Bifurcation buckling from a membrane stress state

2012 ◽  
Vol 90 (7) ◽  
pp. 867-881 ◽  
Author(s):  
Herbert A. Mang ◽  
Gerhard Höfinger
Keyword(s):  
Stress State ◽  
Membrane Stress ◽  
Bifurcation Buckling

Stress State Around an Elliptic Hole in a Conical Shell Under Tension

1973 ◽  
Vol 95 (1) ◽  
pp. 201-207 ◽  
Author(s):  
S. I. Chou
Keyword(s):  
Stress State ◽  
Conical Shell ◽  
Elliptic Hole ◽  
Cone Angle ◽  
Major Axis ◽  
Membrane Stress ◽  
Arbitrary Angle ◽  
Crack Problems ◽  
Curvature Parameter ◽  
Square Root Singularity

Membrane stress state around an elliptic hole in a conical shell under tension is determined by perturbation in terms of a nondimensional cone angle ε and a nondimensional curvature parameter β. Stress state around the hole in terms of the eccentricity of the elliptic hole whose major axis makes an arbitrary angle with the axis of the shell is given. For a crack making an arbitrary angle with the axis of the shell, stress state in the vicinity of the crack tip is given and shows the inverse square root singularity peculiar to crack problems.

Short Stress State Questionnaire

2015 ◽  
Vol 31 (1) ◽  
pp. 20-30 ◽  
Author(s):  
William S. Helton ◽  
Katharina Näswall
Keyword(s):  
Stress State ◽  
Factor Structure ◽  
Human Performance ◽  
Self Report ◽  
Confirmatory Factor ◽  
Stress States ◽  
Related Stress ◽  
Using Data ◽  
Task Conditions ◽  
Multiple Samples

Conscious appraisals of stress, or stress states, are an important aspect of human performance. This article presents evidence supporting the validity and measurement characteristics of a short multidimensional self-report measure of stress state, the Short Stress State Questionnaire (SSSQ; Helton, 2004 ). The SSSQ measures task engagement, distress, and worry. A confirmatory factor analysis of the SSSQ using data pooled from multiple samples suggests the SSSQ does have a three factor structure and post-task changes are not due to changes in factor structure, but to mean level changes (state changes). In addition, the SSSQ demonstrates sensitivity to task stressors in line with hypotheses. Different task conditions elicited unique patterns of stress state on the three factors of the SSSQ in line with prior predictions. The 24-item SSSQ is a valid measure of stress state which may be useful to researchers interested in conscious appraisals of task-related stress.

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