638
Author(s):  
AR Nazari ◽  
MZ Kabir ◽  
H Hosseini Toudeshky
Keyword(s):  
Finite Element ◽  
Carrying Capacity ◽  
Progressive Failure ◽  
Core Material ◽  
Foam Core ◽  
Sandwich Beams ◽  
Load Carrying Capacity ◽  
Composite Sandwich ◽  
The Core ◽  
Load Carrying

In this paper an elastomeric foam is applied as core for the composite sandwich beams and load carrying capacity, load–deflection response, and progressive failure are examined through experimental and finite element studies. The objective of this study is to assess the efficiency of elastomeric foam-cored sandwich (EFCS) beams relative to crushable foam-cored sandwich (CFCS) beams. The experimental program consists of two phases. In the first phase, some characterization tests are conducted on the constituent materials of the sandwich beams such as tension, compression, and shear tests on the foam and bending test on the composite beams utilized as skins. Then in the second phase, the performance of the sandwich beams is examined under bending conditions. The load carrying behavior of the sandwich beams is considered dependent on two main features of the constituent materials: (1) the hyperelastic behavior of the foam core and (2) the progressive damage of the composite skins. These characteristics are simulated by the finite element models. Due to elastomeric rather than crushable deformation of the applied foam as the core, the conventional damage modes of the CFCS beams associated to the brittleness of the core material are omitted through load carrying capacity of the EFCS beams. So in the recent sandwich beams by omission of the core failure modes and utilization of compressive residual strength of the top composite skin, considerable energy is absorbed prior to failure of the bottom composite skin. By simulation of the test specimens using FE models, the response of the foam applied as core for the sandwich beams through progressive failure of the beams is investigated. The results show that the elastomeric foam core can provide superior features for the sandwich components especially for the cases in which high energy absorption capacity is required.

scholarly journals Failure modes of composite sandwich beams

2008 ◽  
Vol 35 (1-3) ◽  
pp. 105-118 ◽  
Author(s):  
E. Gdoutos ◽  
I.M. Daniel
Keyword(s):  
Failure Modes ◽  
Failure Behavior ◽  
Foam Core ◽  
Sandwich Beams ◽  
Composite Sandwich ◽  
Four Point Bending ◽  
Constituent Material ◽  
Closed Cell ◽  
Failure Envelopes ◽  
Geometrical Dimensions

A thorough investigation of failure behavior of composite sandwich beams under three-and four-point bending was undertaken. The beams were made of unidirectional carbon/epoxy facings and a PVC closed-cell foam core. The constituent materials were fully characterized and in the case of the foam core, failure envelopes were developed for general two-dimensional states of stress. Various failure modes including facing wrinkling, indentation failure and core failure were observed and compared with analytical predictions. The initiation, propagation and interaction of failure modes depend on the type of loading, constituent material properties and geometrical dimensions.

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