Structural Engineering and Structural Components: A Wood Truss Case Study

2009 ◽  
pp. 501-510
Author(s):  
Stewart Verhulst ◽  
Deepak Ahuja
Keyword(s):  
Structural Engineering ◽  
Structural Components

The Use of Aluminium for Commercial Vehicle Structures—A Feasibility Study

1978 ◽  
Vol 192 (1) ◽  
pp. 81-92
Author(s):  
B. B. Hundy ◽  
S. Broadstock
Keyword(s):  
Structural Analysis ◽  
Aluminium Alloy ◽  
Feasibility Study ◽  
Commercial Vehicle ◽  
Load Capacity ◽  
Typical Case ◽  
Extra Cost ◽  
Manufacturing Processes ◽  
Structural Components

The use of aluminium alloy instead of steel for the structural components of a 32 ton articulated lorry has been examined. The probable manufacturing difficulties have been assessed and shown to be minimal. The savings in weight possible by using aluminium have been calculated from a structural analysis of the cab, tractor chassis and trailer and from this and an assessment of the manufacturing processes the extra cost of manufacturing in aluminium has been determined. A typical case study shows that this extra cost can be easily recovered by utilising the increased load capacity of the vehicle during the first few years of its life.

On three-dimensional printing of 17-4 precipitation-hardenable stainless steel with direct metal laser sintering in aircraft structural applications

2021 ◽  
pp. 146442072110448
Author(s):  
Rupinder Singh ◽  
Rishab ◽  
Jashanpreet S Sidhu
Keyword(s):  
Stainless Steel ◽  
Structural Engineering ◽  
Three Dimensional ◽  
Surface Hardness ◽  
Dimensional Accuracy ◽  
Scanning Speed ◽  
Laser Sintering ◽  
Structural Components ◽  
Direct Metal Laser Sintering ◽  
Structural Applications

The martensitic 17-4 precipitation-hardenable stainless steel is one of the commercially established materials for structural engineering applications in aircrafts due to its superior mechanical and corrosion resistance properties. The mechanical processing of this alloy through a conventional manufacturing route is critical from the dimensional accuracy (Δ d) viewpoint for development of innovative structural components such as: slat tracks, wing flap tracks, etc. In past two decades, a number of studies have been reported on challenges being faced while conventional processing of 17-4 precipitation-hardenable stainless steel for maintaining uniform thickness of aircraft structural components. However, hitherto little has been reported on direct metal laser sintering of 17-4 precipitation-hardenable stainless steel for development of innovative functional prototypes with uniform surface hardness (HV), Δ d, and surface roughness ( Ra) in aircraft structural engineering. This paper reports the effect of direct metal laser sintering process parameters on HV, Δ d, and Ra for structural components. The results of study suggest that optimized settings of direct metal laser sintering from multifactor optimization viewpoint are laser power 100 W, scanning speed 1400 mm/s, and layer thickness 0.02 mm. The results have been supported with scanning electron microscopy analysis (for metallurgical changes such as porosity (%), HV, grain size, etc.) and international tolerance grades for ensuring assembly fitment.

scholarly journals THE DEVELOPMENT OF SOCIAL BELONGING AND CHANGES IN LIFESTYLE FOR WOMEN IN FITNESS: CASE STUDY

2017 ◽  
Vol 3 ◽  
pp. 334
Author(s):  
Aleksandra Čuprika ◽  
Andra Fernāte ◽  
Leonīds Čupriks
Keyword(s):  
Structural Component ◽  
Healthy Lifestyle ◽  
Well Being ◽  
Structured Interview ◽  
Daily Basis ◽  
Structural Components ◽  
Promotion Programme ◽  
The Social ◽  
Social Belonging

Fitness as a healthy lifestyle implementation helps to improve the social, mental and physical well-being components. Several scientists have indicated that there is a connection between social belonging and physical activity (PA) as the structural component of a healthy lifestyle (Walseth, 2006; Walseth & Fasting, 2004; Antonsich, 2010; Yuval-Davis, 2006; Anthias, 2006; Pinquart & Sorensen, 2001; Everard et. al., 2000). That is why the goal of the research is to develop and apply a social belonging promotion programme for women in fitness programme and to determine the changes in the lifestyle structural component health promoting PA. 10 women involved in fitness classes in small groups (2-4 people) participated in the case study, where in addition to PA social belonging promotion events were organized for all women together. In order to evaluate the structural components of social belonging and PA level and type, questionnaires adapted in Latvia and a semi-structured interview was used. Applying the social belonging promotion programme for women in fitness creates statistically significant changes in such structural components as sense of commitment (p<0.01), perception of interpersonal relations (p<0.01). By additionally promoting social belonging in fitness, women perceive the group better, are willing to spend more time with it; that, in turn, positively affects the willingness to be physically and socially active on a daily basis.

Fracture of Scantling Support Structure of Gas Processing Module on FPSO

2014 ◽  
Vol 66 (2) ◽  
Author(s):  
F. M. Mufti ◽  
Efi Afrizal ◽  
E. B. Djatmiko ◽  
Murdjito Murdjito ◽  
Jaswar Jaswar
Keyword(s):  
Integral Method ◽  
Fracture Propagation ◽  
J Integral ◽  
Environmental Load ◽  
Structural Components ◽  
The Finite Element Method ◽  
Support Structure ◽  
Gas Processing ◽  
Processing Module

Floating Production Storage and Offloading (FPSO) in its operation is significantly affected by the environmental load as well as operational loads. These loads indirectly affect the structural components such as modules and its supports structures onboard of the FPSO. Investigation of fracture propagation has been carried out on the scantling support structure system of gas processing module. Modeling the structure with the finite element method (FEM) approach was performed by utilizing ANSYS 11.0 software. The fracture propagation evaluation is accomplished by elastic-plastic fracture mechanics with J-Integral method on crack first-mode (opening crack) accordance with DNV-OS-F201. As case study, FPSO Belanak operated at Conoco Block B in Natuna, Indonesia was investigated.

Manipulating Structure in Institutional Complexity Scenarios: The Case of Strategic Planning in Nonprofits

2020 ◽  
pp. 000765032092733
Author(s):  
Ziva Sharp
Keyword(s):  
Strategic Planning ◽  
Nonprofit Organizations ◽  
Planning Process ◽  
Comparative Case Study ◽  
Structural Components ◽  
Institutional Complexity ◽  
Shape Structure ◽  
Social Logic

Emergent structural approaches to institutional complexity tend to inhibit the role of agency in addressing logic multiplicity scenarios. Prior studies of logic multiplicity have documented a diverse set of outcomes, ranging from domination through hybridization, and characterized by various levels of conflict. A new stream of research has emerged that seeks to explain this heterogeneity through the structural components of complexity. These studies tend to minimize the role of agency in institutional complexity scenarios, positing that outcome diversity, and the organization’s ability to exert agency, can be accounted for by the interaction of exogenously determined parameters, such as centrality, compatibility, prioritization, and jurisdictional overlap. This article revisits the role of agency in these models, suggesting that agency is not only framed by, but may itself shape, structure. The article draws on a comparative case study in five Israeli nonprofit organizations, focusing on the introduction of the business logic through a strategic planning process, and the challenge that this represents for the legacy social logic. The case studies demonstrate that organizations regularly use a set of distinctive mechanisms to manipulate the structural components of complexity, and, in so doing, agentically regulate logic multiplicity outcomes.

“Premit” System for Space Reticulated Structures

2003 ◽  
Vol 18 (1) ◽  
pp. 61-72
Author(s):  
Vincenzo Dipaola ◽  
Giuseppe Prete
Keyword(s):  
Static Analysis ◽  
Structural Characteristics ◽  
Parametric Modelling ◽  
Structural Components ◽  
Structural Process ◽  
The Third ◽  
Application Potential ◽  
Design Requirements ◽  
Technical Solutions

This is the third of three papers where we present the application potential of an original structural process for steel space grids, named PREMIT System. Here we explain the geometrical and structural characteristics of the welded version of the proposed System. Moreover we carry out the static analysis of structural components and we present a parametric modelling. Finally a codification and an inventory of technical solutions, useful to satisfy the design requirements of a wide applicative case study, are proposed. In the Appendix we present two System's variants, valid for both the bolted and the welded versions, with the aim to achieve appreciable economies in terms of materials and manufacturing.

scholarly journals A component-level methodology to evaluate the seismic repair costs of infills and services for Italian RC buildings

2020 ◽  
Vol 18 (14) ◽  
pp. 6533-6570 ◽  
Author(s):  
Maria Teresa De Risi ◽  
Carlo Del Gaudio ◽  
Gerardo Mario Verderame
Keyword(s):  
Large Scale ◽  
Residential Buildings ◽  
Structural Components ◽  
Rc Buildings ◽  
Component Level ◽  
Building Stock ◽  
Damage Level ◽  
Repair Costs ◽  
Electric Equipment

Abstract The reliable estimation of seismic losses due to damage to buildings is paramount for the post-emergency management and the planning of recovery activities. For residential reinforced concrete (RC) infilled buildings, a significant role in the computation of seismic loss is played by non-structural components, above all infills, partitions and services, as shown in past earthquakes. In this work, a component-based methodology is proposed to assess seismic losses for residential RC buildings in Mediterranean region. The attention is focused on the repairing activities for masonry infills (typical enclosure or partitions elements in Italian and Mediterranean RC buildings), and for services (plumbing systems, electric equipment, floor/wall tiles…), commonly enclosed within the infill panels for the considered building typology. The described methodology can be used starting from the expected damage level to infills and partitions. It adopts given repair unit costs at different damage states of infills. The loss estimation methodology has been, first, validated by comparing predicted and actual repair costs for specific case-study buildings damaged by L’Aquila (Italy) 2009 earthquake. Then, the methodology has been applied to a wide dataset of RC buildings (about 2500 residential buildings) damaged by L’Aquila earthquake available from the literature, to show its possible application at a large-scale level. A good agreement between observed and predicted costs is obtained both for specific case-study buildings and for the wider building stock, especially when damage to structural components is very limited.

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