U22011 Structural Integrity Assignment

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Reference no: EM132472001 , Length: word count:3000

U22011 - Structural Integrity - University of Portsmouth

Instructions:

You are expected to start with a literature review on the background and recent developments of the subject, followed by a search for material data and test standards, which should help you with the quantitative assessments. The report should follow the following format: introduction, literature review, methods, analysis, discussion, conclusions and references; and should be written clearly in technical terms, using figures/tables as necessary. References must be given and cited in the text. The word limit for the report is 3000 words (each up to 1500 words, or approximately 5 pages A4).

Project I: Damage Tolerance Analysis of Aero-Engine Fan Blade

You have just joined an engineering consulting firm specialising in damage tolerance analysis. Your client, an aero-engine manufacturer, requested a fracture mechanics analysis of fan blade (Fig. 1).

2418_Aero-engines.jpg

Fig. 1. Aero-engines in production at Rolls-Royce plc

Specifically, they requested that the component is to be simplified as a centre-cracked panel and the centrifugal force experienced as uniformly distributed tensile stresses across the ends of the panel. Ti-6Al-4V is used currently, and a conservative estimate of an initial defect size from two independent NDT inspections found 2a=0.5 mm. W=0.5m. The client is interested in the following information:

Part 1. Would fatigue crack growth occur under an operational cyclic stress range -30 to 220 MPa? What if the maximum stress is increased by 50% whilst the stress range stays the same?

Part 2. If the component is sufficiently strong to sustain an overload of 5 times of the maximum nominal stress 220 MPa?

Part 3. When an inspection should be scheduled, if this must be done at 70% of component life predicted for a baseline loading cycle 0 - 220 MPa?

Part 4. What if this major cycle is superimposed with a vibrational minor cycle 200-240 MPa? Should the inspection period be revised?

Although not part of the client's briefing, your project manager suggested that you should also:

Part 5. Find the background information on fan blades of aero-engines, and the essential material information about Ti-6Al-4V and its properties from literature. In particular: Fatigue threshold, ⊗Kth; Paris Law parameters C and m: da/dN = C⊗Km and Fracture toughness Kc.

Part 6. Check if Small Scale Yielding (SSY) condition is satisfied in all the cases you calculated and comment on the results.

Part 7. Research alternative materials to Ti-6Al-4V for fan blades in aero-engines. Discuss the pros and cons of the alternative materials compared with Ti-6Al-4V. Comment on how damage tolerant assessments should be conducted if alternative materials are used.

Project II: Life assessment of high temperature header piping and tube system

The project aims for a life assessment of a high temperature steam header piping and tube system at a power generation plant. The client has requested a life assessment to be performed on one of their superheater header, as shown in Figure 2.1, which is a central manifold for other piping runs that is used to convert saturated or wet steam into superheated or dry steam.

Attachment:- Structural Integrity.rar

Reference no: EM132472001

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U22011 Structural Integrity Assignment : U22011 Structural Integrity Assignment Help and Solution, University of Portsmouth - Assessment Writing Service - Damage Tolerance Analysis of Aero-Engine Fan
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