Fatigue
of Ceramics
It has long
been assumed that because dislocation motion in ceramics is limited, strain
hardening and consequent crack extension during cyclic loading would not occur,
and hence ceramics were not susceptible to fatigue damage. And indeed, ceramics
with homogeneous microstructures such as glass or very fine-grained
single-phase ceramics do not appear to be susceptible to cyclic loadings. However, more recently, with the development of tougher ceramics that exhibit
R curve behavior, such as transformation-toughened zirconia and whisker- and
fiber-reinforced ceramics, it is becoming clear that the situation is not as
simple as first thought. Recent data seem to suggest that R curve behavior can
be detrimental to fatigue life
It has long been assumed that because dislocation motion in ceramics is limited, strain hardening and consequent crack extension during cyclic loading would not occur, and hence ceramics were not susceptible to fatigue damage. And indeed, ceramics with homogeneous microstructures such as glass or very fine-grained single-phase ceramics do not appear to be susceptible to cyclic loadings. However, more recently, with the development of tougher ceramics that exhibit R curve behavior, such as transformation-toughened zirconia and whisker- and fiber-reinforced ceramics, it is becoming clear that the situation is not as simple as first thought. Recent data seem to suggest that R curve behavior can be detrimental to fatigue life
المادة المعروضة اعلاه هي مدخل الى المحاضرة المرفوعة بواسطة استاذ(ة) المادة . وقد تبدو لك غير متكاملة . حيث يضع استاذ المادة في بعض الاحيان فقط الجزء الاول من المحاضرة من اجل الاطلاع على ما ستقوم بتحميله لاحقا . في نظام التعليم الالكتروني نوفر هذه الخدمة لكي نبقيك على اطلاع حول محتوى الملف الذي ستقوم بتحميله .
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