Year: 2025
Type: article
Abstract: Cryogenic industries handling liquid hydrogen and helium require rigorous safety verification. However, current standards (ASTM, ASME, ISO) are optimized for LNG at −163 °C and remain inadequate for extreme cryogenic conditions such as −253 °C. As the temperature decreases, materials experience ductile-to-brittle transition, raising the risk of sudden fracture in testing equipment. This study presents a fuzzy-integrated reliability framework that combines fault tree analysis (FTA) and Failure Modes, Effects, and Criticality Analysis (FMECA). The method converts qualitative expert judgments into quantitative risk indices for use in data-scarce conditions. When applied to a cryogenic impact testing apparatus, the framework produced a total failure probability of 1.52 × 10−3, about 7.5% lower than the deterministic FTA result (1.64 × 10−3). These results confirm the framework’s robustness and its potential use in cryogenic testing and hydrogen systems.
Source: Applied Sciences
DOI: 10.3390/app152011280
Authors: Jae Il Bae, Young IL Park, Jeong-Hwan Kim
Institution: Dong-A University
Language: English
Topic: Risk and Safety Analysis
Subfield: Statistics, Probability and Uncertainty
Field: Decision Sciences
Domain: Social Sciences
Open Access status: gold
Estimated APC paid: $2,896
Award: G1010692705
OpenAlex ID: W4415403082