Numerical Investigation Of Static And Dynamic Loading Effects On An Edge-Crack Specimen
Author(s):
Muhammad Zeeshan Zahir†*, Arshad Mehmood†, Kareem Akhtar†
Affiliation(s):
†Department of Mechanical Engineering, UET Peshawar, Pakistan
*Corresponding Author Email: [email protected]
Corresponding Author Email:
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Ensuring the safety of structures and machinery requires a thorough understanding of how cracked materials behave under static and dynamic loading conditions. A sudden increase in crack growth under dynamic loading conditions can result in disastrous failure. Therefore, this study aimed to investigate the behavior of a cracked specimen by performing numerical analysis under both static and dynamic loading conditions. The study addressed three distinct problems. Firstly, we utilize numerical methods to determine the stress and displacement fields around the crack. Secondly, we numerically compute fracture parameters such as stress intensity factors and energy release rate. Finally, we establish a criterion to determine the conditions under which the crack would propagate, including the direction of propagation. To carry out the investigation, a finite element mesh was generated using CQUAD4, with a refinement near the crack. The analysis also considered the stress wave propagating in the specimen during dynamic loading. The study employed MSC Nastran, a highly accurate and versatile software package for finite element analysis. The predicted results were verified using relevant analytical results, and the accuracy in predicting fatigue life and crack path was found to be satisfactory.