Problem Solving in Polymer Material Engineering Engineering Failure Analysis and Failure Mode Analysis of Components Structures: Polymers, Adhesives, Elastomers, Plastics and Polymer Composites

摘要

The results showed that Compression Stress Relaxation (static and dynamic sealing force decay) is the primary cause of the seals. Case 2: Failure analysis of Elastomeric Pipe Joints: In this study, the Arrhenius extrapolation technique with laboratory accelerated oven aging testing was used to establish the failure mode of Elastomeric Pipe Joints. Test Parameter: Accelerated Aging Test: Accelerated oven aging at 60°C, 80°C and 100°C Field Samples: a) Inside section b) Middle section c) Outside section Service Duration: Five years Average Service Temperature: 45°C Measurement Temperature: DSC induction time measurement Failure Mode Evaluation: Dynamic testing - Damping coefficient (N-sec/mm) Differential Scanning Calorimetry (DSC) ASTM D-3418-88: The sample was heated from 30°C to 300°C at 25°C per minute in helium for approximately 10 minutes. The sample was allowed to equilibrate for 6 minutes. After equilibrating, the gas purge was switched from helium to oxygen. DSC induction time was calculated based on time from introduction of the oxygen to completion of decomposition.