Innovation in lifetime prediction of rigid polyurethane foam through random vibration and comparison with conventional methods

Article Nuclear Science & Technology

Optimization analysis of HTR-PM600 fresh fuel transport container under multiple impact loading conditions

Yuchen Hao et al.

Summary: This study aims to investigate and optimize the lightweight and safety performance of the HTR-PM600 transport container under multiple impact loading conditions. Through parametric study and optimization design, the optimal design with superior safety performance and lightweight improvement is obtained.

ANNALS OF NUCLEAR ENERGY (2022)

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Article Engineering, Mechanical

Failure behaviour of strain and acceleration signals using various fatigue life models in time and frequency domains

N. Santharaguru et al.

Summary: This study aims to determine the appropriate frequency domain methods for durability predictions of lower suspension arm based on real-life random vibration data. The power spectral densities of the vibration signals were obtained and analysed using three PSD cycle counting models. Correlation between fatigue lives predicted by time domain and frequency domain methods were evaluated to determine the appropriate frequency domain methods for durability prediction. Road surfaces were found to affect the fatigue life of the lower control arm, with rougher surfaces leading to lower fatigue life. Lalanne and Dirlik PSD cycle counting algorithm were found to be the most suitable method for vibration fatigue analysis of lower suspension arm.

ENGINEERING FAILURE ANALYSIS (2022)

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Article Nuclear Science & Technology

Study on the most severe condition for structural assessment of nuclear fuel transport package under impact loading

Yuchen Hao et al.

Summary: An integrated method combining grey relational analysis (GRA) method and the quaternary triangular mesh (QTM) spherical sampling model is proposed to determine the maximum damage of nuclear fuel transport packages under drop loading. Experimental design and analysis are conducted to identify the most severe condition of the packages. This study provides important reference for improving the design of nuclear packages.

PROGRESS IN NUCLEAR ENERGY (2022)

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Article Polymer Science

Degradation of sunlight exposure on the high-density polyethylene (HDPE) pipes for transportation of natural gases

Yi Gong et al.

Summary: The study conducted a long-term natural weathering test on PE100 class high-density polyethylene pipes exposed to sunlight for up to 24 months, investigating the aging process and mechanism. The results showed that the natural weathering test is the optimal method for evaluating material performance degradation.

POLYMER DEGRADATION AND STABILITY (2021)

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Article Polymer Science

Identification and Evaluation of Hazardous Pyrolysates in Bio-Based Rigid Polyurethane-Polyisocyanurate Foam Smoke

Sanita Reinerte et al.

Summary: This study analyzed rigid polyurethane (PU) and polyisocyanurate (PIR) foam samples made from renewable material through pyrolysis gas chromatography mass spectrometry (Py-GC/MS). The main thermal degradation components were found to originate from the decomposition of isocyanate, forming suspected carcinogens and mutagens. The focus was on identifying and evaluating the relative quantities of the produced gaseous products and examining their hazardousness.

POLYMERS (2021)

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Article Materials Science, Multidisciplinary