KTMM Seminar:Impact Performance Evaluation of Structures under ...
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26 Ekim Çarşamba 13:40-14:30 saatleri arasında Teknopark Kompozit Araştırma Merkezinde Murat Büyük,Impact Performance Evaluation of Structures under Different States-of-Stress başlıklı seminer verecektir.

Aşağıdaki doodle linki üzerinden seminere katılım durumunuzu 25 Ekim 2016 Salı  günü  saat 16:00'a kadar bildirmenizi rica ederim. Katılımcı sayısına göre araç ayarlanacaktır.

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Sabancı Üniversitesi -Teknopark Gidiş 

Araç Hareket Saati : 13:10
Araç Hareket Alanı : Sunum Binası Önü 

Teknopark- Sabancı Üniversitesi 

Araç Hareket Saati : 15:00

Araç Hareket Alanı : KTMM Binası Önü

 

Speaker:         Murat BUYUK, PhD         

Title:                Impact Performance Evaluation of Structures under Different States-of-Stress

Date/Time:      Wednesday, October 26, 2016  13:40 – 14:30

Place:             Teknopark- KTMM

Synopsis:

Dynamic behavior of materials is the key factor to assess the impact performance and crashworthiness evaluation of structures under different threats. In this presentation, numerical modeling strategies for structures under impact at velocities all the way from 10 km/h to 10 km/s, which includes vehicles impacting each other or a roadside barrier, terminal ballistic applications, jet engine fragment containment and hypervelocity impacts on Whipple shield are revisited. It is shown that the impact characteristics of sheet metals around the ballistic limit are prone to change with impact speed, material thickness, and shape and orientation of the impacting object, which indicates that the failure depends profoundly on the state-of-stress. It is found that existing material models are not always successful enough to cover the whole range of failure locus and predict the failure precisely; therefore, a new tabulated thermo-visco-plastic material model with regularized failure is introduced for structures under impact loading, which is specifically developed to cover a large extent of the failure locus as a function of state-of-stress, strain-rate and temperature. Material characterization efforts and validation tests are summarized and it is shown that the new material model is capable of predicting failure accurately around the ballistic limit.

Biograph:

Dr. Murat BUYUK holds a Ph.D. degree from The George Washington University. He worked as a research scientist at the National Crash Analysis Center (NCAC) and directed several research projects funded by NASA, FAA, NHTSA and FHWA. He received his B.Sc. degree in Mechanical Engineering from Yıldız Technical University and his M.Sc. degree in Design and Manufacturing Engineering from Gebze Institute of Technology. His areas of interest can be listed as; computational mechanics, dynamic behavior of materials, material modeling and characterization, numerical modeling of structures under shock and impact loading, transportation safety and security, and optimization.