The Experts below are selected from a list of 198 Experts worldwide ranked by ideXlab platform

Michael Richard Bambach - One of the best experts on this subject based on the ideXlab platform.

  • experimental and numerical study of the bending strength of Natural Fibre Composite structural channel sections
    Composite Structures, 2019
    Co-Authors: Michael Richard Bambach
    Abstract:

    Abstract Increasing awareness of environmental concerns is leading a drive towards more sustainable structural materials for the built environment. Natural Fibres such as flax and jute have increasingly been considered for Fibre-resin Composites, with a major motivation for their implementation being their notable sustainability attributes. This paper is part of an ongoing effort by the author to demonstrate the structural properties of primary structural elements and members fabricated from Natural Fibre Composites of flax and jute. Previously the structural properties of flat plates, plain channel sections and channel sections with complex stiffeners were investigated under pure compression. This paper presents investigations of channel sections with complex stiffeners under pure bending. A series of sixteen channels with varying geometries, complex stiffener arrangements and Composite thicknesses were tested in pure flexure. Material tests indicated that the mean tensile elastic stiffness and strength values were 6386 MPa and 55.1 MPa for flax, and 6941 MPa and 62.1 MPa for jute. The experimental results indicated that flexural failure of the channel sections was governed by tensile fracturing. The ultimate moment capacities varied from 1.043 to 1.501 kNm for four-layered Composites, and 2.184 to 2.511 kNm for six-layered Composites. The analytical models predicted the experimental ultimate moment capacities well, with a mean and coefficient of variation of the test to predicted ratio of 0.97 and 0.06, respectively. Finite element models used progressive damage analysis via stress-based damage initiation models and damage evolution laws, to replicate the tension fracture failure mode of the channels. The numerical models predicted the experimental ultimate moment capacities well, with a mean and coefficient of variation of the test to predicted ratio of 0.99 and 0.06, respectively.

  • geometric optimisation and compression design of Natural Fibre Composite structural channel sections
    Composite Structures, 2018
    Co-Authors: Michael Richard Bambach
    Abstract:

    Abstract Public concerns about the environment, climate change, energy consumption and greenhouse gas emissions have placed increasing demands for the use of sustainable materials in the built environment. Natural Fibres such as flax, jute and hemp have recently been considered for Fibre-resin Composites, with a major motivation for their implementation being their notable sustainability attributes. However, many studies have noted the relatively modest mechanical properties of Natural Fibre Composites. Despite this, a recent paper by the author demonstrated that the compression strength of flat plates and plain channel sections may be suitable for light structural applications. This paper presents the geometric optimisation of channel sections via the inclusion of complex web, flange-edge and flange-interior stiffeners. It is demonstrated that the inclusion of geometric stiffeners restricts the development of local buckling, creating less slender channel sections with greater compression strength. Compression strengths are compared with steel and timber wall stud strengths and shown to be suitable for residential building applications. The combined plain channel and stiffened channel experimental data covers a broad range of section slenderness values, and design models are developed to predict their compression strength.

  • compression strength of Natural Fibre Composite plates and sections of flax jute and hemp
    Thin-walled Structures, 2017
    Co-Authors: Michael Richard Bambach
    Abstract:

    Abstract Natural Fibres such as flax, jute and hemp have been utilised for thousands of years, however have only recently been considered for Fibre-resin Composites. A major motivation for such an application is their superior sustainability attributes compared with traditional building materials. Population rise continues to place increasing demands for new infrastructure. Meanwhile, public concerns about the environment, climate change, energy consumption and greenhouse gas emissions, place increasing demands for the use of sustainable materials in infrastructure. While there is a wealth of knowledge in the materials aspects of Natural Fibre Composites, relatively few studies have investigated their potential for structural applications. This paper presents an experimental and analytical study of Natural Fibre Composite plates and channel sections consisting of flax, jute and hemp Fibres and subjected to pure compression. The intrinsic mechanical properties are shown to be relatively modest. However, the buckling and post-buckling responses are shown to be stable, the ultimate condition is reached in a stable and predictable manner, and failure ensues in a gradual and ductile process. These characteristics show promise for the use of Natural Fibre Composite sections in light structural applications such as in the residential and light commercial markets. Additionally, the analytical effective width mechanics model shows promise for use as a design technique for estimating their compression strength.

Asmaa S. Hamouda - One of the best experts on this subject based on the ideXlab platform.

  • quasi static crushing behaviour of hybrid and non hybrid Natural Fibre Composite solid cones
    Composite Structures, 2004
    Co-Authors: E Mahdi, Asmaa S. Hamouda
    Abstract:

    A comprehensive experimental investigation of the quasi-static axial crushing of hybrid and non-hybrid Natural Fibre/polyester Composite solid cones between flat platens has been carried out. The Composite solid cones were fabricated from two types of Natural Fibres namely oil palm Fibre and coir Fibre and different vertex angles varied from 0° to 60°. Typical load-deformation histories are presented and discussed. Crashworthiness parameters such as load carrying capacity; energy absorption capability and failure mechanism have been discussed. The results presented in this study will help us to understand the behaviour and characteristics of Natural Fibre Composite as a filler material.

  • Quasi-static crushing behaviour of hybrid and non-hybrid Natural Fibre Composite solid cones
    Composite Structures, 2004
    Co-Authors: E Mahdi, Asmaa S. Hamouda, A. C. Sen
    Abstract:

    A comprehensive experimental investigation of the quasi-static axial crushing of hybrid and non-hybrid Natural Fibre/polyester Composite solid cones between flat platens has been carried out. The Composite solid cones were fabricated from two types of Natural Fibres namely oil palm Fibre and coir Fibre and different vertex angles varied from 0° to 60°. Typical load-deformation histories are presented and discussed. Crashworthiness parameters such as load carrying capacity; energy absorption capability and failure mechanism have been discussed. The results presented in this study will help us to understand the behaviour and characteristics of Natural Fibre Composite as a filler material. © 2004 Elsevier Ltd. All rights reserved.

E Mahdi - One of the best experts on this subject based on the ideXlab platform.

  • quasi static crushing behaviour of hybrid and non hybrid Natural Fibre Composite solid cones
    Composite Structures, 2004
    Co-Authors: E Mahdi, Asmaa S. Hamouda
    Abstract:

    A comprehensive experimental investigation of the quasi-static axial crushing of hybrid and non-hybrid Natural Fibre/polyester Composite solid cones between flat platens has been carried out. The Composite solid cones were fabricated from two types of Natural Fibres namely oil palm Fibre and coir Fibre and different vertex angles varied from 0° to 60°. Typical load-deformation histories are presented and discussed. Crashworthiness parameters such as load carrying capacity; energy absorption capability and failure mechanism have been discussed. The results presented in this study will help us to understand the behaviour and characteristics of Natural Fibre Composite as a filler material.

  • Quasi-static crushing behaviour of hybrid and non-hybrid Natural Fibre Composite solid cones
    Composite Structures, 2004
    Co-Authors: E Mahdi, Asmaa S. Hamouda, A. C. Sen
    Abstract:

    A comprehensive experimental investigation of the quasi-static axial crushing of hybrid and non-hybrid Natural Fibre/polyester Composite solid cones between flat platens has been carried out. The Composite solid cones were fabricated from two types of Natural Fibres namely oil palm Fibre and coir Fibre and different vertex angles varied from 0° to 60°. Typical load-deformation histories are presented and discussed. Crashworthiness parameters such as load carrying capacity; energy absorption capability and failure mechanism have been discussed. The results presented in this study will help us to understand the behaviour and characteristics of Natural Fibre Composite as a filler material. © 2004 Elsevier Ltd. All rights reserved.

A. C. Sen - One of the best experts on this subject based on the ideXlab platform.

  • Quasi-static crushing behaviour of hybrid and non-hybrid Natural Fibre Composite solid cones
    Composite Structures, 2004
    Co-Authors: E Mahdi, Asmaa S. Hamouda, A. C. Sen
    Abstract:

    A comprehensive experimental investigation of the quasi-static axial crushing of hybrid and non-hybrid Natural Fibre/polyester Composite solid cones between flat platens has been carried out. The Composite solid cones were fabricated from two types of Natural Fibres namely oil palm Fibre and coir Fibre and different vertex angles varied from 0° to 60°. Typical load-deformation histories are presented and discussed. Crashworthiness parameters such as load carrying capacity; energy absorption capability and failure mechanism have been discussed. The results presented in this study will help us to understand the behaviour and characteristics of Natural Fibre Composite as a filler material. © 2004 Elsevier Ltd. All rights reserved.

Fugen Daver - One of the best experts on this subject based on the ideXlab platform.

  • plasticised cellulose acetate Natural Fibre Composite
    World Journal of Engineering, 2013
    Co-Authors: C. Pang, Robert Shanks, Fugen Daver
    Abstract:

    Due to positive impact on the environment, biodegradable Composite materials are of growing interest. This study used cellulose acetate, a derivative of cellulose, as the matrix for its solubility and flexibility. Kenaf Composites have been used in furniture, ceiling panels, and fences. The aim is to prepare Composites with plasticized cellulose acetate and Natural Fibre. The kenaf Fibres were surface treated to remove impurities, in particular, hemicellulose, wax, and lignin. Chopped kenaf was added to dissolve cellulose acetate and cast on a Petri dish. After solvent has evaporated, the Composite was compression moulded. The thermal and mechanical properties of the kenaf cellulose acetate Composite were characterised. From thermogravimetry, the Composites were shown to be stable until moisture began evaporating. As a hydrophilic material, cellulose is sensitive to moisture. The mechanical properties of the Composites were analysed under high humidity. Dynamic mechanical analysis showed that these proper...

  • Plasticised cellulose acetate-Natural Fibre Composite
    World Journal of Engineering, 2013
    Co-Authors: C. Pang, K. Ing, Robert Shanks, Fugen Daver
    Abstract:

    Due to positive impact on the environment, biodegradable Composite materials are of growing interest. This study used cellulose acetate, a derivative of cellulose, as the matrix for its solubility and flexibility. Kenaf Composites have been used in furniture, ceiling panels, and fences. The aim is to prepare Composites with plasticized cellulose acetate and Natural Fibre. The kenaf Fibres were surface treated to remove impurities, in particular, hemicellulose, wax, and lignin. Chopped kenaf was added to dissolve cellulose acetate and cast on a Petri dish. After solvent has evaporated, the Composite was compression moulded. The thermal and mechanical properties of the kenaf- cellulose acetate Composite were characterised. From thermogravimetry, the Composites were shown to be stable until moisture began evaporating. As a hydrophilic material, cellulose is sensitive to moisture. The mechanical properties of the Composites were analysed under high humidity. Dynamic mechanical analysis showed that these properties changed slightly with humidity.