Crack growth and strain induced anisotropy in carbon black filled natural rubber

Busfield J. J. C., . and Ratsimba C. H., . and Thomas A. G., . Crack growth and strain induced anisotropy in carbon black filled natural rubber. pp. 131-141. ISSN 0127-7065

The work discussed outlines the development of a technique to predict failure of rubber components under repeated complex stressing. A fracture mechanics approach is adopted which has been shown to work with simple plane stress type geometry in the past. Real components with three dimensional loading and geometry can be examined with the use of finite element analysis techniques. These now allow us to investigate real fracture type problems to large strain deformations. To predict fatigue behaviour in components it is necessary to derive the energy release rate for that particular component which in general involves FEA techniques. Also it is important to know the crack growth characteristics of the material. This is usually expressed in terms of the rate of crack growth as a junction of the tearing energy (energy release rate). Conventional tearing energy crack growth rate tests are performed in relatively simple deformation modes using for example edge crack or pure shear test pieces. In practice components used in engineering undergo more complicated strain histories. In order to study these potential complexities in the crack growth characteristics the effect of pre-strain on cyclic crack growth behaviour using a predominantly pure shear test piece with an applied pre-strain has been studied. For the filled compounds studied so far there do appear to be complications and the observed crack growth rates may be substantially increased by these pre-strains. Some of these results are presented and their consequences discussed.

Full text available from: Official URL: http://vitaldoc.lgm.gov.my:8060/vital/access/servi...

Abstract

The work discussed outlines the development of a technique to predict failure of rubber components under repeated complex stressing. A fracture mechanics approach is adopted which has been shown to work with simple plane stress type geometry in the past. Real components with three dimensional loading and geometry can be examined with the use of finite element analysis techniques. These now allow us to investigate real fracture type problems to large strain deformations. To predict fatigue behaviour in components it is necessary to derive the energy release rate for that particular component which in general involves FEA techniques. Also it is important to know the crack growth characteristics of the material. This is usually expressed in terms of the rate of crack growth as a junction of the tearing energy (energy release rate). Conventional tearing energy crack growth rate tests are performed in relatively simple deformation modes using for example edge crack or pure shear test pieces. In practice components used in engineering undergo more complicated strain histories. In order to study these potential complexities in the crack growth characteristics the effect of pre-strain on cyclic crack growth behaviour using a predominantly pure shear test piece with an applied pre-strain has been studied. For the filled compounds studied so far there do appear to be complications and the observed crack growth rates may be substantially increased by these pre-strains. Some of these results are presented and their consequences discussed.

[error in script]

Item Type:	Article
AGROVOC Term:	Natural rubber
AGROVOC Term:	Rubber
AGROVOC Term:	Latex
AGROVOC Term:	Hevea
AGROVOC Term:	Carbon black
AGROVOC Term:	Elastomers
AGROVOC Term:	Fractures
AGROVOC Term:	Measurement
AGROVOC Term:	Experiments
AGROVOC Term:	Dimensions
Depositing User:	Ms. Suzila Mohamad Kasim
Last Modified:	24 Apr 2025 06:28
URI:	http://webagris.upm.edu.my/id/eprint/23343

Actions (login required)

View Item