Durability in the life cycle of polymer composites

Leterrier, Y.; Wyser, Yves; Månson, J.‐A. E.

doi:10.1002/(sici)1097-4628(19990822)73:8<1427::aid-app11>3.0.co;2-3

Cited by 4 publications

References 25 publications

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Durability study of a polymeric composite material for structural applications

Al-Haik

Garmestani

2001

Polymer Composites

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An experimental study was carried out to investigate the mechanical behavior of a structural carbon based composite for infrastructure industry. Creep and load relaxation experiments were conducted to investigate the rate sensitivity behavior for a temperature range of 20–60°C. The results show that the mechanical properties were degraded under elevated temperature conditions. A threshold stress was measured, at any given temperature, below which no observable strain rate is detected. Results show that load relaxation experiment can be used as an effective tool to study durability and long‐time creep behavior. The load relaxation test methodology for the prediction of model parameters was found to be more time and cost efficient than traditional long‐time creep tests.

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Durability study of a polymeric composite material for structural applications

Al-Haik

Garmestani

2001

Polymer Composites

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Life Cycle Engineering of Composites

Leterrier¹

2000

Comprehensive Composite Materials

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Wyser

Leterrier

Månson

2001

Journal of Materials Science

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The short-term mechanical strength of platelet-reinforced polymer composites was modeled using classical two-dimensional stress-transfer analysis. The stress field in the platelet and at the platelet/matrix interface was described in the presence of a matrix crack perpendicular to the interface. Modeling takes into account the tensile strength of the platelet, its adhesion to the matrix, and also considers the internal stress state resulting from processing. Platelet rupture and interface delamination were considered to be the two key failure mechanisms, depending on the ratio of platelet strength to interface strength. The transition between the two failure events was predicted to occur at a critical platelet length, the value of which depends on the elastic properties of the platelet and matrix, on the platelet geometry and strength, on the platelet/matrix adhesion, and on the internal stress state. The approach was applied to the case of low volume fraction silicon oxide platelets/poly(ethylene terephthalate) composites, where the size of the platelets was accurately controlled either below or above the predicted critical length. Compression molded composites, with perfect alignment of the platelets, and injection molded composites, were prepared and tested. The toughness of the compression molded composites was found to be accurately predicted by the strength model, with a 100% increase in the case of platelets smaller than the critical length compared to larger platelets. Injection molded composites with platelets larger than the critical length were found to fail without yielding. By contrast, when the platelets were smaller than the critical length, the injection molded composites exhibited excellent ductility. The general agreement obtained between the predicted and observed toughening transition shows the importance of filler size and stress state on the strength of platelet-reinforced composites.

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Durability in the life cycle of polymer composites

Cited by 4 publications

References 25 publications

Durability study of a polymeric composite material for structural applications

Durability study of a polymeric composite material for structural applications

Life Cycle Engineering of Composites

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