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All Journal Jurnal Rekayasa Mesin Conference SENATIK STT Adisutjipto Yogyakarta Angkasa: Jurnal Ilmiah Bidang Teknologi
Hendrix Noviyanto Firmansyah, Hendrix Noviyanto
Sekolah Tinggi Teknologi Adisutjipto
Aerospace Engineering Computer Science & IT Electrical & Electronics Engineering Industrial & Manufacturing Engineering Mechanical Engineering

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Journal : Conference SENATIK STT Adisutjipto Yogyakarta

 1 
Estimasi Nilai Faktor Intensitas Tegangan (KI) Tipe Center Crack Dengan Metode Numerik Firmansyah, Hendrix Noviyanto
SENATIK STT Adisutjipto Vol 2 (2016): Peran Teknologi dan Kedirgantaraan Untuk Meningkatkan Daya Saing Bangsa
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (265.43 KB) | DOI: 10.28989/senatik.v2i0.33

Abstract

Crack on a structure will lead to hazard if it’s ignored, because It’s causing singularity to the tip of the cracked structure where the stress tend to infinity. Stress Intensity Factors(SIF) will determine the behaviour of the cracked structure, and it have have to figure it out. Many methods can estimate or predict the values of the SIF according to the crack mode and the crack types. Numerical mothod such as displacement extrapolation and Virtual crack closure technique is one of those method. Method of displacement extrapolation and VCCT in this research will estimate the value of the KI (SIF)of the mode I (opening mode) center type crack. Modelling and analyzing in a FEM based software is needed to accuire datas to calculate the KI. Nodal displacement and nodal force are those datas. Result shows that the displacement extrapolation method have small eror to the value of KI than the VCCT. Displacement extrapolation method also give simple calculaton than the VCCT. In order for VCCT method to be acurate, remeshing model is needed. 
Predicting Stress Intensity Factor (KI) of Single Edge Crack Using Displacement Extrapolation Method Firmansyah, Hendrix Noviyanto
SENATIK STT Adisutjipto Vol 4 (2018): Transformasi Teknologi untuk Mendukung Ketahanan Nasional [ ISBN 978-602-52742-0-6 ]
Publisher : Sekolah Tinggi Teknologi Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (228.572 KB) | DOI: 10.28989/senatik.v4i0.257

Abstract

Cracks that occur in the structure will be very dangerous if left alone. Cracks can propagate and will eventually cause the structure to fail. Cracks that occur will cause singularity at the end of the crack, and the stress level is very high or reaches without limit (infinity). Stress intensity factor (SIF) is used to determine behavior of structures with crack. One of method that can predict SIF is displacement extrapolation method. Displacement extrapolation methods predict SIF by nodal displacement near end of crack. This research is to predict SIF of a thin plate with a single edge crack of 1.27 mm. The crack mode used in this research is mode I (opening mode) with a tension stress of 60 MPa. Nodal displacement for calculating SIF is taken from result of analyzing the cracked model using Patran / nastran. SIF prediction result from displacement extrapolation then to be compared with the results of analytical calculation.
Predicting Stress Intensity Factor (KI) of Single Edge Crack Using Displacement Extrapolation Method Hendrix Noviyanto Firmansyah
SENATIK STT Adisutjipto Vol 4 (2018): Transformasi Teknologi untuk Mendukung Ketahanan Nasional [ ISBN 978-602-52742-0-6 ]
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/senatik.v4i0.257

Abstract

Cracks that occur in the structure will be very dangerous if left alone. Cracks can propagate and will eventually cause the structure to fail. Cracks that occur will cause singularity at the end of the crack, and the stress level is very high or reaches without limit (infinity). Stress intensity factor (SIF) is used to determine behavior of structures with crack. One of method that can predict SIF is displacement extrapolation method. Displacement extrapolation methods predict SIF by nodal displacement near end of crack. This research is to predict SIF of a thin plate with a single edge crack of 1.27 mm. The crack mode used in this research is mode I (opening mode) with a tension stress of 60 MPa. Nodal displacement for calculating SIF is taken from result of analyzing the cracked model using Patran / nastran. SIF prediction result from displacement extrapolation then to be compared with the results of analytical calculation.
Estimasi Nilai Faktor Intensitas Tegangan (KI) Tipe Center Crack Dengan Metode Numerik Hendrix Noviyanto Firmansyah
SENATIK STT Adisutjipto Vol 2 (2016): Peran Teknologi dan Kedirgantaraan Untuk Meningkatkan Daya Saing Bangsa
Publisher : Institut Teknologi Dirgantara Adisutjipto

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.28989/senatik.v2i0.33

Abstract

Crack on a structure will lead to hazard if it’s ignored, because It’s causing singularity to the tip of the cracked structure where the stress tend to infinity. Stress Intensity Factors(SIF) will determine the behaviour of the cracked structure, and it have have to figure it out. Many methods can estimate or predict the values of the SIF according to the crack mode and the crack types. Numerical mothod such as displacement extrapolation and Virtual crack closure technique is one of those method. Method of displacement extrapolation and VCCT in this research will estimate the value of the KI (SIF)of the mode I (opening mode) center type crack. Modelling and analyzing in a FEM based software is needed to accuire datas to calculate the KI. Nodal displacement and nodal force are those datas. Result shows that the displacement extrapolation method have small eror to the value of KI than the VCCT. Displacement extrapolation method also give simple calculaton than the VCCT. In order for VCCT method to be acurate, remeshing model is needed. 
Co-Authors Ayub Budhi Anggoro, Ayub Budhi Mohammad Ardi Cahyono Mohammad Ardi Cahyono, Mohammad Ardi Safriana, Eni sudarmanto, Sudarmanto sudarmanto