A novel simulation for the design of a low cycle fatigue experimental testing programme

Abstract

This paper proposes an innovative concept for the design of an experimental testing programme suitable for causing Low Cycle Fatigue crack initiation in a bespoke complex notched specimen. This technique is referred to as the Reversed Plasticity Domain Method and utilises a novel combination of the Linear Matching Method and the Bree Interaction diagram. This is the first time these techniques have been combined in this way for the calculation of the design loads of industrial components. This investigation displays the capabilities of this technique for an industrial application and demonstrates its key advantages for the design of an experimental testing programme for a highly complex test specimen

Cyclic plasticity and creep-cyclic plasticity behaviours of the SiC/Ti-6242 particulate reinforced titanium matrix composites under thermo-mechanical loadings

“…The LMM DSCA method was further extended by Chen et al [23] to evaluate a structural response to creep-cyclic plasticity behaviour in the steady state. The extended Direct Steady Cycle Analysis method (eDSCA) has been actively being utilised to assess the low cycle fatigue, and the creepfatigue damages [24,25]. A flowchart of the LMM eDSCA procedures is attached in the appendix.…”

“…Validity and applicability of the LMM framework have been also acknowledged by a variety of commercial industry partners [25][26][27], in particular the LMM DSCA method has been selected by R5 research programme of EDF energy to the commercial standard [9]. In particular for the composite materials, the eDSCA was employed to analyse the cyclic creep and plastic behaviours [28][29][30].…”

A compact constitutive model to describe the viscoelastic-plastic behaviour of glassy polymers: Comparison with monotonic and cyclic experiments and state-of-the-art models

“…The components may also be coated by polymers. Concurrently, failures of components due to damage under cyclic long-term loadings have been assessed to be the most significant cause of huge financial losses, Ritchie (1999); Beesley et al (2017). Despite the importance of polymer components, their cyclic deformation behavior is still under-researched, and much effort is needed to improve their cyclic deformation properties and to develop capable tools for their failure assessment.…”

“…A recent research that is focused on the ratcheting and fatigue behaviors under cyclic loading processes (group 4) can be found from Krairi and Doghri (2014); Jiang et al (2015); Beesley et al (2017); Kang and Kan (2017); Shojaei and Volgers (2018); Holopainen and Barriere (2018); Qi et al (2019), i.e. work on the cyclic deformation behavior of amorphous polymers is very limited.…”

“…work on the cyclic deformation behavior of amorphous polymers is very limited. Beesley et al (2017) introduces an elastic-plastic model to simulate the low-cycle fatigue of notched specimens made of a nickel based alloy. A hyperelastic-viscoplastic model in Shojaei and Volgers (2018) and a parallel rheological network model (elastic-viscoplastic) in Qi et al (2019) provide capable tools for the investigation of both low and high cycle regimes of a highly-crystalline and semicrystalline polymers, respectively.…”