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2 edition of Interlaminar mode-II fracture toughness of a glass-fiber epoxy laminate found in the catalog.

Interlaminar mode-II fracture toughness of a glass-fiber epoxy laminate

Heikki Keinanen

Interlaminar mode-II fracture toughness of a glass-fiber epoxy laminate

by Heikki Keinanen

  • 259 Want to read
  • 3 Currently reading

Published by Technical Research Centre of Finland in Espoo, Finland .
Written in English

    Subjects:
  • Epoxy resins.,
  • Fracture mechanics.,
  • Glass reinforced plastics.,
  • Laminated materials.

  • Edition Notes

    Bibliography: p. 29-30.

    StatementHeikki Keinanen, Tero Uuttu & Mikko Lehtonen.
    SeriesVTT publications -- 105., VTT julkaisuja -- 105.
    ContributionsUuttu, Tero., Lehtonen, Mikko., Valtion teknillinen tutkimuskeskus.
    The Physical Object
    Pagination30 p. ;
    Number of Pages30
    ID Numbers
    Open LibraryOL15500899M
    ISBN 109513842231

    The research aims to investigate the interlaminar fracture toughness of glass fiber/epoxy composites, which consist of the silica nanoparticles and the rubber particles. Two kinds of rubber particles, one is the reactive liquid rubber (CTBN) and the other is the core-shell rubber (CSR), were employed to modify the fracture toughness of epoxy resin. B. Hulugappa et al. 3 fected. Naveed et al. [33] studied the mode-I interlaminar fracture behavior and mechanical properties of carbon fiber reinforced and nanoclay filled epoxy matrix composites. They found that organoclay brought about a si- g-nificant improvement in flexural modulus especially in the first few wt% of loading also fracture toughness in-.

    Significant increases in toughness were observed (up to about 50 with 30% volume fraction of bead). In the phenolic bead-filled epoxy, the major toughening mechanism is crack pinning, while in the carbon bead-filled epoxy, localized plastic deformation associated with particle-matrix debonding and transparticle fracture lead to the toughening. This work reports the effect of multiwalled carbon nanotubes on mixed-mode I/II interlaminar fracture toughness (G I / IIC) of unidirectional carbon fiber/epoxy composite laminates made by carbon fiber/epoxy laminates were fabricated in an autoclave with a previous deposition of different multiwalled carbon nanotube contents at their middle plane interface by spraying technique.

    The effects of the content and position of shape memory alloy (SMA) wires on the mechanical properties and interlaminar fracture toughness of glass‐fiber‐reinforced epoxy (GF/epoxy) composite laminates are investigated. For this purpose, varying numbers of SMA wires are embedded in GF/epoxy composite laminates in different stacking sequences.   In this paper, an experimental investigation on interlaminar fracture behavior and fracture toughness of a graphite/epoxy multidirectional composite laminate is presented using end-notched flexure specimens. The 0/θ interfaces are considered.


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Interlaminar mode-II fracture toughness of a glass-fiber epoxy laminate by Heikki Keinanen Download PDF EPUB FB2

In this work, the effect of seawater ageing on mode I and mode II interlaminar fracture toughness (GIC and GIIC) of prepreg-based woven glass fiber/epoxy laminates with and without multiwall carbon.

In this article, Mode I and Mode II interlaminar fracture toughness, interlaminar shear strength, flexural strength and the flexural modulus of continuous unidirectional E‐glass fiber reinforced epoxy composites modified with three different graphite oxide (GO) fillers were by: The mode-II interlaminar fracture toughness properties following the end notched flexure method of nanostitched carbon/epoxy nanoprepreg composites were studied.

Toughness of Epoxy-Glass Fiber. Epoxy glass fiber laminate composite (PMCs) are finding ever increasing applications in aerospace and automobile industries due to its high strength to weight ratio and resistance to aqueous environment. Additions of particulate reinforcements in the polymer matrix are reported to improve the Interlaminar Shear Strength and Interlaminar Fracture Toughness of the by: 7.

Interlaminar fracture toughness is an important parameter to characterize the delamination performance of carbon fiber-reinforced epoxy laminates. In this study, the mode-I fracture toughness of interlaminar interfaces with different local ply angles were studied by Author: Chen Liu, Ruixiang Bai, Zhenkun Lei, Jianyu Di, Dili Dong, Tiancheng Gao, Hao Jiang, Cheng Yan.

It was shown that the nanofibrilmat is responsible for a major interlaminar fracture toughness improvement, as high as %, compared to a noninterleaved carbon/epoxy reference laminate.

The highest improvement in tensile and flexural strength was obtained with 10 wt% content of SSA. The highest mode II interlaminar fracture toughness’s was obtained with 15 wt% content of SSA.

The mode II interlaminar fracture toughness’s improved by %, respectively, compared to the composite without SSA. The main parameters in this model are initial stiffness of the elastic region k 1, the maximum cohesive stress σ m a x c and the area under the traction-separation law that indicates the interlaminar fracture toughness of the laminated composites.

Download: Download high-res image (90KB) Download: Download full-size image; Fig. Bilinear. In unexposed condition Mode I interlaminar fracture toughness of epoxy glass fiber laminate composite improved by the addition offly ash reinforcement 10% (By weight) by % and when it was subjected to aqueous fog for 10 days the interlaminar fracture toughness improved %.

Exposure to aqueous fog for 10 days causes. Interlaminar fracture toughness of unidirectional unsized and CNT grafted composites is investigated by performing mode-II fracture testing on 16 ply laminated composites prepared according to ASTM D A 15 µm thick plastic sheet inserted at the mid-plane of the laminate.

The paper presents experimental tests of unidirectional double cantilever beams made of a glass fiber reinforced (GFRP) laminate. The critical value of the strain energy release rate (c-SERR or G IC), i.e., the mode I fracture toughness of the considered material was determined with three different methods: the compliance calibration method (CC), the modified compliance calibration method (MCC.

In this work, the rate dependence of mode I interlaminar fracture toughness for two different materials systems, IM7/ and IM7/M91, both unidirectional UD carbon-fibre epoxy composite laminates have been examined over a wide range of loading rates from mm/min up to mm/s at room temperature.

bridging zone could also explain why the interlaminar fracture toughness of the flax composite is significantly higher than those measured for glass fiber composites ( J/m2) [26].

It is therefore essential to consider the effect of fiber bridging in the FE delamination model for natural fiber composites, in order to achieve a more accurate. The incorporation of MWCNTs to bulk epoxy and CFRPs moderately increased the mode-I fracture energy, and significantly increased the mode-II fracture energy, i.e.

the average mode-II fracture energy of CFRPs increased from J/m 2 to J/m 2 due to the addition of wt% MWCNTs, and further to J/m 2 due to the addition of 1 wt.

Mode I and mode II interlaminar fracture toughness were optimum at borax content of 15 and 10 wt%, with increment of and %, respectively, compared to and % at SiC particles of   The fracture surfaces are examined by scanning electron microscopy to identify the fracture mechanisms.

The most important conclusion from the present study is that at temperature lowering from to 20 K the mode III fracture toughness increases, further cooling to 4 K produces a toughness decrease. The present work is focused on improving mode I and mode II delamination resistance of glass/epoxy composite laminates (50 wt.% of glass fibers) with milled glass fibers, added in various amounts (, 5, and 10% of the epoxy weight).

Including fillers in the interlayer enhances the delamination resistance by providing a bridging effect, therefore demanding additional energy to initiate. Li‐Dan Xu, Ming‐Fang Shi, Xiao‐Yu Sun, Zhen‐Qing Wang, Bin Yang, Mechanical Properties and Interlaminar Fracture Toughness of Glass‐Fiber‐Reinforced Epoxy Composites Embedded with Shape Memory Alloy Wires, Advanced Engineering Materials, /adem, 20.

Mode II Interlaminar Fracture Toughness and Fatigue Characterization of a Graphite Epoxy Composite Material Mode II interlaminar fracture toughness and delamination onset and growth characterization data were generated for IM7/ graphite epoxy composite materials from two suppliers for use in fracture mechanics analyses.

Both the fracture toughness testing and the. This work studies and evaluates the interlaminar fracture toughness and delamination behavior of UD flax/epoxy composite under Mode I, Mode II, and Mixed-mode I/II loading.

The composites were tested following corresponding ASTM standards and fulfilled all the requirements. The mode-I and mode-II interlaminar fracture toughness values, G IC and G IIC, for the hybrid composite were about three and two times higher than that for the uniweave composite, respectively.Carbon fiber reinforced polymer (CFRP) laminates exhibit limited fracture toughness due to characteristic interlaminar fiber-matrix cracking and delamination.

In this article, we demonstrate that the fracture toughness of CFRP laminates can be improved by the addition of multi-walled carbon nanotubes (MWCNTs).

Experimental investigations and numerical modeling were performed to .The paper presents experimental tests of unidirectional double cantilever beams made of a glass fiber reinforced (GFRP) laminate.

The critical value of the strain energy release rate (c-SERR or GIC), i.e., the mode I fracture toughness of the considered material was determined with three different methods: the compliance calibration method (CC), the modified compliance calibration method (MCC.