Charts relating the compressive buckling stress of longitudinally supported plates to the effective deflectional and rotational stiffness of the supports

A stability analysis is made of a long flat rectangular plate subjected to a uniform longitudinal compressive stress and supported along its longitudinal edges and along one or more longitudinal lines by elastic line supports. The elastic supports possess deflectional and rotational stiffness. Such configuration is an idealization of the compression cover skin and internal structure of a wing and tail surfaces. The results of the analysis are presented in the form of charts in which the buckling-stress coefficient is plotted against the buckle length of the plate for a wide range of support stiffnesses. The charts make possible the determination of the compressive buckling stress of plates supported by members whose stiffness may or may not be defined by elementary beam bending and twisting theory but yet whose effective restraint is amenable to evaluation. The deflectional and rotational stiffness provided by longitudinal stiffeners and full-depth webs is discussed and numerical examples are given to illustrate the application of the charts to the design of wing structures

Autism Advocacy in Research

The following research concerning individuals with ASD aims to understand the perspectives of parents, caregivers, and professionals in the community. ASD is an extensively researched neurodevelopment disorder that accompanies sensory and social difficulties. Pervasive misconceptions surrounding ASD significantly impact the lifelong difficulties of individuals on the spectrum. Frequently marginalized from mainstream society, people with ASD confront the necessity to learn non-autistic ways of communicating, which can cause significant distress. This societal pressure often induces masking, a form of altering habits in order to successfully interact with non-autistic individuals. The following research solicited feedback from parents, clinicians, teachers, and advocates regarding their concerns and wishes on behalf of the autistic community with which they are affiliated. Data was collected through surveys, and participants were recruited from social media, specifically Facebook groups across the country. A series of six infographic posts were created for each question asked and the most common or noteworthy responses. This research demonstrates how society, schools, institutions, and individuals can create a more accommodating space for autistic individuals. With emphasis on the unique traits and capabilities of individuals rather than the diagnosis alone, this research contributes to the valuable body of knowledge available about individuals with ASD

An Analysis of the Stability and Ultimate Compressive Strength of Short Sheet-stringer Panels with Special Reference to the Influence of the Riveted Connection Between Sheet and Stringer

A method of strength analysis of short sheet-stringer panels subjected to compression is presented which takes into account the effect that the riveted attachments between the plate and the stiffeners have on the strength of panels. An analysis of experimental data shows that panel strength is highly influenced by rivet pitch, diameter, and location and that the degree of influence for a given riveting depends on the panel configuration and panel material

A Study of the Efficiency of High-strength, Steel, Cellular-core Sandwich Plates in Compression

Structural efficiency curves are presented for high-strength, stainless-steel, cellular-core sandwich plates of various proportions subjected to compressive end loads for temperatures of 80 F and 600 F. Optimum proportions of sandwich plates for any value of the compressive loading intensity can be determined from the curves. The efficiency of steel sandwich plates of optimum proportions is compared with the efficiency of solid plates of high-strength steel and aluminum and titanium alloys at the two temperatures

NACA Technical Notes

From Introduction: "The purpose of the present paper is to develop a simple method of calculating both the stress at which initial wrinkling occurs in muti-web beams and the ultimate bending strength of beams which are susceptible to this mode of instability.

NACA Technical Notes

Report presenting a stability analysis of a long flat rectangular plate subjected to uniform longitudinal compressive stress and support along its longitudinal edges and one or more other longitudinal lines by elastic line supports. This was performed in order to provide more information about stabilization methods for thin-wing construction. The effective stiffness of different supports and the buckling observed in different structures is provided

NACA Technical Reports

"A stability analysis is made of a long flat rectangular plate subjected to a uniform longitudinal compressive stress and supported along its longitudinal edges and along one or more longitudinal lines by elastic line supports. The elastic supports possess deflectional and rotational stiffness. Such configuration is an idealization of the compression cover skin and internal structure of a wing and tail surfaces" (p. 1)