The Tragic Engineering Decisions Behind the Submersible Accident

⚠️Questionable engineering decisions led to the tragic collapse of the Oceangate submersible.

⚠️The use of a carbon fiber composite hull without proper testing and certification was a major risk factor.

⚠️The failure mode of composite materials under deep-sea pressure was not adequately considered in the design.

⚠️The lack of fatigue testing and reliance on acoustic monitoring raised serious safety concerns.

⚠️This incident underscores the need for rigorous testing and responsible engineering practices in high-risk industries.

What were the major engineering decisions that led to the submersible accident?

—The major engineering decisions include using a carbon fiber composite hull without proper testing and certification, failing to account for the unique failure mode of composites under deep-sea pressure, lack of fatigue testing, and relying on inadequate acoustic monitoring.

Why was the use of a carbon fiber composite hull a risk factor?

—Carbon fiber composites are not known for their compressive strength, making them unsuitable for submarine hulls that experience high pressure. The composite hull was not adequately tested or certified, further increasing the risk.

What is the failure mode of composite materials under deep-sea pressure?

—The failure mode of composite materials, such as carbon fiber composites, under deep-sea pressure involves delamination and buckling. The pressure compresses the hull, putting the fibers primarily under compression, which can lead to catastrophic failure.

Why is fatigue testing important in submarine design?

—Fatigue testing is essential in submarine design to assess the performance and durability of materials under repeated stress cycles. Without fatigue testing, the submersible's hull may not withstand the gradual damage incurred during dives to extreme depths.

What lessons can be learned from this incident?

—This incident highlights the importance of rigorous testing, responsible engineering practices, and adherence to safety standards in high-risk industries. It emphasizes the need for thorough certification processes, proper consideration of unique failure modes, and proactive measures to ensure the safety of personnel and equipment.

00:00On June 19th, the Oceangate submersible began its descent to the Titanic's remains in the North Atlantic.

06:16The design of the carbon fiber composite hull without proper testing and certification was a major risk factor.

09:30The failure mode of composites under deep-sea pressure, known as delamination coupled buckling, was not adequately considered.

11:51The lack of fatigue testing and reliance on inadequate acoustic monitoring raised serious safety concerns.

14:26This incident highlights the importance of rigorous testing and responsible engineering practices in high-risk industries.