What Is Von Mises Stress? - SDC Verifier

Trang chủ » Von Mises Stress Calculation Formula » What Is Von Mises Stress? - SDC Verifier

Có thể bạn quan tâm

Articles Von Mises Stress: What It Is, Formula, and How to Interpret It in FEA / 05 May 2022 / by: User Avatar Yurii Shumak Finite Element Analysis (FEA) SDC Verifier

Last updated: 24 Feb 2026

Von Mises stress (also called equivalent stress, σv is a single scalar value computed from the full 3D stress state. Engineers use it to check whether a ductile material (most metals) is likely to start yielding under complex loading.

The practical idea is simple: a tensile test gives you one number to compare against (yield strength σy\sigma_y). Real parts see a mix of normal and shear stresses. Von Mises converts that mix into one comparable value.

Stress–strain curve from a tensile test with a cylindrical specimen, illustrating yield strength used for von Mises yield checks.

Yield strength ( \sigma_y ) comes from a uniaxial tensile test. Von Mises stress converts a multiaxial stress state into a single value you compare to ( \sigma_y ).

Yield check (elastic interpretation):

  • Ifσv<σy\sigma_v < \sigma_y, the material is expected to remain elastic.
  • If σv≈σy\sigma_v \approx \sigma_y, yielding is expected to begin.

In FEA, von Mises is popular because it’s easy to plot, easy to compare, and usually the right first pass for ductile metals.

Table of Contents

Từ khóa » Von Mises Stress Calculation Formula