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Timoshenko Beam Total Flexural & Shear Deflection Calculator

Classical Euler-Bernoulli beam theory ignores transverse shear strain, assuming plane sections remain perpendicular to the neutral axis.

Concentrated load at beam midspan

Center-to-center support span

Cross-sectional height/depth

Cross-sectional width

Material tensile modulus of elasticity

Material shear modulus

Calculated Result
0.24 mm

Total Center Deflection

Bending Component

0.22 mm

Shear Contribution

5.7 %

Calculation Breakdown

  1. Timoshenko Total Deflectionδ_total = δ_bend + δ_shear => 0.24 mm

Deflection Components

Interactive visualization based on your current inputs

Deflection
0.00.30.50.81.0Bending DeflectionShear DeflectionTotal TimoshenkoComponentDeflection (mm)

What Is the Timoshenko Beam Total Flexural & Shear Deflection Calculator?

Classical Euler-Bernoulli beam theory ignores transverse shear strain, assuming plane sections remain perpendicular to the neutral axis.

Stephen Timoshenko introduced shear deformation, proving that for deep, stubby beams (L/h < 10), shear deformation accounts for substantial deflection.

How Does the Timoshenko Beam Total Flexural & Shear Deflection Calculator Work?

The calculation evaluates user-provided measurements using recognized domain equations, converts between measurement units, and adjusts for real-world efficiency factors.

Timoshenko Beam Total Flexural & Shear Deflection Calculator Formula & Variables

The core mathematical equation utilized by this calculator is expressed as:

\delta_{total} = \frac{P L^3}{48 E I} + \frac{P L}{4 \kappa G A}

Timoshenko combined bending and shear deflection equation.

How to Use the Timoshenko Beam Total Flexural & Shear Deflection Calculator

  1. Enter your primary measurements in the input fields above.
  2. Select your preferred units (e.g. metric or imperial) if applicable.
  3. Review or adjust operational assumptions such as field efficiency.
  4. Click Calculate to instantly generate the full results breakdown and visual chart.
  5. Use the Reset button at any time to clear the form and test a new scenario.

Step-by-Step Example Calculation

Heavy Machine Transfer Rail Girder

Input Values:

pointLoadPKn:80.0
beamSpanLM:1.5
depthHMm:300
widthBMm:150
youngModulusGpa:205
shearModulusGpa:79

Understanding Your Result

Your calculated result represents the realistic operational capacity or baseline output under the specified conditions. Comparing theoretical and effective outputs reveals the direct impact of turns, overlap, and practical downtime.

Factors That Affect the Result

Field terrain, operator experience, equipment maintenance, overlap margin, and weather conditions can significantly influence real-world output.

When Should You Use This Calculator?

Use this calculator whenever you need quick, verified estimates for job planning, budgeting, equipment sizing, or project timelines.

Assumptions & Limitations

  • Shear correction coefficient κ = 5/6 for solid rectangular cross-sections.

Frequently Asked Questions

Calculation Accuracy & Reference Note

This calculator implements verified, deterministic mathematical equations based on published standards. Results should be treated as professional engineering estimates; always verify critical operations with local equipment manuals and site inspections.

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