Forensic Engineers and Consultants

Blog Posts by: John Phillips

Author John Phillips

John_Phillips_WEB

Expertise Includes:

  • Cranes and Heavy Machinery
  • Failure Analysis
  • Fires and Explosions
  • Industrial Accident Reconstruction
  • Machinery Damage Assessment
Corrision-Pipes-2

Graphitic Corrosion – Difficult to determine before a failure!

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Graphitic corrosion is a process that may happen in equipment made of iron, particularly grey cast iron, but also ductile cast iron. Graphitic corrosion can lead to unexpected catastrophic failure of the affected part because the cast iron can lose its strength without a visible warning such as a change in size, shape, or appearance. Read More

Figure 1:  A view of the blower machinery.

Improper Design Leads to Fatigue Failure In Blower Shaft

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A blower used to exhaust air from an industrial process stopped functioning when the blower wheel drive shaft fractured.  The process, and thereby most of the plant, had to operate at a reduced volume until the blower wheel could be replaced.  The blower wheel had been installed during a shutdown a week before the incident.  The blower wheel was a spare installed when the existing blower wheel was sent for scheduled remanufacturing. Read More

A clevis pin with the spring clip attached.

Defective Clevis Pin Culprit in Runaway Trailer

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A large agricultural trailer had been connected to a truck using a clevis pin with a spring locking clip.  The trailer became disconnected from the truck and collided with an oncoming vehicle.  The trailer was in poor condition, did not have safety chains, and had substantial recent modifications by the owner. Read More

Figure 2: A Webshare photograph from a scan captured from the safety of a balcony in the workshop. The scanner operator never had to climb directly above the forklift to create the shot in Figure 1. The Webshare user can pan, zoom, and measure from the photograph. The grey target icons represent other scan locations on the ground.

Another Dimension of Engineering, Part 2: Visual Demonstrations Can Clarify the Issue

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Co-Authored with John Phillips, PE, CFEI

In our last post on 3D scanning, we introduced Warren’s new Faro Focus X 330 three dimensional scanner.  To recap, the Faro scanner combines three dimensional laser measurement with automated photography to capture 360-degree data from the real world. Potential applications include vehicle accident scenes and damaged vehicles, structural collapses, fire scenes, flood damage scenes, and machinery and equipment analysis, among others. In this post, we will highlight some of the outputs that can be created from the detailed data captured by the scanner. Read More

flooded-electrical-outlet

Flood Damage to Electrical Equipment

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As a result of the recent weather, those of us in South Carolina have gained a renewed appreciation of the damage that can result from flooding. Even a few inches of flood water can result in property damage and a loss of services in addition to the immediate risk of physical harm. Read More

A condensate drain that has been obstructed by nesting animals.

Air Conditioning Evaporators

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This is the third and final of three articles concerning the basics of air conditioning systems.  This article concerns the evaporator, a part of the air conditioning system that is usually unseen inside the air handling unit. The evaporator, in concert with a fan, supplies cool air to a building interior. Read More

A typical residential HVAC Unit.

Air Conditioning Condensing Units

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The condensing unit is a key component of all vapor compression air conditioning systems.  We are all familiar with condensing units as the noisy exterior portions of air conditioning systems that blow hot air to the environment. Read More

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Air Conditioning System Basics

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Air conditioning systems are everywhere in our lives – at home, in our vehicles, at work, in manufacturing facilities – yet most people give them little thought other than setting a comfortable temperature until they stop working or malfunction in some other way. Read More

Fractured toilet connection.  Wrench marks are visible on the fitting.

A Small Water Line Leads to a Large Loss

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A large oceanfront house was custom built after two years of planning and construction.  The house had three stories over an elevated foundation.  Shortly after the house was completed, the owners arrived one evening and found water pouring from above when they parked in the garage beneath the living spaces.   Read More

A hydraulic crane with a telescoping boom.

Crane Incident Handbook

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Cranes are powerful lifting devices that we see everyday in construction areas, shipping terminals, and industrial sites. They are so common that we often pass by them with little thought. Cranes, however, can easily become involved in incidents that injure people or damage equipment. Read More

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