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Wednesday, 8 July 2015

11 Project Assistants & Fellow Recruitment in CBRI Roorkee

11 Project Assistants & Fellow Recruitment in CBRI Roorkee

Published Date:   07 Jul 2015
Post:   Project Assistant, Project Fellow
Education Qualification:   BE, B Tech, MSc, M Tech
Recruitment By:   CBIR
Last Date:   16 Jul 2015

The CSIR – Central Building Research Institute (CBRI), Roorkee has released notification for recruitment of Project Assistant & Project Fellow. CSIR-CBRI invites applications from dynamic young candidates as temporary manpower to work in various sponsored/CSIR Network Projects (Under 12th Five Year Plan). The recruitment is purely on contract basis temporary position.
CBIR has been vested with the responsibility of generating, cultivating and promoting building science and technology in the service of the country. At the national level of India, the Institute has close interaction with BMTPC, HUDCO, DST, Ministry of Urban Development, Ministry of Rural Areas, Housing Boards and Societies of the State Governments, engineering and academic institutions, construction and building material industries.

Project Assistant & Fellow Recruitment in CBRI, Roorkee

Name of the postNumber of PostsQualificationDate & Time of Interview
Project Assistant (Level–I)1Diploma in Mechanical Engg with 60% marks16.07.2015; 8.00 A.M
Project Assistant (Level–I)1Diploma in Electronics/ Instrumentation Engg with 60% marks16.07.2015; 8.00 A.M
Project Fellow3BE/ BTech (Civil Engg) with 55% and eligible to appear for UGC NET16.07.2015; 8.00 A.M
Project Fellow1BE/ BTech (Electronics & Communication Engg) with 55% and eligible to appear for UGC NET17.07.2015; 8.00 A.M
Project Fellow1BE/ BTech (Electronics & Instrumentation Engg) with 55% and eligible to appear for UGC NET17.07.2015; 8.00 A.M
Project Fellow1MSc/ MTech (Geophysics) with 55% and eligible to appear for UGC NET17.07.2015; 8.00 A.M
Project Fellow1B.Arch with 55% and eligible to appear for UGC NET17.07.2015; 8.00 A.M
Project Fellow1BE/ BTech (Instrumentation/ Electrical Engg) with 55% and eligible to appear for UGC NET17.07.2015; 8.00 A.M
Project Fellow1BE/ BTech (Civil Engg) with 55% and eligible to appear for UGC NET
16.07.2015; 8.00 A.M

Age Limit & Monthly Stipend

For Project Assistant - 25 Years & Rs 8000/-
For Project Fellow – 28 Years & Rs 16000/-

How to Apply

Interested candidates may appear for Walk-in interview before the Selection Committee at CBRI, Roorkee on the date and time as mentioned above along with original documents and six copies of bio-data (One copy of bio-data duly affixed with a latest passport size photograph and supported by self-attested photocopies of certificates, mark sheets and other relevant documents) giving following information on one side of A-4 size paper.
Place of Interview : CSIR -CBRI, Roorkee
Important Dates
Walk-In Interview Dates : 16 July & 17 July 2015
Important Links
Download Original Advertisement and application form : Click Here

Wednesday, 1 July 2015

Modulus of Elasticity vs Modulus of Rigidity |Elastic Modulus vs Shear Modulus

Modulus of Elasticity vs Modulus of Rigidity |Elastic Modulus vs Shear Modulus 

Modulus of elasticity and modulus of rigidity are two properties of matter. These properties are very important in designing and implementing mechanical and structural designs. These concepts are very important in understanding the proper mechanics and statics of solid systems. To have a clear understanding in fields such as engineering and physics, a clear understanding in these concepts is required. In this article, we are going to discuss what modulus of elasticity and modulus of rigidity are, their applications, definitions of modulus of elasticity and modulus of rigidity, their differences and finally the difference between these two.
Modulus of Rigidity (Shear Modulus)
Shear stress is a deformation force. When a force is applied tangential to a solid surface, the solid tends to “twist”. For this to happen, the solid must be fixed, so that it cannot move in the direction of the force. The unit of shear stress is Newton per meter squared or commonly known as Pascal. We know that Pascal is also the unit of pressure. However, the definition of pressure is the force normal to the surface divided by the area, whereas the definition of shear stress is the force parallel to the surface per unit area. Torque acting upon a fixed object can also produce shear stress. By definition, not only solids but also fluids can have a shear stress. Objects have a property called the shear modulus, which tells us how far will the object twist for a given shear stress. This depends on the shape, size, material and temperature of the object. Shear stress of constructions and automobile engineering plays a main role in designing and implementing the design.
Modulus of Elasticity
Elasticity is a very useful property of matter. It is the ability of the materials to return to their original shape after any external forces are removed. It is observed that the force required to keep an elastic rod stretched is proportional to the stretched length of the rod. Modulus of elasticity is the tendency of an object to deform elastically when an external force is applied. The definition of the elastic modulus is the ratio of stress to the strain. The stress is the restoring force caused by the deformation of the molecules. Stress is given as a pressure. Strain is the ratio of the deformed length to the original length of the object. Strain is a dimensionless quantity. Therefore, modulus of elasticity also has the dimensions of stress, which is Newton per square meter or Pascal.

What is actually poisson's ratio.. Read it u will learn something most important

Poisson's ratio is defined as the negative of the ratio of the lateral strain to the axial strain for a uniaxial stress state. If a tensile load is applied to a material, the material will elongate on the axis of the load ﴾perpendicular to the tensile stress plane﴿,

Tensile deformation is considered positive and compressive deformation is considered negative. The definition of Poisson's ratio contains a minus sign so that normal materials have a positive ratio. Poisson's ratio, also called Poisson ratio or the Poisson coefficient, or coefficient de Poisson, is usually represented as a lower case Greek nu, n

Note: Poisson's Ratio has no units

Poisson's ratio is sometimes also reffered to as the ratio of the absolute values of lateral and axial strain. This ratio, like strain, is unit less since both strains are unit less.

For stresses within the elastic range, this ratio is approximately constant. For a perfectly isotropic elastic material, Poisson's Ratio is 0.25, but for most materials the value lies in the range of 0.28 to 0.33.

Generally for steels, Poisson's ratio will have a value of approximately 0.3. This means that if there is one inch per inch of deformation in the direction that stress is applied, there will be 0.3 inches per inch of deformation perpendicular to the direction that force is applied.

In other words poission ratio indicates the fraction by which a material is deformed by the action ocompressive  or tensile(elongating) force in one of its perpendicular direction...

the best example to understand its physical effect is when u stretch a rubber band,it increases its length and at the same time,its diameter decreases , amount of decrement is given by poisson's ratio wrt its elongation

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