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Design Creation and Engineering Analysis: ABST Assessment Answer

You are tasked with completing one of three design topics, which incorporates and integrates fundamental concepts from the course. You will need to choose a design topic, create your design to a detailed concept level (via equations, drawings, etc), complete a thorough engineering analysis using your knowledge of Statics & Structures, provide a write-up, and present your project to the class. 

Important: your final project must demonstrate a deep and thorough engineering analysis that incorporates at least three of the following fundamental concepts: statics of particles, equivalent force and moment systems, rigid bodies, equilibrium of rigid bodies in two and three dimensions, analysis of truss and frame structures, internal loading, deformation and stress, distributed force systems, friction, centroid, or moment of inertia. Consideration will be given to projects that incorporate analysis of more than three of these fundamental concepts. 

The engineering analysis should address key questions or concerns that are relevant to your design topic, and clearly demonstrate that you are able to synthesize concepts from class in an applied and guided (and hopefully fun!) project. Questions/concerns could include whether your design is physically possible, is likely to be easily damaged or fail/break, can be fabricated or manufactured easily, is useful or meaningful to users, among other possibilities. The point is to convey that you have carefully thought through your design, and could make it work if given sufficient time and financial resources. 

Open-Ended Project: Design and analyze something of your own creation. Your design should not be of an existing product, structure, frame, machine, etc., but rather should be something that is new and original, and provides some kind of utility or usefulness. This project is meant to be potentially broad, to capture a wide range of “other” projects that do not fit in the Art Patron or Venture Capitalist categories. 

Written Report 

A final description and analysis of your design will be communicated via a written report. You will need to provide a report that conforms to the following format (note: template provided via in another file!): 

  • Maximum Length: 3 pages front/back (i.e. maximum 6 pages total). 
  • Margins: 0.5 inches 
  • Font: Arial 11 pt, single spaced. 
  • Figures: Maximum of 4, can have multiple figure subpanels 
  • Equations: (encouraged!) Should be embedded within the written document 
  • Section Elements and Headings: Should include the following: “Title”, “Abstract”, “Introduction” or “Motivation”, “Methods”, “Results and Discussion”, “Conclusion”, “Creativity” (statement should be maximum of 3 sentences – should communicate what you think is imaginative/artistic/original about your design), “Innovation” (statement should be maximum of 3 sentences – should communicate how the design is considered new), “Impact and Significance” (statement should be maximum of 3 sentences – should 

communicate how your design is important and meaningful) 

  • Engineering Analysis: Should be clearly explained and detailed. At least three 

fundamental topics should be included and analyzed. 

Grading 

75% Write Up and Fundamental Engineering Analysis .

15% Justification of Creativity

10% Inclass presentation

Answer

ABST

ABST

A truss that is assumed to comprise members that are connected by means of pin joints, and which is supported at both ends by means of hinged joints or rollers, is described as being statically determinate.Newton's Laws apply to the structure as a whole, as well as to each node or joint. In order for any node that may be subject to an external load or force to remain static in space, the following conditions must hold: the sums of all horizontal forces, all vertical forces, as well as all moments acting about the node equal zero. Analysis of these conditions at each node yields the magnitude of the forces in each member of the truss. These may be compression or tension forces.

INTRODUCTION

Trusses that are supported at more than two positions are said to be statically indeterminate, and the application of Newton's Laws alone is not sufficient to determine the member forces. In order for a truss with pin-connected members to be stable, it must be entirely composed of triangles. In mathematical terms, we have the following necessary condition for stability:

METHODS         

M +R ≥ 2j

where

m =total number of truss members

j= total number of joints

r= number of reactions (equal to 3 generally)

When m = 2j − 3, the truss is said to be statically determinate, because the (m+3) internal member forces and support reactions can then be completely determined by 2j equilibrium equations, once we know the external loads and the geometry of the truss. Given a certain number of joints, this is the minimum number of members, in the sense that if any member is taken out (or fails), then the truss as a whole fails. While the relation (a) is necessary, it is not sufficient for stability, which also depends on the truss geometry, support conditions and the load carrying capacity of the members.

RESULTS AND DISCUSSION

Some structures are built with more than this minimum number of truss members. Those structures may survive even when some of the members fail. They are called statically indeterminate structures, because their member forces depend on the relative stiffness of the members, in addition to the equilibrium condition described.

equilibrium condition of statically indeterminate structures 1

equilibrium condition of statically indeterminate structures 2

equilibrium condition of statically indeterminate structures 3

equilibrium condition of statically indeterminate structures 4

equilibrium condition of statically indeterminate structures 5

equilibrium condition of statically indeterminate structures 6

 In a statically indeterminate truss, static equilibrium alone cannot be used to calculated member force. If we were to try, we would find that there would be too many “unknowns” and we would not be able  to complete the calculations. Instead we will use a method known as the flexibility method, which uses an idea know as strain energy. The mathematical approach to the flexibility method will be found in thte most appropriate text books. Statically indeterminate can be two types

External Indeterminate

It related with the reaction, it could be determinate if the number of reactions of the structure exceed than determinate structures by using static equation. 

Internal Indeterminate.

It related with the framework construction. Some of framework or trusses should have an adequate number of members for stability indentions. If inadequate members were detected, structure is classified as unstable, meanwhile, while the redundant number of members were determined, the structures is classified as statically indeterminate.

Basically the flexibility method uses the idea that energy stored in the frame would be the same for a given load whether or not the redundant member whether or not. In other word, the external energy = internal energy. In practice, the loads in the frame are calculated in its “released” from (that is, without the redundant member) and then calculated with a unit load in place of the redundant member. The values for both are combined to calculate the force in the redundant member and remaining members. The redundant member load in given by:

CONCLUSION

In this experiment, we use few type of different load from 50N till 250N to evaluate the data from the trusses. The most important of these criteria is the structure’s ability to carry load safely. The limit load for this equipment is 350N. The calculation to evaluate of structural safety can only be done mathematically and the experimental force data that we collected from digital reading than be compared with the theoretical force value that be done manually as we studied in analysis structure module. As the graph load vs. deflection is been plotted, the result was as similar to the linear.

Some mistake when reading the value, this is parallax error. And the equipment is not in a good condition. It would be impractical, uneconomical, and unsafe for the structural engineer to evaluate a bridge design by building a full-size prototype.  When a structure is built, it must be stiff enough to carry its prescribed loads and fully corrected when reading the value. There will be a small “ralat” in every experiment and it can’t be avoided but any how we should prevent it so that it will not affect the calculation or stiffness of the structure

JUSTIFICATION OF CREATIVITY

This design very important because it have big area without columns also very economic 

INNOVATION

Design is new because it have steel + concrete  in same building 

Have very good light  so it ok as Open-EndedProject

IMPACT AND SIGNIFICANCE

 It beautiful 

 We can construction it in short time 

Also we can use material after Destroyed it in future 

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