Residual strength evaluation under mixed mode loading

This work explores the failure resistance of fatigue damages with random orientation through a new computational framework. Such analytical model aims to enable designers to properly and quickly assess stress state and residual life under cyclic loading with constant amplitude and overload, employing suitable fracture mechanics-based concepts. The efficiency of estimates obtained is discussed by means of relevant mixed-mode tests available in the literature.

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Observations and modelling of non-proportional mixed mode cyclic loading

MATEC Web of Conferences ◽

10.1051/matecconf/201930001002 ◽

2019 ◽

Vol 300 ◽

pp. 01002

Author(s):

Michael Vormwald

Keyword(s):

Cyclic Loading ◽

Mixed Mode ◽

Normal Force ◽

Fatigue Cracks ◽

Influence Factors ◽

Growth Behavior ◽

Crack Growth Behavior ◽

Mixed Mode Loading ◽

Prediction Tools ◽

Engineering Environment

Under non-proportional mixed-mode loading conditions at the crack tip, some observations are reported. They are limited to cases of cylindrical specimens under normal force and torsion. The fatigue cracks have been initiated by the same loading for which the crack growth behavior has been studied. The observations are discussed against the background of a variety of influence factors on non-proportional mixed mode growth. Finally, a couple of modeling approaches are listed which are – according to the nature or the problem – not yet developed for providing prediction tools in an engineering environment.

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FINITE ELEMENT SIMULATION OF ELASTIC AND QUASI – STATIC CRACK PROPAGATION UNDER MIXED MODE LOADING CONDITIONS

The International Conference on Applied Mechanics and Mechanical Engineering ◽

10.21608/amme.2016.35385 ◽

2016 ◽

Vol 17 (17) ◽

pp. 1-15

Author(s):

S. Yossif

Keyword(s):

Finite Element ◽

Crack Propagation ◽

Finite Element Simulation ◽

Mixed Mode ◽

Loading Conditions ◽

Mixed Mode Loading ◽

Static Crack ◽

Element Simulation

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Selected Aspects of Cohesive Zone Modeling in Fracture Mechanics

Metals ◽

10.3390/met11020302 ◽

2021 ◽

Vol 11 (2) ◽

pp. 302

Author(s):

Wiktor Wciślik ◽

Tadeusz Pała

Keyword(s):

Cohesive Zone ◽

Mixed Mode ◽

Review Paper ◽

Failure Process ◽

Cohesive Zone Modeling ◽

Mixed Mode Loading ◽

Cohesive Models ◽

Cohesive Modeling ◽

Zone Modeling ◽

Intensive Development

This review paper discusses the basic problems related to the use of cohesive models to simulate the initiation and development of failure in various types of engineering issues. The most commonly used cohesive zone models (CZMs) are described. Recent achievements in the field of cohesive modeling are characterized, with particular emphasis on the problem of mixed mode loading, the influence of the strain rate, the stress state triaxiality, and fatigue. A separate chapter of the work is devoted to the identification of cohesive parameters. Examples of the use of CZMs for the analysis of the fracture and failure process in various applications, both on the macro and microscopic scale, are given. The directions of CZMs development were indicated as well as the issues that are currently under particularly intensive development.

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