Assessment of the interlaminar behaviour of a carbon fabric reinforced thermoplastic lap shear specimen under quasi-static and tension-tension fatigue loading

Abstract

Although fusion bonded joints have already been extensively studied, they are only rarely compared to benchmark specimens with the same interlaminar behaviour of the composite material being joined, especially for the lapshear geometry. Even more, an extensive study of these benchmarks under quasi-static and fatigue loading conditions as almost never considered. In this manuscript, a method of producing such benchmark lapshear specimens is presented for a hot pressed carbon fabric reinforced thermoplastic. The mechanical behaviour of these specimens is then assessed using quasi-static, hysteresis and tensiontension fatigue experiments. It could be concluded that the considered approach worked well for this material and reproducible results and values were found. With respect to the material, no crack growth was visible during the quasi-static experiments, except near the very end of life, whereas significant crack growth was present during fatigue experiments.

Thermal aging effects on overall mechanical behavior of short glass fiber‐reinforced polyphenylene sulfide composites

“…These authors moved further to examine the inter‐laminar behavior of a carbon fabric reinforced PPS by using lap experiments and they considered several loading conditions. The results showed that no crack growth was observed , both under quasi‐static loading until failure and successive loading‐unloading stages with increasing maximum load. Kytýr et al also evaluated impact damage effect on residual fatigue life of PPS composites reinforced by carbon fibers.…”

Overall Investigation of Poly (Phenylene Sulfide) from Synthesis and Process to Applications—A Review

“…They found the constructed S–N curves shifted their trends dramatically at the maximum cyclic stress. In addition, Baere et al . examined the interlaminar behavior of a 5‐harness carbon fabric reinforced PPS by using lap experiments, they considered the quasi‐static, hysteresis, and fatigue loading conditions and they found that under quasi‐static loading, both until failure and with continuously loading and unloading with an increasing maximum load, there was no crack growth.…”

An unsupervised pattern recognition approach for AE data originating from fatigue tests on polymer–composite materials

“…The GK algorithm is thus applied to estimate the parameters of a given set of k clusters on AE originated from QS tests. To cope with possibly additional AE sources that can occur during fatigue [28], an additional k + 1 th cluster is estimated based on fatigue data to include all feature vectors located "far" from the previous k clusters. For that, the boundary of each cluster characterized on QS tests is estimated by the average of the Mahalanobis-like distance (used in GK) [24].…”