Buckling loads of CFRP composite cylinders under combined axial and torsion loading – experiments and computations

Instability of imperfect composite cylindrical shells under combined loading

“…Therefore, it can be said that when the cylinder is subject to torsion alone it is virtually imperfection-insensitive. This agrees with the analytical results of Simitses el al [17] and experimental results of Meyer-Piening et al [30].…”

“…[18] consists of a comprehensive study on the stability of cylindrical steel shells under combined loading. Thus, very limited information on the instability response of composite shells under combined loading is available [19][20][21][22][23][24][25][26][27][28][29][30] and most of it does not consider the postbuckling response which, if considered, will result in significant cost savings. Most of the published data deals with the buckling response of compression-loaded composite shells.…”

Nondestructive Testing of Polymers and Polymer–Matrix Composites

“…In moiré methods (112,113), fine pitch gratings can be used, because the imaged fringes are demodulated by a reference grating in front of the camera before recording. Moiré methods are usually used to measure deformations or to compare the shape of objects, for example, in production control, with a resolution of roughly 1/10,000 of the field of view (114)(115)(116). An application to PMC is described in Ref.…”

Experimental and numerical study on buckling of axially compressed composite cylinders

“…[15] There are are number of studies performed on post-buckling of composite cylinders, which included measuring of initial imperfections and applying to numerical models. These investigations include works by Meyer-Piening et al [16] and Bisagni et al [17]. Employing the updated models, fair agreement of experimental and numerical results has been achieved for torsional loading.…”