Journal & Issues

Volume 22 (2022): Issue 4 (December 2022)

Volume 22 (2022): Issue 3 (September 2022)

Volume 22 (2022): Issue 2 (June 2022)

Volume 22 (2022): Issue 1 (March 2022)

Volume 21 (2021): Issue 4 (December 2021)

Volume 21 (2021): Issue 3 (September 2021)

Volume 21 (2021): Issue 2 (June 2021)

Volume 21 (2021): Issue 1 (March 2021)

Volume 20 (2020): Issue 4 (December 2020)

Volume 20 (2020): Issue 3 (September 2020)

Volume 20 (2020): Issue 2 (June 2020)

Volume 20 (2020): Issue 1 (March 2020)

Volume 19 (2019): Issue 4 (December 2019)

Volume 19 (2019): Issue 3 (September 2019)

Volume 19 (2019): Issue 2 (June 2019)

Volume 19 (2019): Issue 1 (March 2019)

Volume 18 (2018): Issue 4 (December 2018)

Volume 18 (2018): Issue 3 (September 2018)

Volume 18 (2018): Issue 2 (June 2018)

Volume 18 (2018): Issue 1 (March 2018)

Volume 17 (2017): Issue 4 (December 2017)

Volume 17 (2017): Issue 3 (September 2017)

Volume 17 (2017): Issue 2 (June 2017)

Volume 17 (2017): Issue 1 (March 2017)

Volume 16 (2016): Issue 4 (December 2016)

Volume 16 (2016): Issue 3 (September 2016)

Volume 16 (2016): Issue 2 (June 2016)

Volume 16 (2016): Issue 1 (March 2016)

Volume 15 (2015): Issue 4 (December 2015)

Volume 15 (2015): Issue 3 (September 2015)

Volume 15 (2015): Issue 2 (June 2015)

Volume 15 (2015): Issue 1 (March 2015)

Volume 14 (2014): Issue 4 (December 2014)

Volume 14 (2014): Issue 3 (September 2014)

Volume 14 (2014): Issue 2 (June 2014)

Volume 14 (2014): Issue 1 (March 2014)

Volume 13 (2013): Issue 4 (December 2013)

Volume 13 (2013): Issue 3 (September 2013)

Volume 13 (2013): Issue 2 (June 2013)

Volume 13 (2013): Issue 1 (March 2013)

Volume 12 (2012): Issue 4 (December 2012)

Volume 12 (2012): Issue 3 (October 2012)

Volume 12 (2012): Issue 2 (June 2012)

Volume 12 (2012): Issue 1 (March 2012)

Volume 11 (2011): Issue 4 (December 2011)

Volume 11 (2011): Issue 3 (September 2011)

Volume 11 (2011): Issue 2 (June 2011)

Volume 11 (2011): Issue 1 (March 2011)

Volume 10 (2010): Issue 4 (December 2010)

Volume 10 (2010): Issue 3 (September 2010)

Volume 10 (2010): Issue 2 (June 2010)

Volume 10 (2010): Issue 1 (March 2010)

Volume 9 (2009): Issue 4 (December 2009)

Volume 9 (2009): Issue 3 (September 2009)

Volume 9 (2009): Issue 2 (June 2009)

Volume 9 (2009): Issue 1 (March 2009)

Volume 8 (2008): Issue 4 (December 2008)

Volume 8 (2008): Issue 3 (September 2008)

Volume 8 (2008): Issue 2 (June 2008)

Volume 8 (2008): Issue 1 (March 2008)

Journal Details
Format
Journal
eISSN
2083-4799
ISSN
1730-2439
First Published
23 Sep 2008
Publication timeframe
4 times per year
Languages
English

Search

Volume 8 (2008): Issue 2 (June 2008)

Journal Details
Format
Journal
eISSN
2083-4799
ISSN
1730-2439
First Published
23 Sep 2008
Publication timeframe
4 times per year
Languages
English

Search

14 Articles
Open Access

Identyfikacja Obiektu Wibroakustycznego za Pomocą Modeli Nieparametrycznych

Published Online: 17 Oct 2008
Page range: 5 - 11

Abstract

Keywords

  • transmitancja
  • gęstość widmowa
  • funkcja korelacji
Open Access

Genetyczne Wspomaganie Konstrukcji Rozdrabniaczy Wielotarczowych

Published Online: 17 Oct 2008
Page range: 12 - 19

Abstract

Keywords

  • wspomaganie konstrukcji rozdrabniaczy
  • algorytmy genetyczne
Open Access

Zastosowanie Metody Nakładania Obrazów do Oceny Mikronierówności Powierzchi W Ruchu

Published Online: 17 Oct 2008
Page range: 20 - 27

Abstract

Keywords

  • metoda nakładania obrazów
  • chropowatość powierzchni
  • ruch powierzchni
Open Access

Zastosowanie Skaterometrii Laserowej I Analizy Obrazu do Oceny Mikronierówności Powierzchni Regenerowanych Przez Napawanie Laserowe I Plazmowe

Published Online: 17 Oct 2008
Page range: 28 - 35

Abstract

Keywords

  • skaterometrii laserowa
  • analiza obrazu
  • chropowatość powierzchni
  • napawanie laserowe
  • napawanie plazmowe
Open Access

Ocena Mikronierówności Powierzchni Frezowanych Z Zastosowaniem Optycznych Metod Pomiarowych I Analizy Obrazu

Published Online: 17 Oct 2008
Page range: 36 - 43

Abstract

Keywords

  • optyczne metody pomiarowe
  • analiza obrazu
  • chropowatość powierzchni
  • frezowanie
Open Access

Mechanical Surface Treatments for Improving Fatigue Behavior in Titanium Alloys

Published Online: 17 Oct 2008
Page range: 44 - 52

Abstract

Mechanical Surface Treatments for Improving Fatigue Behavior in Titanium Alloys

Mechanical surface treatments such as shot peening or ball-burnishing induce high dislocation densities and residual compressive stresses in near-surface regions. In addition, the surface roughness is changed. Micro-hardness and residual stress-depth profiles are evaluated in Ti-6Al-4V as a function of the Almen intensity being the main process parameter in shot peening. In the finite life regime, residual compressive stresses are shown to drastically increase the fatigue life by retarding crack growth from the surface into the interior. However, in the HCF regime a shift in crack nucleation site occurs from the surface to subsurface regions where residual tensile stresses balance the outer compressive stress field. Therefore, the tensile mean stress sensitivity of the fatigue strength which can largely vary in Ti-6Al-4V needs to be taken into account in order to understand the observed differences in HCF responds to shot peening.

Keywords

  • shot peening
  • residual stresses
  • crack nucleation
  • micro-crack propagation
Open Access

Poprawa Własności Wibroizolacyjnych Siedziska Operatora Maszyny Roboczej Poprzez Aktywne Sterowanie Zawieszeniem

Published Online: 17 Oct 2008
Page range: 53 - 60

Abstract

Keywords

  • system zawieszenia siedziska
  • aktywne sterowanie zawieszeniem
Open Access

Użyteczność Obliczeniowej Mechaniki Spawania W Procesie Kształtowania Technologii

Published Online: 17 Oct 2008
Page range: 61 - 68

Abstract

Keywords

  • spawalność
  • OMS
  • stale
  • modelowanie matematyczne mechanika pękania
Open Access

Weldability of Titanium and its Alloys - Progress in Joining

Published Online: 17 Oct 2008
Page range: 69 - 76

Abstract

Weldability of Titanium and its Alloys - Progress in Joining

The weldability aspects of the some advances materials, such as Titanium and its alloys: Titanium Aluminide - Intermetallics, still require further research and development. The power beam welding processes are considered in this work since these processes are capable of joining a wide range of new materials of interest in aerospace industry as well as in the many other industrial applications and offer remarkable advantages over conventional fusion welding processes. In this paper have been defined the following questions: - the weldability of Ti and its alloys, a new class of titanium alloys and their weldability, welding metallurgy and processes for joining.

Keywords

  • weldability of Ti and alloys
  • power beam welding
  • joining Ti and its alloys
Open Access

Wpływ Utleniania W Wysokich Temperaturach na Struktury Napawanych Warstw na Bazie Kobaltu

Published Online: 17 Oct 2008
Page range: 77 - 83

Abstract

Keywords

  • stopy kobaltu
  • utlenianie
  • zgorzelina
Open Access

Analysis of the Failure of Fixator used in Bone Surgery

Published Online: 17 Oct 2008
Page range: 84 - 88

Abstract

Analysis of the Failure of Fixator used in Bone Surgery

The Gamma nail (fixator) made of stainless steel, which has broken in the body, was subjected to examination. The fixator was removed from the patient femur. The fracture occurred in the area of the nail hole after two months' stay in the organism. The research included chemical composition, hardness of the Gamma nail material and the observation and analysis of the type of fracture. The research showed the fatigue failure of the Gamma nail.

Keywords

  • Gamma nail
  • stainless steel
  • fatigue failure
Open Access

Allergy to Chromium, Nickel, Cobalt and Titanium with Trauma-Orthopedics Patients

Published Online: 17 Oct 2008
Page range: 89 - 93

Abstract

Allergy to Chromium, Nickel, Cobalt and Titanium with Trauma-Orthopedics Patients

The problems concerning re-operations after joint implantation, as well as the occurrence of postoperation complications with trauma-orthopedics patients, who were given metal implants are constantly considered from medical and economical point of view. The most frequent reason for the re-operation is so called: aseptic loosening arthroplasty. The article presents the analysis of various clinical postoperation complications after the long-bone treatment by means of osteosynthesis with the use of metal implants and hip arthroplasty.

Keywords

  • allergy
  • metal implants
Open Access

Surface Cracking of Laser Melted Ti-6Al-4V Alloy

Published Online: 17 Oct 2008
Page range: 94 - 102

Abstract

Surface Cracking of Laser Melted Ti-6Al-4V Alloy

The characteristic features of surface cracking observed after laser melting with CO2 and Nd:YAG laser were described. The cracks were always present, their length approaching some part of melted zone and scarcely dependent on laser melting conditions. The appearance of cracks was attributed mainly to martensitic transformation within the surface layer. The possible contribution of developed thermal stresses cannot be also excluded. The existence of cracks may be utilized for the enhancement of bone - implant strength.

Keywords

  • cracking
  • laser treatment
  • titanium alloys
Open Access

The Experimental Verification of the Numerical Model for Cracked Beam Incorporating Measurement Uncertainty

Published Online: 17 Oct 2008
Page range: 103 - 109

Abstract

The Experimental Verification of the Numerical Model for Cracked Beam Incorporating Measurement Uncertainty

This paper presents verification of the numerical model of a cracked beam against the experimental results. Presented investigation assesses the adequacy of a crack model incorporated in the ABAQUS commercial FEM package. Structure under investigation is a square hollow steel section. Experimental and numerical modal model parameters like mode shapes and natural frequencies were compared. Obtained results confirm the high level of confidence for the numerical model of the crack. This observation constitutes application of crack model in the computations of more complex structures.

Keywords

  • Modal analysis
  • Finite Element Method
  • experimental verification
  • measurement uncertainty
14 Articles
Open Access

Identyfikacja Obiektu Wibroakustycznego za Pomocą Modeli Nieparametrycznych

Published Online: 17 Oct 2008
Page range: 5 - 11

Abstract

Keywords

  • transmitancja
  • gęstość widmowa
  • funkcja korelacji
Open Access

Genetyczne Wspomaganie Konstrukcji Rozdrabniaczy Wielotarczowych

Published Online: 17 Oct 2008
Page range: 12 - 19

Abstract

Keywords

  • wspomaganie konstrukcji rozdrabniaczy
  • algorytmy genetyczne
Open Access

Zastosowanie Metody Nakładania Obrazów do Oceny Mikronierówności Powierzchi W Ruchu

Published Online: 17 Oct 2008
Page range: 20 - 27

Abstract

Keywords

  • metoda nakładania obrazów
  • chropowatość powierzchni
  • ruch powierzchni
Open Access

Zastosowanie Skaterometrii Laserowej I Analizy Obrazu do Oceny Mikronierówności Powierzchni Regenerowanych Przez Napawanie Laserowe I Plazmowe

Published Online: 17 Oct 2008
Page range: 28 - 35

Abstract

Keywords

  • skaterometrii laserowa
  • analiza obrazu
  • chropowatość powierzchni
  • napawanie laserowe
  • napawanie plazmowe
Open Access

Ocena Mikronierówności Powierzchni Frezowanych Z Zastosowaniem Optycznych Metod Pomiarowych I Analizy Obrazu

Published Online: 17 Oct 2008
Page range: 36 - 43

Abstract

Keywords

  • optyczne metody pomiarowe
  • analiza obrazu
  • chropowatość powierzchni
  • frezowanie
Open Access

Mechanical Surface Treatments for Improving Fatigue Behavior in Titanium Alloys

Published Online: 17 Oct 2008
Page range: 44 - 52

Abstract

Mechanical Surface Treatments for Improving Fatigue Behavior in Titanium Alloys

Mechanical surface treatments such as shot peening or ball-burnishing induce high dislocation densities and residual compressive stresses in near-surface regions. In addition, the surface roughness is changed. Micro-hardness and residual stress-depth profiles are evaluated in Ti-6Al-4V as a function of the Almen intensity being the main process parameter in shot peening. In the finite life regime, residual compressive stresses are shown to drastically increase the fatigue life by retarding crack growth from the surface into the interior. However, in the HCF regime a shift in crack nucleation site occurs from the surface to subsurface regions where residual tensile stresses balance the outer compressive stress field. Therefore, the tensile mean stress sensitivity of the fatigue strength which can largely vary in Ti-6Al-4V needs to be taken into account in order to understand the observed differences in HCF responds to shot peening.

Keywords

  • shot peening
  • residual stresses
  • crack nucleation
  • micro-crack propagation
Open Access

Poprawa Własności Wibroizolacyjnych Siedziska Operatora Maszyny Roboczej Poprzez Aktywne Sterowanie Zawieszeniem

Published Online: 17 Oct 2008
Page range: 53 - 60

Abstract

Keywords

  • system zawieszenia siedziska
  • aktywne sterowanie zawieszeniem
Open Access

Użyteczność Obliczeniowej Mechaniki Spawania W Procesie Kształtowania Technologii

Published Online: 17 Oct 2008
Page range: 61 - 68

Abstract

Keywords

  • spawalność
  • OMS
  • stale
  • modelowanie matematyczne mechanika pękania
Open Access

Weldability of Titanium and its Alloys - Progress in Joining

Published Online: 17 Oct 2008
Page range: 69 - 76

Abstract

Weldability of Titanium and its Alloys - Progress in Joining

The weldability aspects of the some advances materials, such as Titanium and its alloys: Titanium Aluminide - Intermetallics, still require further research and development. The power beam welding processes are considered in this work since these processes are capable of joining a wide range of new materials of interest in aerospace industry as well as in the many other industrial applications and offer remarkable advantages over conventional fusion welding processes. In this paper have been defined the following questions: - the weldability of Ti and its alloys, a new class of titanium alloys and their weldability, welding metallurgy and processes for joining.

Keywords

  • weldability of Ti and alloys
  • power beam welding
  • joining Ti and its alloys
Open Access

Wpływ Utleniania W Wysokich Temperaturach na Struktury Napawanych Warstw na Bazie Kobaltu

Published Online: 17 Oct 2008
Page range: 77 - 83

Abstract

Keywords

  • stopy kobaltu
  • utlenianie
  • zgorzelina
Open Access

Analysis of the Failure of Fixator used in Bone Surgery

Published Online: 17 Oct 2008
Page range: 84 - 88

Abstract

Analysis of the Failure of Fixator used in Bone Surgery

The Gamma nail (fixator) made of stainless steel, which has broken in the body, was subjected to examination. The fixator was removed from the patient femur. The fracture occurred in the area of the nail hole after two months' stay in the organism. The research included chemical composition, hardness of the Gamma nail material and the observation and analysis of the type of fracture. The research showed the fatigue failure of the Gamma nail.

Keywords

  • Gamma nail
  • stainless steel
  • fatigue failure
Open Access

Allergy to Chromium, Nickel, Cobalt and Titanium with Trauma-Orthopedics Patients

Published Online: 17 Oct 2008
Page range: 89 - 93

Abstract

Allergy to Chromium, Nickel, Cobalt and Titanium with Trauma-Orthopedics Patients

The problems concerning re-operations after joint implantation, as well as the occurrence of postoperation complications with trauma-orthopedics patients, who were given metal implants are constantly considered from medical and economical point of view. The most frequent reason for the re-operation is so called: aseptic loosening arthroplasty. The article presents the analysis of various clinical postoperation complications after the long-bone treatment by means of osteosynthesis with the use of metal implants and hip arthroplasty.

Keywords

  • allergy
  • metal implants
Open Access

Surface Cracking of Laser Melted Ti-6Al-4V Alloy

Published Online: 17 Oct 2008
Page range: 94 - 102

Abstract

Surface Cracking of Laser Melted Ti-6Al-4V Alloy

The characteristic features of surface cracking observed after laser melting with CO2 and Nd:YAG laser were described. The cracks were always present, their length approaching some part of melted zone and scarcely dependent on laser melting conditions. The appearance of cracks was attributed mainly to martensitic transformation within the surface layer. The possible contribution of developed thermal stresses cannot be also excluded. The existence of cracks may be utilized for the enhancement of bone - implant strength.

Keywords

  • cracking
  • laser treatment
  • titanium alloys
Open Access

The Experimental Verification of the Numerical Model for Cracked Beam Incorporating Measurement Uncertainty

Published Online: 17 Oct 2008
Page range: 103 - 109

Abstract

The Experimental Verification of the Numerical Model for Cracked Beam Incorporating Measurement Uncertainty

This paper presents verification of the numerical model of a cracked beam against the experimental results. Presented investigation assesses the adequacy of a crack model incorporated in the ABAQUS commercial FEM package. Structure under investigation is a square hollow steel section. Experimental and numerical modal model parameters like mode shapes and natural frequencies were compared. Obtained results confirm the high level of confidence for the numerical model of the crack. This observation constitutes application of crack model in the computations of more complex structures.

Keywords

  • Modal analysis
  • Finite Element Method
  • experimental verification
  • measurement uncertainty

Plan your remote conference with Sciendo