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Lamé Thick-Walled Cylinder Pressure Vessel Hoop Stress Calculator

When vessel wall thickness exceeds 10% of radius, thin-wall assumptions break down.

Inside radius of thick cylinder

Outside radius of thick cylinder

Working internal hydraulic pressure

Calculated Result
58.3 MPa

Peak Inner Hoop Stress

Location

Bore surface (r = ri)

Calculation Breakdown

  1. Lamé Thick Cylinder Equationσ_θ = Pi(ro² + ri²) / (ro² - ri²) => 58.3 MPa

Stress Profile Across Wall

Interactive visualization based on your current inputs

sigma_t
0.015294458Inner Bore (ri)Mid-WallOuter Rim (ro)Radius LocationHoop Stress (MPa)

What Is the Lamé Thick-Walled Cylinder Pressure Vessel Hoop Stress Calculator?

When vessel wall thickness exceeds 10% of radius, thin-wall assumptions break down.

Gabriel Lamé solved the exact radial stress gradient, revealing that hoop stress peaks dramatically at the innermost bore.

How Does the Lamé Thick-Walled Cylinder Pressure Vessel Hoop Stress Calculator Work?

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

Lamé Thick-Walled Cylinder Pressure Vessel Hoop Stress Calculator Formula & Variables

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

\sigma_t(r_i) = P_i \frac{r_o^2 + r_i^2}{r_o^2 - r_i^2}

Lamé peak tangential hoop stress at inner bore radius.

How to Use the Lamé Thick-Walled Cylinder Pressure Vessel Hoop Stress 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

High-Pressure Hydraulic Ram

Input Values:

insideRadiusMm:50
outsideRadiusMm:100
internalPressureMpa:50

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

  • Autofrettage or compound shrink-fit rings are used to mitigate peak inner bore tensile stress.

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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