Failure analysis rules The failure investigator has only one objective to determine the failure mechanism that caused the failure and to use that knowledge to prevent another occurrence. Start with and maintain an open mind. Emotion obscures objectivity and must be edged from the investigation. The theory, however elegant, must agree with the observed evidence, however humble.
Failure analysis rules…? The simplest solution is the best solution. Having the wrong solution is frequently much worse than having no solution. Major incidents are often triggered by very minor or apparently innocuous details.
Failure analysis rules…? Only one thing is worse than knowing you have a crack growing in a component, and that is not knowing you have a crack growing in a component. Cracks never get smaller, nor do they ever disappear. Either they stay the same size (invariably in a minor, insignificant, or easily repaired component), or they get bigger (usually in a critical component).
QUATION FOR SUCCESSFUL FAILURE ANALYSIS Proper background information + correct analyses and tests + Thorough knowledge of materials behaviour and processing + Pertinent experience ______________________ Correct Analysis
FAKTOR KEGAGALAN 1. SALAH DISAIN : Apakah ada stress concentration (lubang, ulir, notch) Apakah Dimensinya sesuai ? Lost by wear or corrosion Haruskah Rigid atau Flexsible like spring? Apakah Part / Komponen memang didisain untuk mudah rusak atau memang untuk tahan rusak ?
FAKTOR KEGAGALAN 6. KONDISI OPERASI Ada unusual occurrence (abnormal)? (bunyi, bau, asap) Apakah terjadi over speed ? Apakah terjadi over load ? Apakah lingkungannya korosif? (temperature environment)