Sofronas, A.
Tony Sofronas, D. Eng, was the worldwide lead mechanical engineer for ExxonMobil Chemicals before retiring. He now owns Engineered Products, which provides consulting and engineering seminars on machinery and pressure vessels. Dr. Sofronas has authored two engineering books and numerous technical articles on analytical methods.
Case 66: Fiberglass mixing tank flexing vibration
The design of fiberglass and polymer tanks had many problems in the 1980s. Most of these problems were resolved with experience, new materials and manufacturing techniques, along with new national con..
Case 65: Taking risks and making high-level presentations
Tips on how to communicate with managers
Case 64: Averages can be misleading on service life data
Take care when making important decisions on data
Case 63: Analyzing off resonance amplitudes
It is important to know the amplitudes of vibration away from resonance
Case 62: Useful shaft stress equations to remember
Committing several equations to memory can be useful
Case 61: Pressure loss in a reactor
Much information is available from a simple analysis
Case 60: Socket-weld failures
A risk analysis can determine which critical welds to repair
Case 59: Heat-up rates and thermal cracking
A good analysis is usually better than speculation
Case history 58: Piston pin plug wear
A wear analysis can help when failure data are meager
Case 57: Troubleshooting the cause of sudden impacts
Finding the cause can be elusive but calculations help
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