Questions: Qual das curvas observadas no gráfico de tensão versus deformação abaixo resiste a tensões maiores antes de atingir o limite de escoamento? Explique qual o critério utilizado para embasar a sua escolha.

Qual das curvas observadas no gráfico de tensão versus deformação abaixo resiste a tensões maiores antes de atingir o limite de escoamento? Explique qual o critério utilizado para embasar a sua escolha.
Transcript text: Qual das curvas observadas no gráfico de tensão versus deformação abaixo resiste a tensões maiores antes de atingir o limite de escoamento? Explique qual o critério utilizado para embasar a sua escolha.
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Solution

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Solution Steps

Step 1: Identify the Curves

The graph shows three curves labeled 1, 2, and 3, representing the relationship between stress (σ) in MPa and strain (ε) in percentage.

Step 2: Determine the Yield Point

The yield point is the point on the stress-strain curve where the material begins to deform plastically. Before this point, the material will deform elastically and return to its original shape when the stress is removed.

Step 3: Compare the Yield Points

To determine which curve resists higher stresses before reaching the yield point, we need to compare the maximum stress values before the curves start to level off or drop.

  • Curve 1 reaches the highest stress value before leveling off.
  • Curve 2 reaches a lower stress value compared to Curve 1 before leveling off.
  • Curve 3 reaches the lowest stress value before leveling off.

Final Answer

Curve 1 resists higher stresses before reaching the yield point. The criterion used is the maximum stress value before the material begins to deform plastically.

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