Elasticity

The overall objective of this lab was to verify Bernoulli-Euler beam theory for the lip-loaded cantilever and use that to calculate the Poisson ratio for the material in this case 6061-T6 aluminum. This was done by having to different objectives for each part of the Lab. Part one was use electrical resistance strain gage, this was to measure the strain a cantilever beam as it undergoes a known deflection. We would then compare the measurements with that of the strains predicted by simple beam…

To describe a human being, you would have to pick many qualities in order to truly paint a solid picture of a person. You can describe them and the subject might say “yes that sounds like me” but the reality is that we probably missed something. This is a really tough situation to be in and you could either insult someone because you missed something about them or they could think you do not really know them. Now imagine having to do it on yourself. You will read about how I am a mentor, how…

1) What are engineering stress and strain? Answer: Engineering Stress: Engineering stress is also called nominal stress, and it is defined as the applied load divided by the original cross sectional area of the material. Engineering Strain: Engineering strain is defined as the amount of material that deforms per unit length in a tensile test. Engineering strain is also known as nominal strain. 2) In the figure below, graphically show the toughness of three class materials:…

Study of Stress Corrosion Cracking (SCC) in Alloys Jiang Jingxing 1. Introduction of Stress Corrosion Cracking Stress Corrosion Cracking (SCC) is the growth of cracks with a under the combined effects of a static stress and a specific chemical environment. All SCC failures involve a macroscopic brittle performance, and the ductility of the material is reduced. It is universally acknowledged that there is no single mechanism for stress corrosion cracking (Ford, 1984). Stress…

Facilitators of Active / Successful Aging According to Rowe (1998), factors contributing to successful aging are the individual’s lifestyles choices, their innate personality in how they approach life, and a positive attitude build in resilience. Consider resiliency, by definition—quality of life does not always relate to physical illness. When comparing similar socio-demographic factors, those factors relating to positive outcomes for resiliency were the ability to recognize the people who…

The aim of the Stress Concentration Experiment was to observe the stress concentration factor/feature for a set of mild steel specimens with various irregularities in each sample. These irregularities or “stress-raisers” include any notches and holes which vary in size (radius) and placement on the specimen (edge notches or holes) that may have an effect on the flow of stress. With the use of a Hounsfield 50 kN electrically operated tensile testing machine and 12 1-mm thick mild steel test…

3.1. Growth Kinetic of strain: The growth curve of strain in both of mediums is shown in Fig. 1 (Supplementary data). It was apparent that 2 hours after nucleation of culture, strain interred to logarithmic phase and continues for 10 h in MRS broth and 12 h in PPM medium. Sonication continued in logarithmic phase in 2 h intervals. 3.2. The effect of ultrasound on growth kinetic: The growth curves plotted for the two condition (with and without sonication) (Fig. 1), growth kinetic parameters…

The concentration of CDCL and CSER is obtained by solving equation (1) and (2) CX = A1 / ax1 ………………..... (1) CY = [A2 – (ax2 × CX)] / ay2…...(2) Where,  A1 and A2are absorbance of mixture at λ1 and λ2respectively.  ax1 and ax2 are absorptivities of DCL at λ1 and λ2, respectively,  ay1 and ay2 are absorptivities of SER at λ1 and λ2, respectively,  CXandCYare concentrations of DCL and SER, respectively. Concentration of DCL and SER in the powder mixture is found by using equation (3) and (4)…

As said by the three-time Olympic champion, Gail Devers, “Sometimes we fall, sometimes we stumble, but we can’t stay down. We can’t allow life to beat us down. Everything happens for a reason, and it builds character in us, and it tells us what we are about and how strong we really are when we didn’t think we could be that strong.” In the non-fiction book Unbroken by Laura Hillenbrand, Louie Zamperini’s unrelenting strength in the face of unimaginable horrors emulates the words spoken by…

Novels can do many things to the reader, they can also make them feel countless different ways. Some books make one aware of a problem they did not know about before. Or they can make them aware of the severity of a problem that they did not know was very serious. Novels can also inspire and give readers hope about something they thought was hopeless. At the same time it can ignite a passion in the reader that they did not know existed. Novels like Zoo, this is a book that can do all of those…