Abstract
The modulus and fracture toughness of an ATH-filled PMMA composite are determined as a function of temperature. The modulus can be modelled as a series addition of the two phases, giving a decreasing modulus with temperature tending to zero at 110°C. The K1C value remains constant. Fatigue crack growth data in the form of da/dN versus K were obtained as a function of temperature and modelled using the Paris Law. The power index remained constant at 7.5, but the coefficient had a maximum at 50°C. It is suggested that this arises from microcracks generated by interparticle thermal stresses which are shown to have a maximum at the same temperature (50°C). A two-stage zone fatigue crack growth model was also applied to the data and gave a damage stress which correlated with the thermal stress and suggested a criterion based on achieving a constant energy per unit area.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
US Patent 3,847,865 Nov. 12 (1974) “Use of Aluminum Trihydrate in a Poly Methyl Methacrylate Article.
O. OBAKPONOVWE, PhD Thesis “Temperature Effects in Fatigue of Alumina-Filled PMMA,” Imperial College London (Aug. 2003).
G. P. MARSHAL, L. H. COUTTS and J. G. WILLIAMS, J. Mater. Sci. 9 (1974) 1409.
ISO 13586 (2000) “Plastics—Determination of Fracture Toughness (GC and KC)—an LEFM approach.
J. G. WILLIAMS, “Fracture Mechanics of Polymers” (Ellis Horwood Ltd. 1987).
ISO 15850 (2002) “A Protocol for Tension-tension Fatigue Crack Propagation Testing in Plastics”.
J. G. WILLIAMS, J. Mater. Sci. 12 (1977) 2525.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Obakponovwe, O., Williams, J.G. Temperature effects on the fatigue of highly filled PMMA. J Mater Sci 41, 437–443 (2006). https://doi.org/10.1007/s10853-005-2471-0
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10853-005-2471-0