Publication detail

Stress Analysis of the Ceramics Heads with different Sizes under the Destruction Tests

FUIS, V. JANÍČEK, P. NÁVRAT, T.

Original Title

Stress Analysis of the Ceramics Heads with different Sizes under the Destruction Tests

English Title

Stress Analysis of the Ceramics Heads with different Sizes under the Destruction Tests

Type

journal article - other

Language

en

Original Abstract

The global solved problem is the calculation of the parameters of ceramic material from a set of destruction tests of ceramic heads of total hip joint endoprosthesis. The standard way of calculation of the material parameters consists in carrying out a set of 3 or 4 point bending tests of specimens cut out from parts of the ceramic material to be analysed. In case of ceramic heads, it is not possible to cut out specimens of required dimensions because the heads are too small (if the cut out specimens were smaller than the normalised ones, the material parameters derived from them would exhibit higher strength values than those which the given ceramic material really has). A special destruction device for heads destruction was designed and the solved local problem is the modification of this destructive device based on the analysis of tensile stress in the head for two different values of the depth of the conical hole in the head. The goal of device modification is a shift of the location with extreme value of sigma1max from the region of heads hole bottom to its opening. This modification will increase the credibility of the obtained material properties of bioceramics, which will be determined from a set of head destructions using the Weibull weakest link theory.

English abstract

The global solved problem is the calculation of the parameters of ceramic material from a set of destruction tests of ceramic heads of total hip joint endoprosthesis. The standard way of calculation of the material parameters consists in carrying out a set of 3 or 4 point bending tests of specimens cut out from parts of the ceramic material to be analysed. In case of ceramic heads, it is not possible to cut out specimens of required dimensions because the heads are too small (if the cut out specimens were smaller than the normalised ones, the material parameters derived from them would exhibit higher strength values than those which the given ceramic material really has). A special destruction device for heads destruction was designed and the solved local problem is the modification of this destructive device based on the analysis of tensile stress in the head for two different values of the depth of the conical hole in the head. The goal of device modification is a shift of the location with extreme value of sigma1max from the region of heads hole bottom to its opening. This modification will increase the credibility of the obtained material properties of bioceramics, which will be determined from a set of head destructions using the Weibull weakest link theory.

Keywords

ceramic heads, depth of the conical hole, destruction test, material parameters, principal stress, total hip joint endoprosthesis

RIV year

2014

Released

11.12.2014

Location

Melbourne

ISBN

1307-6892

Periodical

World Academy of Science, Engineering and Technology

Year of study

8

Number

12

State

TR

Pages from

1748

Pages to

1752

Pages count

5

Documents

BibTex


@article{BUT111283,
  author="Vladimír {Fuis} and Přemysl {Janíček} and Tomáš {Návrat}",
  title="Stress Analysis of the Ceramics Heads with different Sizes under the Destruction Tests",
  annote="The global solved problem is the calculation of the parameters of ceramic material from a set of destruction tests of ceramic heads of total hip joint endoprosthesis. The standard way of calculation of the material parameters consists in carrying out a set of 3 or 4 point bending tests of specimens cut out from parts of the ceramic material to be analysed. In case of ceramic heads, it is not possible to cut out specimens of required dimensions because the heads are too small (if the cut out specimens were smaller than the normalised ones, the material parameters derived from them would exhibit higher strength values than those which the given ceramic material really has). A special destruction device for heads destruction was designed and the solved local problem is the modification of this destructive device based on the analysis of tensile stress in the head for two different values of the depth of the conical hole in the head. The goal of device modification is a shift of the location with extreme value of sigma1max from the region of heads hole bottom to its opening. This modification will increase the credibility of the obtained material properties of bioceramics, which will be determined from a set of head destructions using the Weibull weakest link theory.",
  booktitle="International Scholarly and Scientific Research & Innovation",
  chapter="111283",
  howpublished="print",
  number="12",
  volume="8",
  year="2014",
  month="december",
  pages="1748--1752",
  type="journal article - other"
}