StudentShare solutions
Triangle menu

Strength of Material - Essay Example

Not dowloaded yet

Extract of sample
Strength of Material

Stress can be defined as the force acting on a given area. This is mathematically represented as
Robert hook investigated the behavior of material under tensile force and found out that the extension on materials was proportional to the applied load. This is called the hooks law. Hooks law apply up to the elastic limit. Continued application of load beyond the elastic limit results to the material becoming plastic, That is, its elongation is not proportional to the applied load and does not regain its original shape once the force is removed.
The concept of stress was introduced by Cauchy in 1822; Cauchy found out that a body was subjected to surface and internal forces. These caused the deformation on the body. When stress is uniformly distributed over the cross-sectional area of a body, it can be calculated using the formula (1), however, the stress is not uniformly distributed. Cauchy calculated the state of stress at a given point and found it to be given by the second order tensor given below.
Another version of the Mohr stress circle is using the polar approach method. The Mohr stress circle can also be used for the determination of stress in the three dimensional plane. A special Mohr circle is drawn to calculate the nominal and shear stress in the three dimensional plane. ...
Are the normal stresses. Where:

Are the shear stresses

Stress can also be calculated using the Mohr stress circle; this is the graphical representation of the stress. The diagrammatic representation of the Mohr stress circle is as shown below































Fig 1 showing the Mohr stress circle
Another version of the Mohr stress circle is using the polar approach method. The Mohr stress circle can also be used for the determination of stress in the three dimensional plane. A special Mohr circle is drawn to calculate the nominal and shear stress in the three dimensional plane. Other methods used in the determination of stress include the Biot stress tensor and the Kirchhoff stress tensor (Dieter, 1989).

In general the determination of stress using the graphical methods was laborious and complex, one required a lot of skills to draw these circles and determine the normal and shear stress. The method had many mathematical errors. These methods have largely been replaced by computerized material strength analysis (Marsden & Hughes1994).

Current methods for the evaluation of stress include the use of software's. Software's such as AutoCAD and solid works enable engineers to have a detailed analysis of the behavior of the designed product under loading. This helps in developing products that don't fail easily. Another program that is widely used is the Finite element analysis program. It enables the graphical representation of a designed engineering component under load.

















References
Dieter, G. (1989). Mechanical Metallurgy. New York: McGraw-Hill.
Ferdinand, P. (1992). Mechanics of Materials. New York: McGraw-Hill Professional
Marsden, J. & Hughes, T. (1994). Mathematical Foundations of Elasticity. New York: Dover ...Show more

Summary

The ability of materials to resist the externally imposed forces is referred to as the strength of that material. Different engineering materials have differing strength and are thus used in different areas. The study and evaluation of strength of materials is very important as it helps engineers use the most suitable material…
Author : garland06
Strength of Material essay example
Read Text Preview
Save Your Time for More Important Things
Let us write or edit the essay on your topic
"Strength of Material"
with a personal 20% discount.
Grab the best paper

Related Essays

Material Selection & Design
The parameters used to judge the utility of the different materials used are, but not restricted to, the following: 1. The material should contain the carbon dioxide within the container. 2. It should be tough enough to resist impact shattering and strong enough to resist denting.
4 pages (1000 words) Essay
Strength of material
Engineering components are usually subjected to various forces, at the most basic level tensional and compressional forces acting in straight lines. One factor that greatly impacts the nature of loading of a component or structure is the shape of the structure.
2 pages (500 words) Essay
Civil Engineering material
To make every structure stable supervision of civil engineers are required. Houses, shopping malls, roads even housing schemes are designed and built by civil engineers. Engineering as we know is the branch of science in which application of scientific principles are made efficiently by people called engineers.
5 pages (1250 words) Essay
Construction technology
2 pages (500 words) Essay
Strength of Materials
This assists in getting the minimum strain energy of the loaded structure. Strain energy's derivatives considering the nodal co-ordinates are considered as the material forces acting on the nodes of the undeformed structure in design of large and complex structures.
3 pages (750 words) Essay
Advance Aircraft material:
Aircraft designing and all new generation aircrafts are the outcome quintessential efforts in the field of designing as well as in the material necessary for the manufacturing of the aircrafts. In earlier phases of aircraft engineering, the development of better models was greatly affected by the lack of corresponding development in the materials needed for the construction of these models.
5 pages (1250 words) Essay
Strength of material 2
A key rule that structural engineers must adhere to is that the resistance of every structural element as well as the structure as a whole such be greater than the maximum load that the structure will be exposed to over its lifetime, along with a built in safety
2 pages (500 words) Essay
Material Selection & Design
The parameters used to judge the utility of the different materials used are, but not restricted to, the following: There are other
4 pages (1000 words) Essay
Material Durability
A discussion on these mechanisms follows below, alongside the protection measures that required at construction and during maintenance. Corrosion is an electrochemical
6 pages (1500 words) Essay
Engineering material
is conducted by placing a cylindrical cross-sectional specimen with reduced gauge in a testing device and applying gradually increasing the uniaxial tensile load to the material until fractures are observed in the reduced gauge section. Both ends of the specimen should have
6 pages (1500 words) Essay
Get a custom paper written
by a pro under your requirements!
Win a special DISCOUNT!
Put in your e-mail and click the button with your lucky finger
Your email
YOUR PRIZE:
Apply my DISCOUNT
Comments (0)
Rate this paper:
Thank you! Your comment has been sent and will be posted after moderation