Stress and Strain fracture and flow

In summary, when the maximum shear stress and maximum tensile fracture stress are equal, the material will deform by both fracturing and flowing.
  • #1
Master J
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Stress and Strain...fracture and flow

If a material has a maximum tensile fracture stress of S, and a maximum shear stress of T which causes plastic flow, how will it deform:

If T=S

and if 3T=S ??


Its not an important question, but I am just curious? I can't get my head around it. Can the material both fracture and flow in the first case? And will it flow in the 2nd, since applying S, you have already passed T?

Im not certain if there are mathematics to work this out, or if conceptual answers would be fine.

Cheers guys!
 
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  • #2
In the first case, the material will deform by both fracturing and flowing. When T equals S, the material will be at its maximum tensile strength, so any further stress applied to it will cause it to fracture and flow. In the second case, when 3T equals S, the material will be under a significantly higher amount of stress than it can sustain, so it will be sure to fracture and flow.
 

FAQ: Stress and Strain fracture and flow

What is stress and strain?

Stress and strain are terms used to describe the physical response of a material to an applied force. Stress refers to the force applied to a material, while strain refers to the resulting deformation or change in shape.

What is a fracture?

A fracture is a type of failure in a material that occurs when the applied stress exceeds the material's strength. This results in a crack or break in the material, which can be caused by various factors such as excessive force, fatigue, or material defects.

How does stress and strain affect the flow of materials?

The stress and strain of a material can greatly influence its flow behavior. When a material is subjected to stress, it can either flow or deform depending on its properties. Materials with a higher strength and stiffness are less likely to flow, while those with lower strength and stiffness are more likely to flow under stress.

What factors can cause stress and strain in materials?

Stress and strain can be caused by various factors such as applied forces, temperature changes, and material defects. Other factors that can contribute to stress and strain include the material's properties, loading rate, and environmental conditions.

How can stress and strain be measured?

Stress and strain can be measured using specialized equipment such as strain gauges and load cells. These devices can accurately measure the amount of stress and strain in a material and provide valuable data for analysis and testing. Additionally, mathematical equations and models can also be used to calculate stress and strain in materials.

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