Introduction of Compressive and Tensile Stresses in Structural Members

Compressive and tensile stresses are two of the most common and important types of stresses that occur in structural members. Compressive stresses tend to decrease the size of a material, while tensile stresses tend to increase the size of a material. If a material is evenly stressed in both directions, it will remain the same size.

What Is Stress and Their Types

• There are many different types of stress, but the one commonality between all stressors is that they can have a negative impact on our health
• The body responds to stress in the same way whether it’s caused by an external factor like a job loss or an internal factor like anxiety
• When we perceive a threat, our body releases a hormone called cortisol
• Cortisol is a “fight-or-flight” hormone that helps us deal with the perceived threat
• This fight-or-flight response is an evolutionary mechanisms that helped our ancestors survive in times of danger.

  However, in today’s society, we are constantly bombarded with stressors, both big and small

• This constant state of stress can lead to health problems, such as high blood pressure, heart disease, and obesity
• It can also exacerbate existing mental health conditions, such as anxiety and depression.

  There are four different types of stress:

  1

• Acute stress

  Acute stress is the most common type of stress

• It’s the kind of stress that we feel in response to a specific event or situation
• For example, if you have a presentation at work, you may feel acute stress leading up to and during the presentation
• Once the event is over, the stress dissipates.

  2

• Episodic stress

  Episodic stress is similar to acute stress, but it’s characterized by repeated episodes of stress

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Why Compressive Stress Is Considered as Negative

• Compressive stress is considered negative because it can cause a material to become weaker and more brittle
• Additionally, compressive stress can lead to deformation of a material.

Conclusion

Compressive and tensile stresses are introduced in structural members by the application of external forces. These external forces may be due to the weight of the member itself, or to external loads acting on the member. Compressive stresses tend to shorten a member, while tensile stresses tend to lengthen it. If the magnitude of the compressive stresses exceeds that of the tensile stresses, the member will fail in compression. On the other hand, if the magnitude of the tensile stresses exceeds that of the compressive stresses, the member will fail in tension.

Frequently Asked Questions

What is the difference between compressive and tensile stresses?

Compressive stresses tend to decrease the size of a material, while tensile stresses tend to increase the size of a material.

What is the difference between compressive and tensile stresses?

Compressive stresses tend to decrease the size of a material while tensile stresses tend to increase the size of a material.

What is the difference between compressive and tensile stresses?

Compressive stresses tend to decrease the size of a material, while tensile stresses tend to increase the size of a material.