4. (a) (i) Materials can be subject to structural failure via a number of various modes of failure. Briefly explain whic
Posted: Sun May 15, 2022 10:53 pm
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4. (a) (i) Materials can be subject to structural failure via a number of various modes of failure. Briefly explain which failure modes are the most important to consider for the analyses of the safety of a loaded structure? (ii) Identify what is meant by a safety factor and how this relates to the modes of failure identified above. (4 marks) (2 marks) (7 marks) (b) (i) Stresses can develop within a material if it is subject to loads. Describe, with the aid of diagrams the types of stresses that may be developed at any point within a loaded structure. (ii) Comment on how complex stresses at a point could be simplified to develop a reliable failure criteria and suggest the name of criteria which is commonly used to predict failure based on yield failure criteria in ductile materials. (iii) Suggest why a yield strength analysis may not be appropriate as a failure criteria for analysis of brittle materials. (5 marks) (2 marks)