Skip to main content

Laminated neoprene pad Experiment

Welcome to our website News on Crunch, as we know there are various applications of Laminated Neoprene pad under construction of bridges due to their elastomeric tendency. So, let's perform an experiment and get to know more about this:

Objective(s) for Laminated Neoprene Pad

  • To determine the equivalent modulus of elasticity of a laminated neoprene pad under axial compression load by plotting a stress-strain curve based on the recorded data.

Materials and Resources

  1. Measured dimensions of laminated neoprene pad, L × B × t = 250 × 200 × 44 mm 
  2. Rubber layer: 8 mm thick 3 Nos.
  3. Steel plates: 3 mm thick 4 Nos.
  4. Top and bottom rubber cover: 4 mm thick 2 Nos.
  5. Side cover rubber: 6 mm thick (all four sides)
  6. Steel plate area: 238 × 188 mm = 44744 mm2
  7. Shore-A hardness of the specimen: 70 (approximately )
  8. Modulus of elasticity of steel = 205 GPa

Code(s)

Code 1 : Description(write it in Octave or Matlab)

clc 

clear

data = csvread('your csv file name(eg: neoprene_compression.csv)');

u1 = 35.5178 - data(:,2);

u2 = 33.2294 - data(:,3);

u3 = 28.6471 - data(:,4);

u4 = 29.9547 - data(:,5);

load = data(:,1);

stress = load / 4.4744;

u = (u1 + u2 + u3 + u4)/4;

strain = u / 88;

hf = figure ();

scatter(strain,stress);

xlabel('strain')

ylabel('stress')

saveas (hf, "figure1.png");

Results (stress vs strain for Laminated Neoprene Pad)

stress vs strain plot for a Laminated Neoprene pad
Figure : Stress (MPa) vs Strain(mm/mm) for a Laminated Neoprene Pad

Answers

Calculate stress vs strain data, Apparent E and Equivalent E.

  • The values of Stress and Strain for the laminated Neoprene pad are given in the graph on y-axis and x-axis respectively. 
  • Apparent E = (20 - 10) / (0.079499 - 0.058397) = 473.889 MPa 
  • Equivalent E = 44 / ((12 / 205) + (32 / 473.889) MPa = 651.033 MPa

My Own Observations and Comments

  1. The laminated elastomeric bearing pad has fine elasticity which can adapt the rotation of beam end and also it has great shearing deformation capacity which can satisfy the horizontal displacement of the superstructure. It has sufficient vertical rigidity which can reliably transfer the concentrated down-loads and impact loads of the superstructure to both ends of the pier.
  2. Some applications in our life are like, Bridges with small displacements and short spans, Load bearings of building structures, Flyovers, etc. In addition to being used in bridges, it also can be used for hydraulic engineering and earthquake resistant facilities.
  3. The laminated rubber bearing pads can reduce the pier vibration and accommodate the horizontal movement on the bridge span structure caused by the temperature changing and thermal expansion

Comments

  1. Note: If you want a better quality of Graph then, comment below for same.

    ReplyDelete

Post a Comment

Feel free to contact us.

Popular posts from this blog

Kunduz Tutor Registration, app, earnings - All you need to know

Kunduz is becoming a leading platform for asking doubts for JEE Mains and NEET exams and get cleared your doubts in a very less time.   About Kunduz Tutor app Probably, you may have listened about different apps/websites where you can work as a tutor and also make part-time income by clearing doubts.   Kunduz is totally safe to use . Some of such famous websites are like Toppr, Chegg, Kunduz , etc.  Toppr is also another website on which one can work as a tutor. This is our second tutorial to earn money by solving JEE / NEET questions . Today we will discuss briefly about Kunduz app and some below points: How can you work as a Tutor on Kunduz? Who can apply for Kunduz Tutor? How are payments given to tutors?  What is the registration process of Kunduz tutor? Payment proof. Is it worth? How can you work as a Tutor on Kunduz? On Kunduz it is something like 1-on-1 tutoring. First of all, during registration process you can select any one subject from Mathemati...

Apps to solve JEE questions and earn 100$/month

H ello friends, welcome to our website News on Crunch - Informative News . Generally, after JEE when we go to college we want to have some amount of money for our personal expenses and often we want to earn it on our own.  So, we will talk about some of the great apps to solve JEE questions and earn $100/month depending on your work and the time you devote to those apps. I have tried many apps but the two apps which I found most helpful were Toppr and Kunduz tutor app. So, Let’s get started to know about the whole registration, earning and withdrawing process in these apps. Toppr App So in this app you have to solve the doubt of jee aspirants. Depending on the number of doubts you can earn money.  To start with this app first of all you have to get the missing certificates and suppose, if you're trying for Mathematics then you have to get free certificates general aptitude, logical reasoning and Mathematics. Those questions are generally of intermediate level.  You c...

Is Kunduz app safe? Kunduz tutors salary and earnings

Kunduz is one of the best platforms to get your doubts solved of JEE and NEET exams. They have two platforms one for students and other one for tutors. Tutors have chance to solve questions posted by students and earn money. Kunduz tutor app is a platform where you can solve questions and earn money . And a different app name ' Doubt Solving app, Maths, JEE Mains, NEET - Kunduz ' is also available where students can post questions. For posting questions, students need to have subscription. Is Kunduz app safe? Kunduz app is 100% safe both for students and tutors. It is established brand in digital education which provides personalized solution of students' doubt in 30 minutes. For students: If you are JEE or NEET aspirants, then you can take their plans so as to ask up to unlimited questions. There are also other platforms like Doubtnut , Gradeup, Toppr, etc. So, ask your friends and choose the one which best suits you. They also have huge questi...