An isotropic brittle material is tested in the universal testing machine. The stress-strain diagram for the material shows a bi-linear elastic behavior as shown in the figure given below. The strain energy density is ________ MJ m⁻³ (rounded off to 2 decimal places).

GATE 2025 Mechanical Engineering Q58 — Mechanical Engineering

GATE 2025Set MasterQ58NATanswer keyexplanation soonmedium

Mechanical Engineering · Strength of Materials

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Drill mode: stress-strain · 1/7

Figure from the original GATE 2025 paper. (IIT Roorkee archive)

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Recurring concept

Strength of Materials has appeared in GATE Mechanical Engineering 8 times across 6 years (2019, 2021, 2023, 2024, 2025, ...).