Compression and shear buckling performance of finite length plates with bending-twisting coupling

Abstract

This article investigates the compression and shear buckling performance of finite lengthBending-Twisting coupled laminated plates with simply supported edges. New contour maps are developed, representing non-dimensional buckling factors, which are superimposed on the lamination parameter design spaces for laminates with standard ply orientations. Changes in buckling mode for finite length plates complicate the contour maps, which are shown to be continuous only within discrete regions of the lamination parameter design space and are strongly influenced by plate aspect ratio. The contour maps also serve to demonstrate the degrading effect of Bending-Twisting coupling on compression buckling performance as well as providing new insights into shear buckling performance improvements, including optima that are non-intuitive. The adoption of two recently developed laminate databases, to which common design rules are now applied, including ply percentages and ply contiguity constraints, ensure that the conclusions drawn are based on practical rather than hypothetical designs.

Laminate stiffness tailoring for improved buckling performance

“…The results presented here therefore adopt an equivalent isotropic laminate datum to bridge the gap between metallic and composite behaviour. Buckling results for composite plates with finite length can also be found elsewhere [16].…”

“…The limitations related to design selection and also buckling performance above the so called black metal design, particularly the skin panels designs of Tables 3. All other designs within this specific range of balanced and symmetric designs possess Bending-Twisting coupling, which can result in up to a 10% reduction buckling strength [14][15][16].…”

Influence of vibration on the grain flow sensor during the harvest and the difference elimination method

“…For example, contour maps were used to represent the changes in CO emissions with engine load and biodiesel content [38] . Another example is that Lee et al [39] realized the actual stack design with bending-twist coupling by superimposing the contour map on the stack parameter design space. In precision agriculture, the distribution of soil nutrient content, moisture content, distribution of diseases and insect pests, and grain yield distribution can also be represented by contour lines.…”