剪应变计算器

Shear Strain Calculator

Compute shear strain γ = τ/G from shear stress and shear modulus for shear deformation and torsion analysis.

📐 计算公式
剪切应变(线弹性):γ = τ ÷ G(τ 剪应力 Pa、G 剪切模量 Pa);联动量:微应变口径 = γ×10⁶(μrad)、剪切角 = atan(γ)(rad,×180÷π 转度);例 τ=50MPa、G=80GPa → γ=6.25×10⁻⁴。校验:τ、G 两项必填守卫,G 作为分母不得为 0。判据:无固定分级,小变形下 γ 远小于 1,剪切角弧度值近似等于 γ 本身。

输入剪应力 τ 与剪切模量 G,求剪应变。

Formula & Standard References

Item Formula / Note Source / Standard
Shear form of Hooke law gamma = tau / G, where tau is the shear stress and G the shear modulus Timoshenko SP, Gere JM, Mechanics of Materials
Definition of shear strain gamma is the change in angle between two originally perpendicular line elements, in radians ISO 80000-4:2019, Quantities and units - Part 4: Mechanics
Small-deformation assumption tau = G · gamma holds only under small deformations and linear elasticity Timoshenko SP, Gere JM, Mechanics of Materials
Relation to normal strain In pure shear the principal strains are approximately gamma/2 Roark RJ, Young WC, Formulas for Stress and Strain
📌 计算说明
  • γ = τ/G。
  • τ=50MPa,G=80GPa → 6.25×10⁻⁴。

📚 深度解析:剪应变(材料)

💡 常见使用场景

公式
gamma = tau / G。剪应力 tau=10MPa、G=77GPa 时 gamma 约 1.3e-4(弧度)。剪应变是无量纲角变形。
与角度
小变形时 gamma≈tan(φ)≈φ(弧度),是直角的改变量。

❓ 常见问题(FAQ)

剪应变单位?
无量纲(弧度,因是长度比长度)。工程上直接以弧度表示直角变化。
剪应变和正应变区别?
正应变是伸缩(长度变化率),剪应变是角度畸变(直角改变);分别对应法向与切向载荷。