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EMT701 Augment 2022 Questions Damage in composites 11 A unidirectional/pony composite pate having a contra through thickness crack of length 3a is subjected to a una stress, as shown in the figure below. The unidirectionat fibres are oriented at an ange with respect to the direction of the car, where is radians The model fracture toughness of the composite varies with the angle according to the empirical equation RRIT 10.732 +0.19 kg where KINO.147 MPamiz is the fracture toughs at the angle case. when the crack is parallel to the libre direction The applied stress is 150 MPa Figurel: Griffith crack: A through thickness crack in a united plate of infinite with Gibson 2010) Determine the critical sex for the cases, where the crack perpendicular to the i parallel to the fibres (101 1.2 Discuss the interfacial sliding mechanisms the following 1.21 PMC'S 1.22 SCS 1141 Question Fatigue of composites 2.1 Discuss the three regions of fatigue tu dgram for MMC'S 2.2 Mention at least two benefits of fatigue terms 1101 Question Design of composites 3.1 When designing composites, the couple of design object which need to be taken into consideration List five specific application requirements which are induced 15) 32 What is the safety factor values which must be taken into coderation ist ve safety factors 33 What are the advantages and disadvantage of fabric compose
2022 EMT3701 Assignment no. 2 [16] Question 4 Non-destructive testing of composites 3.1 What is the purpose of non destructive testing in composites 3.2 Briefly explain the process of > Radiography 3.3 Give at least three inhomogeneity factors that can affect composites performance (3) 14) (3) [10] Total: 50 UNISA 2022