Session 2.6: Features & Characteristics

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Session 2.6: Features & Characteristics

SESSION 2.6 OUTLINE

2.6.1 Part Features 2.6.2 Part & Part-Pair Characteristics 2.6.3 Part Internal Environment

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Session 2.6: Features & Characteristics

DISCUSSION 2.6 FEATURES & CHARACTERISTICS

Part & Pair Characteristics provide additional information on the operation and usage of an item Features are used to define specific locations of a part where a failure mechanism acts on Environmental Characteristics allow the user to define the local conditions impacting a part All 3 modeling capabilities are accessible for parts (only pair characteristics for part-pairs)

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Session 2.6: Features & Characteristics

DISCUSSION 2.6.1 PART FEATURES

Features are used to identify specific areas or aspects of a part Main purpose is to provide additional detail to a failure diagram

   E.g. a crack occurred on the keyway of a shaft

Provided with a features taxonomy to assist user New features can be added if no default features are applicable

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Session 2.6: Features & Characteristics

EXERCISE 2.6.1 PART FEATURES

To assign part features:

Open the system model for the Fuel Tank' Right-click the Lining' and select Features Select the Inner Surface feature Select

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Session 2.6: Features & Characteristics

EXERCISE 2.6.1 PART FEATURES (CONTINUED)

Open the Failure Diagram for the `Lining' part Right-click the Corrosive attack mechanism and select Features Verify Feature dialog opens Select Inner Surface and then select

   The mechanism will now show it is occurring on the inner surface of the lining

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Session 2.6: Features & Characteristics

DISCUSSION 2.6.2 PART & PART-PAIR CHARACTERISTICS

Characteristics are used to identify the specific operation of a part or pair They can be used to identify the loading types and states The loading can advise potential methods of failure

   E.g. a part in torsion, is likely to be susceptible to torsion or shearing mechanisms

Future enhancements will look at automatically recommending failure concepts based on characteristics

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Session 2.6: Features & Characteristics

EXERCISE 2.6.2 PART & PART-PAIR CHARACTERISTICS

To specify part characteristics:

Right-click the Lining' part and select Characteristics Select Internal Pressure as the loading type Select Transient Load for the loading factor Select Low for the time factor Select Navigate to the Failure Diagram of the Lining' Note the Characteristics in the bottom-right corner

   The characteristics are used to inform the user of the appropriate failure concepts to build

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Session 2.6: Features & Characteristics

DISCUSSION 2.6.3 PART INTERNAL ENVIRONMENT

Internal environment is used to identify the local operating temperature of the item

The internal environment is supposed to define internal environment while the system environment defines the external environment

   Bottom-up vs. top-down

The environment can advise potential failures

   E.g. high temperature may lead to temperature induced mechanisms

Future enhancements will look at automatically recommending failure concepts based on internal environment

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Session 2.6: Features & Characteristics

EXERCISE 2.6.3 PART INTERNAL ENVIRONMENT

To assign an internal environment:

Right-click the `Lining' and select Environment Select Corrosive Environment from Liquid and Solid Contamination Select the operating temperature as: Medium Select temperature time factor as: Steady Select

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Session 2.6: Features & Characteristics

EXERCISE 2.6.3 PART INTERNAL ENVIRONMENT (CONTINUED)

Navigate to the Failure Diagram of the `Lining' part Note the Environment in the bottom-right corner Locate Buildup of debris in Failure Concepts

   Note: This mechanism is located in the Material transfer folder

Drag Mechanism into the Failure Diagram

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Session 2.6: Features & Characteristics

EXERCISE 2.6.3 PART INTERNAL ENVIRONMENT (CONTINUED)

Simplify the failure diagram by removing duplicated Insufficient cleaning

Note: Insufficient cleaning to be connected to AND gates of Buildup of debris as per Failure Condition template

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Session 2.6: Features & Characteristics

EXERCISE 2.6.3 PART INTERNAL ENVIRONMENT (CONTINUED)

Navigate to the Failure Diagram of the `Inlet_Lining' Part-pair Connect the Faults to Supply Liquid Static pressure

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Session 2.6: Features & Characteristics

SESSION 2.6 SUMMARY

2.6.1 Part Features 2.6.2 Part & Part-Pair Characteristics 2.6.3 Part Internal Environment