This website uses cookies to ensure you have the best experience. Learn more

Creep Rate Of Rubber In Tension

1944 words - 8 pages

Background and Aim
Creep is defined as the ‘’ time-dependent and permanent deformation of materials when subjected to a constant load or stress’’ (Callister 2011, p.265). The aim of this experiment is to find the creep rate of a rubber in tension. Rubbers are classified as elastomers, elastomers are polymers which have a high degree of crosslinking and it is this crosslinking that allows elastomers to return to their original shape after deformation. Elastomers exhibit viscoelastic behaviour; viscoelastic materials have both viscous and elastic characteristics when undergoing deformation. When a load is applied to a viscoelastic material the deformation is time dependent under constant ...view middle of the document...

This was then repeated 3 times.
* A voltage reading was taken for the corresponding distance using a voltmeter accurate to ±0.001V. The measurements were recorded three times.
* LDVT
LDVT
A mass of 0.5kg was then placed on the experimental set up shown below and the voltage was recorded after 5 second time intervals for the first 30 seconds and then after every 30seconds until 275 seconds. The time was measured using a stopwatch from an iPhone with an accuracy of ±0.01 seconds. The procedure was repeated three times.
* The above procedure was then repeated with a mass of 1kg and the voltage was recorded using the same time intervals detailed above. The test was repeated twice.
Results and Analysis
In the experimental setup the strain of the rubber was measured using the LDVT, the readings given from this were voltage readings; however displacement readings are required in order to find out the strain. Therefore a calibration method must be deployed to transform the voltage into a displacement or length. To achieve this, voltage readings were taken as a gauge attached to the LDVT was compressed. The results are detailed in table 1.
Compression Displacement of the Gauge/ (mm) | Voltage/ (V) |
  | Test 1 | Test 2 | Test 3 | Average |
0 | 1.029 | 1.030 | 1.030 | 1.030 |
5 | 0.930 | 0.931 | 0.931 | 0.931 |
10 | 0.851 | 0.851 | 0.851 | 0.851 |
15 | 3.425 | 3.431 | 3.431 | 3.429 |
20 | 7.410 | 7.410 | 7.420 | 7.413 |
25 | 11.870 | 11.890 | 11.890 | 11.883 |
Table 1: table showing the voltage associated with certain lengths as the gauge was compressed
Once this information was obtained a graph of displacement against voltage was plotted in order to determine the relationship between the two. The graph is shown in figure 3 below.
Figure 3: relationship between voltage and displacement. The important part of the graph is the linear region as it shows a proportional relationship between voltage and displacement.

The graph in figure 3 shows a linear relationship after about a distance of 15mm therefore it is this area where the information can be used to calibrate the LDVT data. The linear region is then plotted below in figure 4.
Figure 4: Graph showing the linear relationship between voltage and displacement, the equation of the line and the coefficient of determination are also displayed on the graph. The line equation can be used to convert voltages to distance and the high value signifies the line is a good fit.

The line equation in figure 4 can be used to convert the voltage readings taken as a mass is loaded onto the experimental setup in figure 1 to length and hence strain values. Since there is a linear relationship between voltage and displacement/length and the equation is:
0.8454x-9.3334 ...

Other Papers Like Creep Rate Of Rubber In Tension

Newspaper Coverage of the Increase in the Unemployment Rate in the Bahamas

1714 words - 7 pages their cars amid traffic to buy copies” (Benjamin & LeGrand, 2012, p. 22). In The Bahamas there are two commonly read local daily newspapers, The Nassau Guardian and The Tribune (Benjamin & LeGrand, 2012). On October 23rd, 2013 the Department of Statistics released its 2013 Labour Force Survey, which was conducted in May 2013 and showed that the unemployment rate in the Bahamas had increased from 14% to 16.2% (Thompson, 2013). The following day

The Causes In The Rise Of The Divorce Rate In The US

572 words - 3 pages 'Till Death Do Us Part? Marriage is a God-given responsibility. Those who choose to pick it up without knowledge of its weight will tend to get hurt. Those who choose to lift it knowing, but without consideration will tend to hurt others. Individual right overrules public good when it comes to the family in this country, and it should not be so. The national divorce rate has significantly increased over the past several years. Currently

Examine The Reasons For And The Consequences Of The Fall In Death Rate Since 1900 (24)

966 words - 4 pages Examine the reasons for and the consequences of the fall in death rate since 1900 (24) Death rate is the number of deaths per thousand of the population per year. Since 1900 there has been a declining trend in overall death rate of the population in Britain, the death rate has almost halved from 19 to 10 per thousand. Although the death rate has increased slightly during the period of economic depression followed by World War 2, but the overall

A Reaserch Study on Accountancy Program Retention Policy and Survival Rate of Students in the Philippines

1455 words - 6 pages lessons already tackled. Effectiveness of Retention Policy in Northwestern University To sum up all, the researchers also ask the students on how they will rate the implementation of retention policy among accountancy students of Northwestern University as 10 as the highest and 1 as the lowest. Fourteen percent (14%) each were allotted to those who rated 7 and 8. Next is for 10 which is eighteen percent (18%). Then for 5 and 9 both are ten

The Increase Of The Cancer Rate In Our Country And Other Industrial Countries

2277 words - 10 pages For my topic, I decided to research the increase of the cancer rate in our country and other industrial countries. My concern for this is personal because I lost my mother to cancer when I was ten years old.My mother was a healthy woman who was active and physically fit. She did not smoke, and she had no family history of cancer. Yet when she was 36 she had emergency surgery for abdominal pain, and advanced colon cancer was discovered.My

How Shakespeare Creates Tension And Suspense Through The Use Of Language, Dramatic Irony, And Dramatic Devices In Act Three Scene One Of Romeo And Jul

2212 words - 9 pages How Shakespeare Creates Tension and Suspense through the Use of Language, Dramatic Irony, and Dramatic Devices in Act Three Scene One of Romeo and Juliet I will approach this task by looking at the different devices and language Shakespeare uses in Act 3 Scene 1, and explain how these techniques create tension. The Globe Theatre was where most of Shakespeare’s plays were performed. This was not however, the perfect

How Does the Director of Great Expectations Use Filmic Techniques to Create an Atmosphere of Tension in the Scene Where Pip's Benefactor Is Revealed?

2227 words - 9 pages How does the director of Great Expectations use filmic techniques to create an atmosphere of tension in the scene where Pip’s benefactor is revealed? This essay will be analysing the scene where Pip’s benefactor is revealed in David Lean's version of 'Great Expectations' focusing on how tension is brought to the screen. Great Expectations is a novel written by Charles Dickens in 1861 but set in 1812. The film version I will be analysing was

Describe the Trends' in Exchange Rate of Rupee Vis-a-Vis the Major Currencies over the Last One Year. How Has It Effected the Indian Economy?

1046 words - 5 pages The exchange rate fluctuations in India has been a topic of apprehension for the policy makers and common public. The exchange rate system in India, known as managed float, has evolved through a long process of probing for an suitable policy system for India. in view of the fact that exchange rates are relative prices of two currencies it is generally exaggerated by the relative productivity differential and real wage rates in the long-run

Structural Engineering

3837 words - 16 pages ://www.concrete.org.uk http://www.cementindustry.co.uk Effects of constituents Vast range of properties depend on type and quantities of constituents Strength Durability Workability Rate of hardening Heat of hydration Creep and shrinkage Frost resistance Density, cost, etc. Unit scope – concrete as material Concrete constituents Essential background for r.c. design Constituents Properties Cement + Water Chemical reaction Hydration

Ball Mill Liners Accessories

647 words - 3 pages weak, the impact is small, but the grinding effect is stronger. Requirements liner has good wear resistance. Domestic mainly used to fine grinding mill cylinder liner material is generally wear tin, chilled cast iron, ductile iron manganese and other rare earths. In recent years, rubber liner wider application. The general shape of the rubber liner made of rubber layering peace lining composed of two parts. According to the mill's operation

Project Scope Creep

5074 words - 21 pages [Type the company name] | Annotated Bibliography | Project Scope Creep | | [Type the author name] | [Pick the date] | Colquitt, J. and Lepine, J. (2013) “Stress.” Organizational Behavior: Improving Performance and Commitment in the Workplace, 130-142. The authors focus on the research field of organizational behavior and understanding attitudes and behaviors of individuals and groups within organizations with the goal of

Related Essays

Attrition Rate Of Engineering Students In Plm

589 words - 3 pages year, about 500 freshmen enroll in these engineering courses. However, due to the complexity of the curriculum and other factors, a significant decrease in the number of engineering students are perceived every school year. This results to a low graduation rate. This phenomena reflects the existing condition that the whole country is facing, a high enrollment rate but low graduation rate. With that being stated, this study aims to determine the

Rate Of Killings Rises 38 Percent In Chicago In 2012

843 words - 4 pages Walker 1 A. Walker Professor Olsen English 1301 June 22, 2012 Rate of Killings Rises 38 Percent in Chicago in 2012 A recent article written in the New York Times revealed alarming homicide statics. The murder rate has risen to an all time high of 38 percent this year in Chicago; which is the third largest city in the US. Other crimes such as rape, robbery, and burglary and auto theft are down by 10 percent

The Current Rate Of Crime In Our Society

1228 words - 5 pages The Current Rate of Crime in Our Society The current rate of crime in our society has reached alarming proportions. ne senseless killings of innocent lives, the harassment of law abiding citizens, and loss of property istotally not accepted at all levels and walks of our society. The impact of reported and unreported incidents of crime continue to negate our newly founddemocracy with disastrous effects to our economy. Taking intq

How Does Miller Create And Maintain Tension In Act Ii Of ‘The Crucible’

2710 words - 11 pages Miller exacerbates tension throughout Act II of ‘The Crucible,’ which was written to incriminate the corrupt trials taking place in the McCarthy Era in America during the 1950s. In the Salem witchcraft trials accusations were made without evidence and this led to the death of those with unfortunate fate in 1692 as a result of the mass hysteria in the Salem community and Miller’s play ‘The Crucible’ is an allegory of these trials. Salem