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ENEnglish繁中繁體中文ESEspañolARالعربيةFRFrançaisITItalianoPTPortuguêsRUРусскийDEDeutschJA日本語VITiếng ViệtKO한국어THไทยTRTürkçe

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Engineering Calculator · 119

Tensile Engineering Stress & Elongation Calculator

Normalize tensile force by original specimen area and measured extension by original gauge length.

Mechanical loads
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Live calculation

Enter the known values.

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01

Inputs

02

Results

Engineering tensile stress50MPa
Gauge-length elongation20%
Gauge-length extension10mm

Formula
σeng=FA0\sigma_{\mathrm{eng}}=\frac{F}{A_0}εeng=Lf−L0L0 100%\varepsilon_{\mathrm{eng}}=\frac{L_f-L_0}{L_0}\,100\%

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Direct answer

What this result means

Engineering tensile stress is force divided by original cross-sectional area. Percentage elongation is the gauge-length increase divided by original gauge length, multiplied by 100. A 1,000 N force on 20 mm² gives 50 MPa; a gauge length increasing from 50 to 60 mm gives 20% elongation.

Tensile Engineering Stress & Elongation Calculator engineering relationship diagramOriginal area defines engineering stress, whereas true stress uses the instantaneous area. Entering peak force from a valid tensile test yields the engineering UTS calculation. A single arbitrary force value does not identify the peak, yield strength or a complete stress–strain curve. This dedicated schematic represents tensile original area gauge extension and is not to scale.L₀L_fOriginal A₀σ = F / A₀MEASURED SPECIMEN DATA · TOOL 119Measured tensile forceEngineering tensile stress
Calculator-specific engineering relationship diagram — schematic, not a product drawing, and not to scale.

Formula & theory

Make the assumptions visible.

Original area defines engineering stress, whereas true stress uses the instantaneous area. Entering peak force from a valid tensile test yields the engineering UTS calculation. A single arbitrary force value does not identify the peak, yield strength or a complete stress–strain curve.

Calculation relationship
σeng=FA0\sigma_{\mathrm{eng}}=\frac{F}{A_0}εeng=Lf−L0L0 100%\varepsilon_{\mathrm{eng}}=\frac{L_f-L_0}{L_0}\,100\%

Original area defines engineering stress, whereas true stress uses the instantaneous area. Entering peak force from a valid tensile test yields the engineering UTS calculation. A single arbitrary force value does not identify the peak, yield strength or a complete stress–strain curve.

Formula terms

Variables

A₀Original specimen cross-sectional areamm²
LfMeasured final gauge length at the stated test stagemm

Use sequence

From measurement to review

  1. Record material, specimen dimensions, test method, conditioning and the force/length measurement stage.
  2. Enter force, original area and the original and final gauge lengths.
  3. Use peak-force data for UTS and the prescribed gauge-length procedure for the elongation property being reported.

Limits

What this calculation does not confirm

  • Force is a nonnegative magnitude and the final gauge length is at least the original length.
  • Engineering quantities use original dimensions; necking and instantaneous area are not evaluated.
  • Metals, plastics and elastomers use different tensile-test procedures. These calculations do not establish a complete gland’s retention strength.

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Calculator FAQ

Use the number without losing the engineering context.

These answers clarify what the tool calculates and where a product-specific review still begins.

01Calculator guidanceWhen does force divided by original area represent UTS?

When the force is the maximum tensile force obtained in a valid test and the area is the prescribed original specimen area. The tool does not find a peak from a data series.

02Calculator guidanceCan specimen tensile strength replace a gland cable-retention test?

No. Material stress describes a specimen, while retention depends on the complete gland, cable, clamping arrangement and test procedure. Verify the product’s relevant retention evidence separately.

03Calculator guidanceCan under-load extension be reported as elongation after fracture?

Those measurements are different. Follow the applicable method for gauge marks, specimen reassembly, extensometer use and reporting; state the measurement stage with the result.

Product selection support

Connect the calculation with cable-entry product options.

Bepto Cable Glands can help relate a preliminary result to the product family and current model information for your application. You can start with the details you have; a complete drawing package is not needed to ask a question.

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