Reference no: EM132877277
KB7008 Advanced Stress and Structural Analysis - Northumbria University
Learning Outcome 1: Understand complex engineering theories relevant to the failure of materials through fracture and fatigue.
Learning Outcome 2: Utilise a critical and evaluative approach to solving complex problems.
Learning Outcome 3: Exercise creativity and initiative in the development of solutions to complex engineering problems.
Coursework Tasks
Delamination is a common failure mechanism within composite laminates. Delamination occurs when layers of fibre become separated. A technique to improve the delamination properties of composite laminates is z-pinning. Here, carbon fibre or metallic pins are inserted through the thickness of the laminate to improve the mode I fracture resistance (figure 1).
You will be provided with full geometric information (ASTM D5528) and data for double cantilever beam (DCB) tests of both unpinned and pinned carbon fibre/epoxy laminates. Furthermore, you will be provided with tensile test data that captures the z-pin pull-out behaviour. For this assessment, you will create a finite element model that predicts the mode I fracture of unpinned and pinned laminates (figure 2).
Your task has three aspects:
1. model the mode I fracture of an unpinned composite laminate and compare your predictions to experimental data
2. incorporate the non-linear behaviour of z-pins into your model and compare with experiment
3. reinforce a composite T-jointwith z-pinsto improve the interlaminar fracture resistance
Technical Report (max. four pages A4)
This task will be assessed through the submission of a technical report in the style of a scientific journal
article.
A marking rubric is provided and contains the following categories:
• Presentation
• Understanding and expression of the problem
• Finite element model setup
• Discussion of initial results - Prediction of unpinned composite
• Discussion of pinned composite results and T-Joint study
Attachment:- Advanced Stress and Structural Analysis.rar
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