Prakash Rajendran

17 Questions 37 Answers 0 Followers

Questions related from Prakash Rajendran

How does one give bidirectional woven ply orientation in ABAQUS?

For example , a ply has 0 and 90 orientations, so how to give these orientations in ABAQUS software.

07 August 2014 7,717 3 View

Can I use Lipschtiz (Hoelder) exponent and intensity factor in the DWT?

I wish to use the intensity factor to quantify the damage in the DWT analysis. But I have seen in the literature that others were used in CWT analysis. So my doubt is whether I can use intensity...

30 April 2014 6,912 0 View

How can I check the closeness of normal distribution?

I have data points that I want to check the closeness of normal distribution. So I can use ''hist'' function in MATLAB, but I need a coefficient which tells how closeness to the normal...

16 April 2014 1,707 11 View

How to convert .hpf file into .xlsx file?

I have data which is in .hpf format that I am trying to convert .xlsx file. Can any one help me out?

29 March 2014 1,980 1 View

Can I use six sigma method as threshold value for damage identification problems?

Is there any standard practices are available to use threshold value in the damage identification problems. If anything is there, kindly let me know.

22 March 2014 6,772 5 View

Could any one tell me about an ASTM standard for a uni-axial tension and compression test for composite materials?

I would like to do the uni-axial test for composite specimen .Kindly let me know the appropriate ASTM standard so that I can proceed further.

30 January 2014 5,935 7 View

What is the advantage of vibration based method over fiber bragg grating (FBG) method used for damage identification purpose?

I wish to know about the difference between these two methods. can any one explain me briefly.

07 January 2014 5,454 2 View

What is the physical significance of eigen values of stiffness matrix?

I would like to know about the importance of eigen values of stiffness matrix. Can anyone explain them to me clearly?

25 September 2013 1,445 9 View

How do I model the crack on composite beam with ABAQUS Software?

I wish to model the crack on composite beam using ABAQUS software. Can anyone tell me the procedure?

18 August 2013 10,065 2 View

Should I use external triggering option when I log sensor data in order to capture the signals from zeroth sample?

The signals acquired from both accelerometer and impact hammer through DT9837 DAQ Card using MATLAB. Will it affect the frequency of the structure if data starts to capture after nth sample?

16 August 2013 2,667 2 View

Can anyone suggest good material about Rational Fraction Polynomial (RFP) modal parameter extraction method?

Modal parameters that need to be extracted from experimental modal analysis. So I want to use RFP method because it deals with multi FRF signal which suited for SIMO and MIMO method. If any of...

30 July 2013 6,233 2 View

Does average of FRF 'n' no of measurement data at nodal point of each mode used to reduce the noise effect ?

In modal analysis , most of the researchers are following the average of 'n' FRF measurements to reduce the noise. Is this correct?

29 July 2013 8,680 1 View

How to overcome the boundary condition problem in the experimental modal analysis?

I am doing experimental modal analysis on cantilever beam model . Natural frequency changes due to boundary conditions changes at every instant which affects the characteristic of structure.This...

26 July 2013 1,571 5 View

What is a change in mode shape? If I consider the change in mass in the eigen value problem with MDOF dynamic system?

I would like to know the change in mode shapes , If I consider the change in mass in the eigen value problem with MDOF dynamic system. Can anyone explain them briefly? Hereby I've explained my...

25 July 2013 7,760 0 View

Is it correct to use the assumption of Euler -Bernouli beam theory for the thin composite beam?

GFRP composite beam made up of bidirectional woven mat stacked layer by layer till obtained 3mm thickness. The length and width of beam is 450mm and 26mm respectively. I ignored shear effects...

25 July 2013 2,242 13 View

Is it correct to average data of FRF from the experiment?

When we take several trials and take their average, is it better to remove noise effect in the FRF measurements or put all the data together and use control limit to remove the outliers?

16 July 2013 260 1 View

Can someone advise on whether it is correct to use the cubic spline interpolation in order to get more data points in the measured mode shapes?

I have measured the mode shapes using rowing hammer method, but I have only 15 data points for 450 mm length of the beam. It is insufficient to find higher order mode shapes. My question is '' is...

30 June 2013 1,646 2 View