Parametric plastic collapse loads and their validation for horizontal saddle supported storage vessels

In general, progressive plastic collapse occurs in vessels with low values of R/t ratio, typically less than 200, and elastic-plastic buckling is observed in vessels with higher R/t ratios. The aim of this paper is to examine various theoretical analyses for plastic collapse loads, applicable to vessels with low values of R/t ratio, and compare these with the experimental results obtained by the authors and others

The buckling and collapse behaviour of saddle-supported cylinders - Keynote Lecture

Recent work by the present authors on the collapse conditions for horizontal cylindrical saddle supported storage vessels is described and reviewed. Attention is directed to a range of geometries, typically R/t < 200, where plastic collapse type failure may be relevant. A series of forty tests on end-supported model cylinders loaded centrally by a rigid saddle were performed and a variety of theoretical methods were used for comparison with the test results. It was found that the best agreement was obtained by using an elasticplastic finite element analysis approach. The results of a parametric survey based on the elastic-plastic finite element method are summarised. The paper reports some validation checks, which have been performed to support the parametric results

The politics of the doorstep : female survival strategies and the legacy of the miners’ strike 1984–85.

This paper considers the legacy of continuing activism of women in the North East of England who organized in support of the 1984-85 miners' strike. It refers to the traditional responsibility of women in mining localities for the maintenance of neighbourhood and kin relations and using the example of a key activist in one ex-mining village, it argues that the values associated with 'mining community' remain relevant as a reference point for a self-conscious, politicized reshaping of local relationships in post-industrial conditions. The material basis for this self-conscious approach has shifted from the masculine sphere of mining work and its associated community institutions to the feminized sphere of location and neighbourhood

Entrepreneurial dynamics and social responsibility: mapping an expanded intellectual territory

Objectives: (1) To provide a constructive critique of the interface between the entrepreneurial growth dynamics research and social responsibility literatures; (2) to explore opportunities for making new connections between these literatures in order to address substantive ‘gaps’ in research and policy-making ; (3) to map the broader intellectual territory implied by this critique; (4) to outline a tentative research agenda. Prior work: The paper draws on two main strands of research: entrepreneurial growth dynamics and (corporate) social responsibility. While much has been achieved in the social responsibility literature with regards to established practices, we argue that insufficient attention has been paid to the more ‘entrepreneurial’ dimensions. At the same time, the current wave of enthusiasm for new models of socially-responsible enterprise has opened up a series of new research questions, including: (i) how are these organisational forms likely to grow and develop over the longer-term, at an intra-organisational level, and in terms of emerging inter-organisational relationships?; (iii) how will other actors respond to these developments?; (ii) what are the implications of the resulting dynamics for social, environmental and economic sustainability? Approach: The paper is based around a critical review of the relevant literatures, focusing on the role of entrepreneurial opportunity and capabilities in shaping entrepreneurial growth dynamics. The discussion addresses current methodological debates and considers how social responsibility can be integrated into the analysis. In doing so, it builds on a research tradition that has promoted historically-informed multi-level and co-evolutionary analysis and argues that such techniques are required in order to gain a better understanding of these phenomena. Results: We outline a research agenda, illustrated with a number of questions of particular relevance to researchers, policy-makers and practitioners Implications: The paper identifies a number of issues for researchers and policy-makers and practitioner audiences. It calls for a broadening of the intellectual territory around socially-responsible enterprise. Process-based and multi-level analysis of growth dynamics extends its temporal and organisational boundaries to encompass longer-term interactions and a wider range of actors. Value: The paper is designed to facilitate and to encourage more constructive interaction between research communities concerned with: social responsibility, social enterprise and process-based approaches to entrepreneurship. It advances understanding by mapping an intellectual space that is neither fully revealed in, nor adequately addressed by, existing bodies of knowledge

The strongly regular (45,12,3,3) graphs

Using two backtrack algorithms based on dierent techniques, designed and implemented independently, we were able to determine up to isomorphism all strongly regular graphs with parameters v = 45, k = 12, &#955; = &#956; = 3. It turns out that there are 78 such graphs, having automorphism groups with sizes ranging from 1 to 51840

On the plastic collapse of horizontal saddle supported storage vessels

The present paper summarises a comprehensive programme of work on collapse loads of horizontal cylindrical saddle supported storage vessels. A programme of tests was conducted on 40 model vessels that included both welded and loose saddles. Different collapse behaviours were observed depending largely on the radius to thickness ratio of the vessels. A range of theoretical approaches were explored and compared with the experimental results. The best theoretical comparison was then used to conduct a parametric survey covering a total of 218 cases. The results of the survey have been presented in the form of simple design graphs

The Social Role of Design on Collaborative Destination Branding: Creating a new journey, a new story for the Waterfall Way, New South Wales, Australia

This paper suggests that collaborative design can be an effective tool to promote social change. A co-design methodology and the results of its application in branding the Waterfall Way (New South Wales, Australia) as an eco- and nature-based tourism destination are presented as an example. The co-design exercise actively involved stakeholders in all stages of the design process, harnessing local tacit knowledge in relation to communication design, stimulating reflection upon what is special about the places, and consequently reinforcing a sense of belonging and the environmental and cultural conservation of place. The achieved results reflect the involvement and ownership of the community towards the design process. However, the application of a collaborative brand design methodology produced more than just a destination brand that is attractive to visitors, in line with local values, ways of living and the environment. It helped to catalyse a social network around tourism, triggering self-organising activity amongst stakeholders, who started to liaise with each other around the emergent regional identity - represented by the new brand they created together. The Waterfall Way branding process is a good example of social construction of shared understanding in and through design, showing that design exercises can have a significant social impact not only on the final product, but also on the realities of people involved in the process. Keywords: Destination Branding; Collaborative Process; Social Design; Self Organising Systems; Sustainable Tourism</p

Horizontal saddle-supported storage vessels: Theoretical and experimental comparisons of plastic collapse loads

Previous experimental work (1) on cylindrical vessels supported at the ends and subjected to central loading indicated that different collapse mechanisms could occur when the loading is applied either through loosely fitted saddles or through welded saddles. The modes of failure are dependent upon the value of the R/t ratio of the vessel. In general, progressive plastic collapse occurs in vessels with low values of R/t ratio, typically less than 200, and elastic-plastic buckling is observed in vessels with higher R/t ratios. The aim of this paper is to examine various theoretical analyses for plastic collapse loads, applicable to vessels with low values of R/t ratio, and compare these with the experimental results obtained by the authors and others. The theoretical behaviour appropriate for the thinner vessels, where the mode is failure is by buckling, has been previously examined by the authors elsewhere (2) although all the experimental values are included here for completeness. A number of classical and numerical analytical methods are employed to obtain the plastic collapse loads. Comparisons with the experimental results show that the elastic-plastic finite element analysis gives the best agreement. Further work in the form of a parametric study has been conducted on a range of vessels to enable a design method to be established. This is published as a companion paper in this volume