transportable classroom table and chair 1- ahmed alshamrani 2- mansour alrumayh 3- abdulrahman...
TRANSCRIPT
Transportable Classroom Table and Chair
1 -Ahmed alshamrani
2 -Mansour alrumayh
3 -Abdulrahman alqadi
4-Ali alqadi
5-Mohannad alnufaie
6-Ahmed alobidy
Supervised byDr.Mohammad Abshar.
Group 2
2Introduction
Every day we live in , we use many things that we actually we cant take it off our lives , In order to make life easier and healthful, we came out of an idea which is making chairs able to be transported from place to another in an easy and simple way regarding to its
use in our lives .
3Problem Statement
Current chairs are heavy and not transportable. Also, sometimes they don’t have a table.So,we will try to solve these problems by designing a light and transportable chair with attached table.
4Need Analysis
-Table and chair-Transportable
-Light-Made off high quality materials
-Comfortable-The table can be extended
-Storage
5Main Objective
-To design a transportable chair and table that can be combined together.
6Secondary Objectives
-To be built by a high quality materials-The ability to store things
-To be comfortable-Table extender
7Objectives tree
design a transportable chair and table
high quality materials
Ability to store things
Table extender
Comfortable
8Constraints
-Maximum cost 500 SR-Maximum mass of 5 kg ( 49.05 N)
-Maximum load of 120 kg (1177.2 N)
9Criteria
-Safe-Easy to use-Comfortable
-transportable -light.
10Problem definition
Design a separate and transportable classroom chair and table that can be combined together . Their mass limit should be 5 kg and the load shouldn’t exceed 120 kg (1177.2 N) .They should be made of high quality material .The chair must be comfortable and safe.The table is able to extend. The chair must have storage, also
wheels to make it transportable .
11Existed designs
Pros:-Light - Transportable
Cons:-Can’t handle heavy weight
-Doesn’t have a table.-Can’t adjust height.
-Uncomfortable. [1]
12Existed designs
Pros:-Comfortable. -Has a table.
-Can hold heavy weight.
Cons:-Too heavy . -Not transportable.
-Doesn’t have a storage. [2]
13Morphological Analysis
Features Possible Concept
Type of material Aluminum , Steel , Magnesium
Ground Supports Wheels , Fixed.
Adjusting height Hydraulic , Pin , None
14Designs Concepts.
Design (1) : Steel , Fixed , Hydraulic.
Design (2): Aluminum , Wheels , Pin
Design (3): Magnesium , Wheels , None
15Criteria and weights
Criteria Weight
Easy to use 10
Light 25
Transportability 30
Safety 20
Comfortable 15
Total 100
16Weight and Rate
Criteria
Score
Comfortable
Transportability
Light Easy to use
Safety
15 30 25 10 20 Weight
Concepts (designs)
10 5 5 8 5 Rate Design (1)
695 150 150 125 80 100 Total
8 8 8 5 8 Rate Design (2)
770 120 240 200 50 160 Total
7 10 10 10 10 Rate Design (3)
955 105 300 250 100 200 totalHence , the best design is design (3).
10 for the best …1 for the worst.
17Materials Properties
NAME
Density(g/
cm³)
Tensile strength
(MPa)
Yield strength
(MPa)
Elongation
(%)
Specific strengt
h
Young’s modulus
(GPa)
Magnesium alloy
AZ91 1.82 280 160 8 154 45
AZ31B 1.77 260 200 15 147 44.8
Aluminum alloy 380 2.70 315 160 3 117 71
Steelcarbo
n steel
7.86 517 400 22 66 200[3]
18Cost Analysis
Chair mass = = 1.5 Kg
Desk mass = = 3.03 Kg
Desk cost = 3.03 = 131 SR
Total mass = 4.53 Kg
Total cost = 180.5 SR
Sheet alloy costs (11.00 Dollar/Kg) and Extrude alloy costs (8.8 Dollar/Kg)[4]
Human Factors
20Anthropometric Factors
All dimensions in inches
[5]
21Ergonomic Factors
-The table should have easily input and output method.
-The way of opening and closing the chair should be hard and tough.
-The easiness of moving it along places.
22Physiological Factors
[6]
23Psychological Factors
It should have many different colors to make it comfortable for the eyes.
24Simulation
25Conclusion
The design will be made of magnesium which makes it light and safe as well . Also, it will be supported by wheels that increase its transportability . However, the table would be attached to the chair by clicking it on the chair. In addition, it will have fixed height that makes it easy to use. Its height,
length and width will be 36,15 and 15 inches respectively .
26References
[1]:http://www.exhib-it.com/trade-show-furniture
[2:]://http . . / / - - .www wengercorp com chairs portable audience chairs php
[3 :]://http . . . / / _ / _ _ / _ _ .www jsw co jp en mg f mg mg f mg mg chare htm
[4 :]W. D.Callister, Jr, “Materials Science and Engineering an Introduction", seventh edition, John wiley,2007,pp: A33.
[5 : ]://http. . / / /2010-07-15-08-16-206.www chaircoverchair com pic other jpg
[6 :]:// . . / / - .http www smartfurniture com products Leap Chair html
27
Thank you for listening .