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Damage phenomena in materials leading to fatigue fracture are treated through a methodology based on the knowledge of the stress state in the structure induced by the relevant loads of operation. The use of Paris law, as implemented in the code COVASTOL, allows an estimation of the residual lifetime of a structure subjected to variable time loads, as encountered in many industrial applications and, in particular, in the chemical and petrochemical field. The methodology proposed is based on the monitoring of the evolution of existing defects and the intensity of the corresponding loads. It aims to produce a management scheme concerning the evolution of the defects, in a probabilistic framework, which would guarantee safety and would aim at optimising the operational costs of the plant. This methodology could be applied in many industrial sectors where structural reliability is an important parameter in support of the decision making.

Additional information

Authors: PICCIOLO G, Enichem, Milano (IT);ATZORI B, Università di Padova, Dipartimento Ingegneria Meccanica (IT);GRASSINI U, Enichem Anticorrosione, Novara (IT);PAPADOPOULOS I V, JRC Ispra (IT);SOLOMOS G P, JRC Ispra (IT)
Bibliographic Reference: Paper presented: Affidabilità manutenibilità sicurezza qualità, Milano (IT), November 23-24, 1993
Availability: Available from (1) as Paper IT 38043 ORA
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