R. A. Duckett

TL;DR: In this paper, a modification of a theory proposed by Robertson, which uses the internal viscosity approach to yield in glassy polymers, was shown to explain the temperature and strain-rate dependence of the yield stress and provides a quantitative explanation of the differences in behaviour between tension and compression in terms of the dependence of yield on the hydrostatic component of the applied stress.

TL;DR: In this paper, a series of composite panels has been prepared by laminating unidirectional prepreg tapes of epoxy resin reinforced with continuous carbon fibres, each panel was a balanced, symmetrical laminate with the plies alternating at ± θ to a reference direction where θ = 0, 10, 15, 20, 25, 30 and 40°.

TL;DR: In this article, the 3D fiber orientation of a single-gated injection-moulded plaque of short-glass-fibre-reinforced Nylon was measured by using a purpose built image analysis facility, which allows 3D data to be obtained.

TL;DR: In this paper, structural measurements were carried out on three polyethylene samples before and subsequent to different levels of tensile deformation, and the results showed that the first yield point marks the onset of a recoverable reorientation process of the lamellae within the spherulites.

TL;DR: In this paper, the temperature, strain-rate, and pressure dependences of the yield stress have been determined for two polyethylene homopolymers of differing molecular weights and for a polyylene copolymer.