What is Fracture Mechanics Desci engineering design A plate

What is Fracture Mechanics? Desci engineering design. A plate of width 2w = 10 in, and thickness t = 0.1 in, is made of 7075-T651 aluminum (= 78 ksi, = 70 ksi). It has a plane stress = 60 ksi. It is used in an aircraft component which will be inspected periodically for cracks. Estimate the highest load, P, that can be applied without causing sudden fracture when a central crack grows to a length, 2c, of 1.5 in.

Solution

Fracture mechaics is the field of mechanics concerned with the study of the propagation of cracks in materials. It uses methods of analytical solid mechanics to calculate the driving force on a crack and those of experimental solid mechanics to characterize the material\'s resistance to fracture.

Engineering is the application of science to problem solving. Design is the creative expression of knowledge.

The engineering design process is a methodical series of steps that engineers use in creating functional products and processes.

2) Finite Element Analysis (FEA) is a computer based method of simulating/analysing the behaviour of engineering structures and components under a variety of conditions. It is an advanced engineering tool that is used in design and to augment/replace experimental testing. The basic steps involved in this are

1. Discretization

2. Element analysis

3. System analysis

4. Boundry conditions

5. Finding global displacements and

6. Calculation of stresses.