product resource tutorial

Strain Measurement Tutorial

Strain and stress are the result when it comes to external forces that are applied to a non-moving object. Strain is defined as the amount of deformation that an object experiences compared to its original size and shape (the ratio of increase in length regarding original length) .

 

The term strain is in most cases used to describe the elongation of a section.

Strain can be caused by the effect of a force.

Strain is a dimensionless quantity and is usually expressed in percentage. Typical measures for strain are less than 2 mm/m for steel and are often expressed in micro-strain units. One micro strain is the strain producing a deformation of one part per million.

 

Stress

Stress is defined as applied force per unit area

It usually occurs as a result of an applied force but is often due to the effects of force within a material or within a larger system.

For example, let’s imagine a wire that is anchored at the top and hanging down. We apply weights to the end of this wire to pull it down, thus applying downward force. We can see that in the picture below, where A is the original cross-sectional area of the wire, and L is the original wire length. In this example, the material (wire) experiences stress that is called the axial stress.

 

The units are the same as pressure’s, because the pressure is the special variation of stress. Despite that, stress is still more complex quantity than pressure, because it fluctuates with direction and with the surface it acts on.

We can calculate the stress (σ) by multiplying strain (ε) and the Young’s modulus (E).

 

Force

Therefore

Given that the elastic modulus (the Young’s modulus) of steel is 210000 N/mm2 and the cross section of the sensor is 139 mm2 we get:

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Ryan was raised in Mesa, Arizona, attended Gilbert schools and graduated from ASU in 2006 with a Bachelors in Interdisciplinary Studies. He went on to complete his MBA at the University of Phoenix Campus in Mesa. Prior to VMA, Ryan worked 5 years as a consumer sales consultant and then 5 years as Program Analyst at Orbital Sciences, now Northrop Grumman.   Outside of the office, Ryan loves to spend time with his wife, 12yr old daughter and twin 7 year old boys. Ryan loves to get outdoors to hunt & fish as often as possible, serves frequently with kids and adults at church and enjoys quality BBQ time with his friends and family. Ryan is located in our Arizona office.

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Natalie Myers joined Vic Myers Associates in September 2021 and is excited to be part of the team. She received her bachelor’s in business administration from the University of Phoenix and prior to her position as Inside Sales Administration she worked in the Hospitality Industry for over 15 years as a Senior Sales Administrator. In her free time, she enjoys spending time with her husband, daughter, family and friends along with watching sporting events, traveling, hiking and cheering on her daughter in dance and basketball! Natalie is located in our Arizona office.

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