This paper presents an experimental, numerical and analytical study of the behaviour of thin-walled plates connected by a single bolt under shear. Eighteen tests were carried out to provide detailed data of load-deflection and load-strain curves for validation of the finite element simulation model. The validated finite element model was then used to perform a comprehensive set of parametric studies to investigate the effects of different design parameters on the connected plate behaviour, including initial stiffness, ultimate resistance and maximum deformation at the ultimate resistance. It was found that the stiffness and ultimate resistance could be predicted accurately by using existing methods. The analytical study therefore focused on developing a method to calculate the maximum plate deformation (hole elongation) at the ultimate resistance. Based on the parametric study results, methods of calculating the ultimate deformation were proposed, based on different failure modes of the connection.
This paper presents a numerical and analytical study of the behavior of thin-walled plates connected by multiple bolts under shear. A validated finite element model has been used to perform a comprehensive set of parametric studies to investigate the effects of different design parameters on the connected plate behavior, including initial stiffness, ultimate resistance and maximum deformation at the ultimate resistance. The design parameters include edge and end distances, bolt spacing, number of bolts along and perpendicular to the loading direction and elongation limit of steel. It has been found that the existing methods for calculating the stiffness and ultimate resistance are directly applicable. The main focus of this paper is the maximum plate deformation at the ultimate plate resistance. Based on the parametric study results, it has been found that strain distributions around the bolt holes for different failure modes, as proposed by the authors for plate connected by a single bolt, are still applicable. However, it is necessary to modify the plate dimension ranges within which the different strain distributions apply to recognize the difference in failure modes for plates with different bolt arrangements.
Straw wire aircraft sandwich panel is a new type of composite slab which consist of straw insulation core lamped between two welded wire meshes. Diagonal shear connectors connect two wire meshes to form an integrated frame. The straw insulation core (also known as straw board) is prepared from cut straw agglutinated by magnesium oxychloride cement (MOC). In order to study thermal conductivity of straw board, multi-group models were quantitatively investigated by the CD-DR3030A thermal conductivity meter. Five parameters, including the water-cement ratio, cement content, straw gradation, straw length, wettability were considered in the test. The results show that the thermal conductivity of straw board samples is in the range of 0.08~0.12 w/m•k, which indicates that the straw board has a good thermal insulation property. And the water-cement ratio, cement content, straw gradation, straw length, wettability has remarkable effects on the thermal conductivity of straw board.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.