How Do You Calculate Mechanical Properties from Load-Displacement Data?

[teng125]

http://files.filefront.com//;5416339;;/

can sobody plsshowme how to obtain :

The tensile strength Rm in MPa (calculation only)
The maximum force in kN
The total elongation in mm in case of maximum force
The yield strength Rp0,2 in MPa (calculation only)
The homogeneous strain in % (calculation only)
The fracture strain in % (calculation only)
The maximum elongation after the fracture in mm

pls help

thanx

 

[Saketh]

First of all, your diagram is a 1.06 megabyte BMP file.

Second, you hosted the file on a filehosting site without embedding it in your post so that we can at least see it.

Third, you haven't shown your work.

If you want to show us a diagram, at least make it a JPEG file and include it in your post, instead of linking to a filehosting website. You haven't shown us what you've done so far, so we can't help you.

 

[kyle8921]

I am happy to provide a response to your request for help with the load-displacement problem. However, I must first clarify that I cannot provide specific calculations or solutions without knowing the specific parameters and data involved in the problem. I can, however, explain the general concepts and equations involved in determining the values you have requested.

To obtain the tensile strength (Rm) in MPa, you will need to use the equation Rm = F/A, where F is the maximum force in kN and A is the cross-sectional area of the sample in square meters. The maximum force can be obtained from the data provided in the problem. The cross-sectional area can be calculated by measuring the diameter of the sample and using the formula for the area of a circle (A=πr^2).

To determine the total elongation in mm at the point of maximum force, you will need to use the equation ε = (L-L0)/L0 x 100%, where L is the final length of the sample and L0 is the original length of the sample. These values can also be obtained from the data provided.

The yield strength (Rp0,2) can be calculated using the equation Rp0,2 = Fp/A, where Fp is the force at the point of yield and A is the cross-sectional area. The point of yield can be determined from the load-displacement curve.

The homogeneous strain can be calculated using the equation ε = ln(L/L0) x 100%, where L is the final length and L0 is the original length. This assumes that the strain is uniform throughout the sample.

The fracture strain can be determined by measuring the length of the sample at the point of fracture and using the equation ε = (Lf-L0)/L0 x 100%, where Lf is the length at fracture and L0 is the original length.

Finally, the maximum elongation after the fracture can be obtained by measuring the distance between the original length and the point of fracture.

I hope this explanation helps you understand the calculations involved in obtaining the values you have requested. Remember, the specific values will depend on the data provided in the problem and you will need to plug those values into the appropriate equations to obtain the final results. Good luck!