MECH / Fracture Mechanics. (Spring ) Fracture Mechanics, M. Janssen, J. Zuidema and R.J.H. Wanhill, 2nd Edition, , Delft Univ Press. Engineering Fracture Mechanics 75 : – APA Cheng X, Petrov R, Zhao L, Janssen M. Fatigue crack growth in TRIP steel under. Find great deals for Fracture Mechanics by M. Janssen, R. J. H. Wanhill and J. Zuidema (, Hardcover). Shop with confidence on eBay!


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From transverse sections of retrieved cemented hip reconstructions, two FEA-models were fracture mechanics janssen. The cement—bone interface was modeled with cohesive elements. A torque was applied and the cement—bone interface micromotions, global stiffness and stem translation were monitored.


A sensitivity analysis was performed to investigate whether the cohesive model could be improved. All results were compared with experimental findings. That the original cohesive model resulted in a fracture mechanics janssen compliant macromechanical response; the motions were too large and the global stiffness too small.

Fracture mechanics / M. Janssen, J. Zuidema and R.J.H. Wanhill - Details - Trove

Fracture mechanics janssen the cohesive model was modified, the match with the experimental response improved considerably. Introduction Stable fixation at the fracture mechanics janssen interface is essential for the longevity of cemented components used in cemented total hip arthroplasty, since aseptic loosening at the cement—bone interface is the main reason for revision surgery [ 1 ].

The polymethymethacrylate PMMA bone cement used in cemented hip reconstructions is usually not osteoconductive and therefore physicochemical bonding between the bone and cement cannot be expected [ 23 ]. As a result, fixation between the bone and cement relies upon cement penetration into the bone [ 4 ] which results in a complex mechanical interlock between the two fracture mechanics janssen [ 5 ].

This degradation weakens the cement—bone interface considerably relative to the direct post-operative situation [ 9 ] making the cement—bone interface one of the most compliant regions in cemented hip reconstructions [ 6 ].

In previous finite element analyses FEA of cemented hip reconstructions, fracture mechanics janssen mechanical characteristics of the cement—bone interface have often been overly simplified. In several analyses the fracture mechanics janssen interface was considered to act as 1 an infinitely stiff interface [ 10 — 12 ]; 2 a frictional contact layer [ 1314 ]; or 3 as a layer fracture mechanics janssen soft tissue elements which represented osteolysis around the cement mantle [ 1516 ].

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fracture mechanics janssen However, the validity of these three approaches to represent the interface mechanics is debatable. Experiments with laboratory prepared cement—bone interface specimens [ 17 ] showed a huge variation in stiffness and strength, which was not consistent with the three aforementioned assumptions.

A more appropriate approach to model the actual mechanical response of the cement—bone interface is through use of using cohesive zone models [ 18 — 21 ].


In these cohesive zone models a constitutive relationship has to be defined, which describes the interaction between the interface fracture mechanics janssen and displacements in normal and shear direction [ 22 ]. Experiments in which fracture mechanics janssen interface specimens are loaded in multiple directions could serve as an input for the cohesive zone models [ 2324 ].

However, the huge variation in mechanical responses due to interfacial variations makes it very difficult to develop a comprehensive cohesive zone model using an experimental approach.

This is because each experimental specimen can only be loaded to failure in one direction, and the cohesive zone model requires a full description of the mixed-model failure response. An elegant alternative to study the mixed-mode failure response is the use of micromechanical FEA models [ 25 ].

Fracture Mechanics, Second Edition

Furthermore, sustained load fracture and dynamic crack growth are discussed, including various test techniques, e.

Finally, there are two chapters dealing with mechanisms of fracture and the ways in which actual material behaviour influences the fracturemechanics characterisation of crack growth.

This textbook is fracture mechanics janssen primarily for engineering students. It will be useful to practising fracture mechanics janssen as well, since it provides the background to several test and design methods and to criteria for material selection.

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