Compressive Stress–Strain Analyzer

Result	Value
Seating Region	—
Elastic Region	—
Yield Strain	—
Yield Stress	—
Hardening Region	—
Softening Region	—
Densification Region	—
Ultimate Compressive Strength (UCS)	—
Strain at UCS	—
Elastic Modulus	—
R² (Elastic Fit)	—
Energy to Densification	—
Energy to UCS	—

Optimizing elastic region…

Searching for the elastic window with maximum R² near your current selection.

Details

Analyze compressive test data by entering or uploading strain–stress values. The app automatically detects the ultimate compressive strength (UCS), estimates the elastic region, computes the elastic modulus from the best-fit linear segment, and generates a clean publication-style interactive graph.

About
Version: 1.0
Website: https://www.inanolab.com/micromeasure.html
Developer / Programmer: Dr. James Salveo Olarve
Affiliation: i-Nano Research Facility, De La Salle University Manila

📚 Citation Recommendation
If you use Compressive Stress–Strain Analyzer in academic work:

Olarve, J. S. L. (2026). Compressive Analyzerc. i-Nano Research Facility, De La Salle University Manila. Retrieved from https://www.inanolab.com/compressiontest.html
(Updated citation will be provided once DOI is assigned.)

Scientific Notes

Essential relationships

Stress: σ = F / A

Strain: ε = ΔL / L₀

Elastic modulus: E = Δσ / Δε in the initial linear region

Ultimate compressive strength (UCS): maximum stress reached on the curve

Yield (approx.): the elastic → plastic transition; reported here as Yield Strain and Yield Stress at the end of the Elastic Region.

Energy absorbed: area under the stress–strain curve, ∫σ dε (shown as MPa·strain). This represents energy per unit volume absorbed up to a chosen strain.

Key graph features

Seating region: very low stress with slight fluctuations; machine/sample settling and surface contact (not true material behavior).

Elastic region: nearly linear increase; deformation is reversible and the elastic modulus is obtained from the best-fit line here.

Hardening region: stress continues to increase after yielding as the material strengthens/compacts or work-hardens; slope is typically lower than the elastic region but increases compared with the immediate post-yield segment.

Softening region: stress increases slowly or plateaus; internal structure collapses and energy absorption dominates (common in foams/polymers).

Densification region: sharp rise in stress; material becomes fully compacted and resistance increases rapidly.

UCS point: the highest stress on the curve (maximum load the material withstands).

Compressive Stress–Strain Analyzer

Data Input

Analysis Results

Region editor