ΔΗΜΟΣΙΕΥΣΕΙΣ
ΔΗΜΟΣΙΕΥΣΕΙΣ ΕΠΙΣΤΗΜΟΝΙΚΩΝ ΕΡΓΑΣΙΩΝ
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Doctor of Philosophy (Ph.D), Materials Science and Engineering department, University of California, Los Angeles, California, USA, 1988. Ph.D title: "Elasto-plastic Analysis of Unidirectional Fiber-Reinforced Composites Subjected to Transverse Normal Loading Using the Nonlinear Finite Element Method" (Η ανάλυση της ελαστο-πλαστικής συμπεριφοράς μεταλλικού σύνθετου υλικού ενισχυμένου με ίνες κατά μία διεύθυνση, φορτιζόμενου με εγκάρσιο φορτίο, με την χρήση της μη γραμμικής θεωρίας των πεπερασμένων στοιχείων).
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Master of Science, Engineering Mechanics and Science Department, The Pennsylvania State University, University Park, State College, Pennsylvania, USA, 1982. Master Thesis title: "Optimization of Thin Shell Structures by the Finite Element Method" (Η βελτιστοποίηση λεπτότοιχων κελυφωτών κατασκευών με την χρήση των πεπερασμών στοιχείων).
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Δίπλωμα Πολιτικού Μηχανικού, Αριστοτέλειο Πανεπιστήμιο Θεσσαλονίκης, 1978. "Έρευνα για την Οργάνωση της Παραγωγής και Διακίνησης καθώς και Υπολογισμός του Κόστους του Μεταφερόμενου Σκυροδέματος στην Ελλάδα"
- Hinton Μ.J, Kaddour A.S, Soden P.D, "A comparison of the predictive capabilities of current failure theories for composite laminates, judged against experimental evidence". Composite Science and Technology 62 (2002) 1725-1797.
- Hinton M.J, Soden P.D, Kaddour A.S, "Use of current world-wide failure methods in design application". Composite Science and Technology [in press] (www.elsevier.com/locate/compscitech).
ΕΠΙΣΤΗΜΟΝΙΚΟ ΣΥΓΓΡΑΜΜΑ
"Πεπερασμένα Στοιχεία", Π. Κ. Γκότση, εκδόσεις Ζήτη,
Θεσσαλονίκη 2007, 2η εκδοση,
560 σελίδες με 75 παραδείγματα και πολλά σχήματα.
560 σελίδες με 75 παραδείγματα και πολλά σχήματα.
ΔΙΕΘΝΗ ΠΕΡΙΟΔΙΚΑ
J1. "Elasto-plastic Analysis of an Aluminum Alloy Matrix Reinforced with Silicon Carbide Fibers Packed in a Hexagonal Alloy",
P.K. Gotsis, A.H. Shabaik and G.H. Sines.
International Journal of Computers & Structures, 1992, Vol. 41, No.2, pp. 345-353.
International Journal of Computers & Structures, 1992, Vol. 41, No.2, pp. 345-353.
J2. "Elasto-plastic Analysis of an Aluminum Alloy Matrix Reinforced with Silicon Carbide Fibers",
P.K. Gotsis, A.H. Shabaik and G.H. Sines.
International Journal of Computers & Structures. Technical Note, 1992, Vol. 43, No. 4, pp. 795-802.
International Journal of Computers & Structures. Technical Note, 1992, Vol. 43, No. 4, pp. 795-802.
*J3. "Combined Bending and Thermal Fatique of High Temperatures MMC: Computational Simulation",
P.K. Gotsis and C.C. Chamis.
16th Thermomechanical Fatigue (TMF) Workshop, at NASA Lewis Research Center, on June 1991. Full paper presented and published.
International Journal of Damage Mechanics, 1992, Vol. 1, No. 3, pp. 290-319.
16th Thermomechanical Fatigue (TMF) Workshop, at NASA Lewis Research Center, on June 1991. Full paper presented and published.
International Journal of Damage Mechanics, 1992, Vol. 1, No. 3, pp. 290-319.
J4. "Microfracture in High Temperature Metal Matrix Laminates",
S.K. Mital, C.C. Chamis and P.K. Gotsis.
Composite Science and Technology Journal, vol. 50, pp. 59-70, 1994.
Composite Science and Technology Journal, vol. 50, pp. 59-70, 1994.
J5. "Fiber Composite Thin Shell Subjected to Thermal Buckling Loads",
P.K. Gotsis and J.D. Guptill.
International Journal of Computers and Structures, 1994, Vol. 53, No. 6, pp. 1263-1274.
International Journal of Computers and Structures, 1994, Vol. 53, No. 6, pp. 1263-1274.
J6. "Structural Optimization of Shell Structures",
P.K. Gotsis.
International Journal of Computers and Structures, 1994, Vol. 53, No. 4, pp. 1263-1274.
International Journal of Computers and Structures, 1994, Vol. 53, No. 4, pp. 1263-1274.
J7. "Free Vibration of Fiber Composite Thin Shells in a Hot Enivironment",
P.K. Gotsis and J.D. Guptill.
Journal of Reinforced Plastic and Composites, 1995, Vol. 14, pp. 143-163.
Journal of Reinforced Plastic and Composites, 1995, Vol. 14, pp. 143-163.
J8. "Progressive Fracture of Fiber Composite Build-up Structures",
P.K. Gotsis, C.C. Chamis and L. Minnetyan.
Journal of Reinforced Plastics and Composites, vol. 16, No. 2, pp.183-198, 1997.
Journal of Reinforced Plastics and Composites, vol. 16, No. 2, pp.183-198, 1997.
***J9. "Prediction of Composite Laminate Fracture: Micromechanics and Progressive Fracture",
P.K. Gotsis, C.C. Chamis and L. Minnetyan.
Composite Science and Technology Journal 58/7, 1998, p.1137-1149.
Composite Science and Technology Journal 58/7, 1998, p.1137-1149.
J10. "Progressive Fracture of Fiber Composite Thin Shell Structures Under Internal Pressure and Axial Loads",
P.K. Gotsis, C.C. Chamis and L. Minnetyan.
International Journal of Damage Mechanics, vol.7, pp.332-350, October 1998.
International Journal of Damage Mechanics, vol.7, pp.332-350, October 1998.
*J11. "Progressive Fracture of Blade Containment Composite Structures",
P.K. Gotsis, C.C. Chamis and L. Minnetyan.
Journal of Reinforced Plastics and Composites, vol. 16, No. 15, pp. 1407-1424, 1997.
Journal of Reinforced Plastics and Composites, vol. 16, No. 15, pp. 1407-1424, 1997.
J12. "Computational Simulation of the Damage of Composite Thin Shell Structures Subjected to Mechanical Loads",
P.K. Gotsis, C.C. Chamis and L. Minnetyan.
Journal of Theoretical and Applied Fracture Mechanics, 25(1996) 211-224.
Journal of Theoretical and Applied Fracture Mechanics, 25(1996) 211-224.
*J13. "Progressive Fracture and Damage Tolerance of Composite Pressure Vessels",
C.C. Chamis, P.K. Gotsis and L. Minnetyan.
Journal of Advanced Materials, vol. 30, no. 1, pp.22-26, Jan. 1998.
Journal of Advanced Materials, vol. 30, no. 1, pp.22-26, Jan. 1998.
J14. "Progressive Damage and Fracture of Stiffened and Unstiffened Composite Pressure Vessels",
L. Minnetyan, P.K. Gotsis and C.C. Chamis.
Journal of Reinforced Plastics and Composites, vol. 16, No. 18, pp. 1711-1724, 1997.
Journal of Reinforced Plastics and Composites, vol. 16, No. 18, pp. 1711-1724, 1997.
*J15. "Laminate Analogy for Composite Enhanced Concrete Structures",
C. Chamis and P. K. Gotsis
Proceedings of the First Hellenic Conference on Composite Materials and Structures, Xanthi, Greece, July 2-5, 1997, vol.II, pp. 31-50. Invited paper for keynote presentation.
Journal of Advanced Materials, vol. 29, No. 1, pp. 3-10, October 1997.
Proceedings of the First Hellenic Conference on Composite Materials and Structures, Xanthi, Greece, July 2-5, 1997, vol.II, pp. 31-50. Invited paper for keynote presentation.
Journal of Advanced Materials, vol. 29, No. 1, pp. 3-10, October 1997.
J16. "Damage Progression in Bolted Composites",
L. Minnetyan, C. C. Chamis and P. K. Gotsis.
Journal of Thermoplastic Composite Materials, vol. II, pp.231-248, 1998.
Journal of Thermoplastic Composite Materials, vol. II, pp.231-248, 1998.
*J17. "Infrastructure Retrofit Design Via Composite Mechanics",
C. Chamis and P. K. Gotsis.
Journal of Advanced Materials, Vol.31, No. 4, October 1999, pp.33-36.
Journal of Advanced Materials, Vol.31, No. 4, October 1999, pp.33-36.
J18. "Meso-Mechanics and Meso-Structures: A Matter of Scale",
C. Chamis, P. K. Gotsis and S. K. Mital.
Journal of Thermoplastic Composite Materials, vol. 11, No. 5, pp.478-490., Sept. 1998.
Journal of Thermoplastic Composite Materials, vol. 11, No. 5, pp.478-490., Sept. 1998.
**J19. "Telescoping Composite Mechanics for Composite Behavior Simulation",
C. Chamis, P. L. N. Murthy, P. K. Gotsis and S. K. Mital.
Invited article for a special issue of the Computer Methods in Applied Mechanics and Engineering Journal, 185, pp.399-411, 2000.
Invited article for a special issue of the Computer Methods in Applied Mechanics and Engineering Journal, 185, pp.399-411, 2000.
***J20. "Application of progressive fracture analysis for predicting failure envelopes and stress-strain behaviors of composite laminates: a comparison with experimental results",
P. K. Gotsis, C. C. Chamis, L. Minnetyan.
Composites Science and Technology 62 (2002) 1545-1559.
Composites Science and Technology 62 (2002) 1545-1559.
J21. "Application of Composite Mechanics to Composite Enhanced Concrete Structures",
C.C. Chamis and P. K. Gotsis.
International Journal of Advances in Mechanics and Applications of industrial Materials (IJAMAIM) (ISSN 1718-5505). (Advanced Engineering Solutions Technical Reviews), 2007, Vol. 1, Issue 1, pp.41-54.
International Journal of Advances in Mechanics and Applications of industrial Materials (IJAMAIM) (ISSN 1718-5505). (Advanced Engineering Solutions Technical Reviews), 2007, Vol. 1, Issue 1, pp.41-54.
J22. "Progressive Fracture of [0/90/±θ]S Composite Structure Under Uniform Pressure",
P.K. Gotsis, C.C. Chamis, C.K. Gotsis and E. Mouratidis. International Conference on
International Journal of Advances in Mechanics and Applications of industrial Materials (IJAMAIM). (Advanced Engineering Solutions Technical Reviews) (ΙSSN 1718-5505), 1(1) 2008, pp. 77-83.
International Journal of Advances in Mechanics and Applications of industrial Materials (IJAMAIM). (Advanced Engineering Solutions Technical Reviews) (ΙSSN 1718-5505), 1(1) 2008, pp. 77-83.
J23. "Impact fatigue failure modes of HVOF coatings",
C. David, K.G. Anthymidis, M. Athanasiou and P.K. Gotsis.
Journal of ASTM International (JAI), vol.5, No.6, 2008.
Journal of ASTM International (JAI), vol.5, No.6, 2008.
J24. "Progressive Fracture of Laminated Composite Stiffened Plate",
P.K. Gotsis, C.C. Chamis, K. David and F. Abdi.
Journal of Theoretical and Applied Fracture Mechanics, vol.51 (2009) 144-147
Journal of Theoretical and Applied Fracture Mechanics, vol.51 (2009) 144-147
* Σε Διεθνές συνέδριο εχει παρουσιασθεί η πλήρης εργασία.
** Invited article for a special issue of the Computer Methods in Applied Mechanics and Engineering Journal.
*** Οι εργασίες J9 και J20 έγιναν στα πλαίσια μιας Παγκόσμιας Ασκησης για την Θραύση.
Οι Βρετανοί ερευνητές Dr. M.J. Hinton, Dr.A.S. Kaddour and Dr.P. D. Soden , εκλεκτικά προσκάλεσαν τους δημιουργούς των 12 καλύτερων μοντέλων
πρόβλεψης της θραύσης σε σύνθετα υλικά (laminate fiber composite materials). Σκοπός ήταν η μια παγκόσμια άσκηση (World-Wide Failure Exercice)
στην οποία συμμετείχαν οι 12 καλύτερες θεωρίες για την πρόβλεψη θραύσης (failure) σε σύνθετα υλικά (composite laminates) και την σύγκριση αυτών
με πειραματικά δεδομένα.
Ο Dr. Christos C. Chamis και ο Δρ. Πασχάλης Κ. Γκότσης (ερευνητική ομάδα της NASA Glenn (Lewis) Research Center) ήταν μία από τις 12 ομάδες που
προσκάλεσαν οι Βρερτανοί να συμμετέχουν στην διεθνή άσκηση για την ακρίβεια των μοντέλων στην πρόβλεψη της θραύσης των σύνθετων υλικών
(World-Wide Failure Exercice).
Για περισσότερο ενημέρωση υπάρχουν οι δημοσιεύσεις των Εγγλέζων ερευνητών:
ΔΗΜΟΣΙΕΥΣΗ ΣΕ ΔΙΕΘΝΗ ΠΕΡΙΟΔΙΚΟ ΤΗΣ NASA ΜΕ ΤΡΕΙΣ ΚΡΙΤEΣ
ΝΑSA1. "Microfracture in High Temperature Metal Matrix Laminates",
S.K. Mital, C.C. Chamis and P.K. Gotsis.
NASA TM 105189, April 1991.
NASA TM 105189, April 1991.
NASA2. "Metal Matrix Composite Analyzer (METCAN), User's Manual",
H.J. Lee, P.K. Gotsis, P.L.N. Murthy and D.A. Hopkins.
NASA TM 105244, 1992, pages 148.
NASA TM 105244, 1992, pages 148.
NASA3. "High Temperature Composite Analyzer (HITCAN), Theoretical Manual",
J. Lackney, P.L.N. Murthy and P.K. Gotsis.
NASA TM 106001, 1992, pages 58.
J. Lackney, P.L.N. Murthy and P.K. Gotsis.
NASA TM 106001, 1992, pages 58.
NASA4. "High Temperature Composite Analyzer (HITCAN), Programmer's Manual",
J. Lackney, P.L.N. Murthy and P.K. Gotsis.
NASA TM 106004, 1992, pages 132.
J. Lackney, P.L.N. Murthy and P.K. Gotsis.
NASA TM 106004, 1992, pages 132.
NASA5. "High Temperature Composite Analyzer (HITCAN), User's Manual",
J. Lackney, S.N. Singal, P.L.N. Murthy and P.K. Gotsis
NASA TM 106002, 1992, pages 180.
NASA TM 106002, 1992, pages 180.
ΝΑSA6. "Structural Optimization of Shell Structures",
P.K. Gotsis.
NASA TM 105903, 1992.
NASA TM 105903, 1992.
NASA7. "Buckling Analysis of Laminated Thin Shells in a Hot Environment",
P.K. Gotsis and J.D. Guptill.
NASA TM 106302, 1993.
NASA TM 106302, 1993.
NASA8. "Laminated Thin Shell Structures Subjected to Free Vibration in a Hygrothermal Environment",
P.K. Gotsis and J.D. Guptill.
NASA TM 106600, 1994.
NASA TM 106600, 1994.
NASA9. "Progressive Fracture of Fiber Composite Build-up Structures",
P.K. Gotsis, C.C. Chamis and L. Minnetyan.
NASA TM 107231, 1996.
NASA TM 107231, 1996.
NASA10. "Prediction of Composite Laminate Fracture: Micromechanics and Progressive Fracture",
P.K. Gotsis, C.C. Chamis and L. Minnetyan.
NASA TM 107331, 1996.
NASA TM 107331, 1996.
ΝΑSA11. "Progressive Fracture of Fiber Composite Thin Shell Structures Under Internal Pressure and Axial Loads",
P.K. Gotsis, C.C. Chamis and L. Minnetyan.
NASA TM 107234, 1996.
NASA TM 107234, 1996.
NASA12. "Telescoping Mechanics: A New Paradigm for Composite Behavior simulation",
C. Chamis, P. L. N. Murthy, P. K. Gotsis and S. K. Mital.
NASA TM-2004-209317.
NASA TM-2004-209317.
NASA13. "Application of Composite Mechanics to Composite Enhanced Concrete Structures",
C.C. Chamis and P. K. Gotsis.
NASA TM-2006-214038.
NASA TM-2006-214038.
NASA14. "Progressive Fracture of Laminated Composite Stiffened Plate",
P.K. Gotsis, C.C. Chamis, C. David and F. Abdi.
NASA TM-2007-214927.
NASA TM-2007-214927.
ΔΙΕΘΝΗ ΣΥΝΕΔΡΙΑ
CONF1. "Combined Bending and Thermal Fatique of High Temperatures MMC: Computational Simulation",
P.K. Gotsis and C.C. Chamis.
16th Thermomechanical Fatigue (TMF) Workshop, at NASA Lewis Research Center, on June 1991.
16th Thermomechanical Fatigue (TMF) Workshop, at NASA Lewis Research Center, on June 1991.
CONF2. "Effect of Combined Loads on the Durability of a Stiffened Adhesively Bonded Composite Structure",
P.K. Gotsis, C.C. Chamis and L. Minnetyan.
Proceeding of the 36th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, New Orleans, LA, Part 2, pp. 1083-1092, April 10-13, 1995.
Proceeding of the 36th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, New Orleans, LA, Part 2, pp. 1083-1092, April 10-13, 1995.
CONF3. "Progressive Fracture in Adhesively Bonded Concentric Cylinders",
L. Minnetyan and P.K. Gotsis.
Proceedings of the 40th International SAMPE CONFposium and Exhibition, Anaheim, California, Vol. 40, Book 1, pp. 849-860, May 8-11, 1995.
Proceedings of the 40th International SAMPE CONFposium and Exhibition, Anaheim, California, Vol. 40, Book 1, pp. 849-860, May 8-11, 1995.
CONF4. "Computational Simulation of Fiber Composite Thin Shell Structures in a Hygrothermal Environment",
P.K. Gotsis.
Proceedings of the 5th Europe-Japan Bilateral Colloquium on Composite Material, Corfu, Greece, Sept. 18-22, 1995.
Proceedings of the 5th Europe-Japan Bilateral Colloquium on Composite Material, Corfu, Greece, Sept. 18-22, 1995.
CONF5. "Damage Progression in Bolted Composite Structures",
C.C. Chamis, P.K. Gotsis and L. Minnetyan.
Proceedings of the 1995 USAF Structural Integrity Program Conference, 28-30 November 1995, San Antonio, Texas, WL-TR-4094, Vol. II, pp. 663-679, 1996.
Proceedings of the 1995 USAF Structural Integrity Program Conference, 28-30 November 1995, San Antonio, Texas, WL-TR-4094, Vol. II, pp. 663-679, 1996.
CONF6. "Progressive Damage and Fracture of Adhesively Bonded Fiber Composite Pipe Joints",
C.C. Chamis, P.K. Gotsis and L. Minnetyan.
Proceedings of the Conference and Exhibition: CONFposium on Composite Materials Design and Analysis, Houston, Texas, January 29-February 2, 1996. Book V, pp. 401-408, 1996. Sponsored by ASME.
Proceedings of the Conference and Exhibition: CONFposium on Composite Materials Design and Analysis, Houston, Texas, January 29-February 2, 1996. Book V, pp. 401-408, 1996. Sponsored by ASME.
CONF7. "Damage Tolerance of Composite Pressurized Shells",
C.C. Chamis, P.K. Gotsis and L. Minnetyan.
Proceedings of the 37th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, Salt Lake City, Utah, April 15-17, 1996, Part 4, pp. 2112-2121.
Proceedings of the 37th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics and Materials Conference, Salt Lake City, Utah, April 15-17, 1996, Part 4, pp. 2112-2121.
CONF8. "Defect Tolerance of Pressurized Fiber Composite Shell Structures",
P.K. Gotsis, C.C. Chamis and L. Minnetyan.
Proceedings of the 41st International SAMPE CONFposium and Exhibition, Anaheim, California, March 25-28, 1996, Vol. 41, pp. 450-461.
Proceedings of the 41st International SAMPE CONFposium and Exhibition, Anaheim, California, March 25-28, 1996, Vol. 41, pp. 450-461.
CONF9. "Progressive Fracture of Composite Subjected to Iosepescu Shear Test",
L.Minnetyan, D. Huang, C.C. Chamis and P.K. Gotsis.
Proceedings of the ASTM 13th CONFposium on Composite Materials: Testing and Design, Orlando, Florida, May 20-21, 1996.
Proceedings of the ASTM 13th CONFposium on Composite Materials: Testing and Design, Orlando, Florida, May 20-21, 1996.
CONF10. "Infrastructure for Coupled Multidisciplinary Problems in Engine Structures",
C.C. Chamis and P.K. Gotsis.
Conference Proceedings at the AIAA/NASA/USAF Multidisciplinary Analysis & Optimization CONFposium, Sept. 4-6, 1996, Bellevue, Washington. AIAA-96-4147-CP, Part 2, pp. 1409-1418.
Conference Proceedings at the AIAA/NASA/USAF Multidisciplinary Analysis & Optimization CONFposium, Sept. 4-6, 1996, Bellevue, Washington. AIAA-96-4147-CP, Part 2, pp. 1409-1418.
CONF11. "Code Certification Process for Multidisciplinary Analysis/Design Optimization",
R.L. Mcknight, M.S. Hartle, F.E. Sagendorph, P.K. Gotsis and C.C. Chamis
Conference Proceedings at the AIAA/NASA/USAF Multidisciplinary Analysis & Optimization CONFposium, Sept. 4 - 6, 1996, Bellevue, Washington. AIAA-96-4031-CP, Part 1, pp. 448-458.
Conference Proceedings at the AIAA/NASA/USAF Multidisciplinary Analysis & Optimization CONFposium, Sept. 4 - 6, 1996, Bellevue, Washington. AIAA-96-4031-CP, Part 1, pp. 448-458.
CONF12. "Structural Integrity of Composite Containment Structures",
C.C. Chamis, P.K. Gotsis and L. Minnetyan.
Conference Proceedings of the 1996 USAF Structural Integrity Program Conference, Dec. 3-5, 1996, San Antonio, Texas.
Conference Proceedings of the 1996 USAF Structural Integrity Program Conference, Dec. 3-5, 1996, San Antonio, Texas.
CONF13. "Laminate Analogy for Composites Application to Infrastructures",
P.K. Gotsis and C.C. Chamis.
Conference Proceedings at the 42nd International SAMPE CONFposium and Exhibition, Anaheim, California, May 5-8, 1997, pp. 947-956.
Conference Proceedings at the 42nd International SAMPE CONFposium and Exhibition, Anaheim, California, May 5-8, 1997, pp. 947-956.
CONF14. "Progressive Fracture of Blade Containment Composite Structures",
P.K. Gotsis, C.C. Chamis and L. Minnetyan.
Proceedings of the 11th DOP/NASA/FAA Conference on Fibrous Composites in Structural Design, Fort Worth, Texas, August 26-29, 1996.
Proceedings of the 11th DOP/NASA/FAA Conference on Fibrous Composites in Structural Design, Fort Worth, Texas, August 26-29, 1996.
CONF15. "Progressive Fracture and Damage Tolerance of Composite Pressure Vessels",
C.C. Chamis, P.K. Gotsis and L. Minnetyan.
Conference Proceedings at the International Composites EXPO '97 in Nashville, Tennessee, Jan. 27-29, 1997, session 5-C/1 to 8.
Conference Proceedings at the International Composites EXPO '97 in Nashville, Tennessee, Jan. 27-29, 1997, session 5-C/1 to 8.
CONF16. "Laminate Analogy for Composite Enhanced Concrete Structures",
C. Chamis and P. K. Gotsis.
Proceedings of the First Hellenic Conference on Composite Materials and Structures, Xanthi, Greece, July 2-5, 1997, vol.II, pp. 31-50.
Proceedings of the First Hellenic Conference on Composite Materials and Structures, Xanthi, Greece, July 2-5, 1997, vol.II, pp. 31-50.
CONF17. "Infrastructure Retrofit Design Via Composite Mechanics",
C. Chamis and P. K. Gotsis.
Conference Proceedings of the International Composites, EXPO '98 - ICE '98, in Nashville, Tennessee, January 19-21, 1998.
Conference Proceedings of the International Composites, EXPO '98 - ICE '98, in Nashville, Tennessee, January 19-21, 1998.
CONF18. "Computational Simulation of Concrete Structures Enhanced with Fiber Composites",
P. K. Gotsis and C. C. Chamis.
Invited paper for the CONFposium on Materials, Design and Analysis. Energy Resource and Technology Conference, Houston, Texas, February 2-4, 1998.
Invited paper for the CONFposium on Materials, Design and Analysis. Energy Resource and Technology Conference, Houston, Texas, February 2-4, 1998.
CONF19. "Evaluation of Progressive Fracture in Woven and Non-woven Composites Panels",
L. Minnetyan, R. A. Lund, C. C. Chamis and P. K. Gotsis.
Proceedings at the 1997 USAF Aircraft Structural Integrity Program Conference, San Antonio, Texas, December 2- 4, 1997.
Proceedings at the 1997 USAF Aircraft Structural Integrity Program Conference, San Antonio, Texas, December 2- 4, 1997.
CONF20. "Probabilistic Assessment of Fracture in Composite Pressure Vessels",
C. Chamis, P. K. Gotsis and L. Minnetyan.
Conference Proceedings for the 1998 ASME/JSME Pressure Vessels and Piping Conference, San Diego, California, July 26-30, 1998.
Conference Proceedings for the 1998 ASME/JSME Pressure Vessels and Piping Conference, San Diego, California, July 26-30, 1998.
CONF21. "Simulation of Ball End Tools Milling",
N. Vidakis, A. Antoniadis, C. Savakis and P. K. Gotsis.
The 16th Conference on Production Research ICPR-16, on 29 July - 3 August 2001, Praha, Czech Republic.
The 16th Conference on Production Research ICPR-16, on 29 July - 3 August 2001, Praha, Czech Republic.
CONF22. "Progressive Fracture of Laminated Composite Stiffened Plate",,
P.K. Gotsis, C.C. Chamis, K. David and F. Abdi.
9th Conference on Mesomechanics (MESO2007), Presquile de Giens, France, May 13-17, 2007.
9th Conference on Mesomechanics (MESO2007), Presquile de Giens, France, May 13-17, 2007.
CONF23. "Progressive Fracture of [0/90/±θ]S Composite Structure Under Uniform Pressure",
P.K. Gotsis, C.C. Chamis, C.K. Gotsis and E. Mouratidis.
International Conference on Advances and Trends of engineering Materials and their Applications (ATEMA2007), Montreal, Canada, August 6-10, 2007.
International Conference on Advances and Trends of engineering Materials and their Applications (ATEMA2007), Montreal, Canada, August 6-10, 2007.
CONF24. "Progressive Fracture of Laminated Fiber-Reinforced Composite Stiffened Plate Under Pressure",
P.K. Gotsis, C.C. Chamis, F. Abdi and K. Tsouros.
COMP-07: 6th International Symposium on Advanced Composite Technologies. Corfu, Greece, 16-18 May 2007.
COMP-07: 6th International Symposium on Advanced Composite Technologies. Corfu, Greece, 16-18 May 2007.
CONF25. "Damage Progression of (0/90/45)S Laminated Fiber-Reinforced Composite Stiffened Plate Under Mechanical Loads",
P.K. Gotsis, C.C. Chamis, K. Tsouros and K. David.
8th HSTAM International Congress on Mechanics, Patras, Greece, July 12-14, 2007.
8th HSTAM International Congress on Mechanics, Patras, Greece, July 12-14, 2007.
CONF26. "Impact Fatigue investigation of HVOF coatings",
C.N. David, M. Athanasiou, K. Anthimidis and P.K. Gotsis.
36th ASTM National Symposium on Fatigue and Fracture Mechanics Tampa Marriot Waterside, Tampa, Florida, USA, November 14-16, 2007.
36th ASTM National Symposium on Fatigue and Fracture Mechanics Tampa Marriot Waterside, Tampa, Florida, USA, November 14-16, 2007.
CONF27. "Damage Progression of Sandwich Plate Due to the Residual Stresses and Thermo-mechanical Loads",
P. K. Gotsis.
International Conference MESOMECHANICS 2008, 28 January 2008 to 1 February 2008 Cairo, Egypt.
International Conference MESOMECHANICS 2008, 28 January 2008 to 1 February 2008 Cairo, Egypt.
CONF28. "Composite multiscale mechanics for composite enhanced concrete structures"
7th World Conference on Earthquake Resistant Engineering Stuctures, VII 395-407, 2009.
7th World Conference on Earthquake Resistant Engineering Stuctures, VII 395-407, 2009.
ΠΑΡΟΥΣΙΑΣΗ ΣΕ ΣΥΝEΔΡΙA
PRES1. "Formal Methods to Design Composite Shells for Robustness and Affordability" ,
P. K. Gotsis, C. C. Chamis, L. Minnetyan and G. H. Abumeri.
6th National Congress of Mechanics, Thessaloniki, Greece, July 19-21, 2001.
6th National Congress of Mechanics, Thessaloniki, Greece, July 19-21, 2001.
To αντικείμενο της εργασίας είναι μοντελοποίηση της μηχανικής και της θραύσης λεπτότοιχων κελυφωτών κατασκευών που αποτελούνται από σύνθετα υλικά (fiber composite
laminate materials). Η έρευνα έγινε με την χρήση των πεπερασμένων στοιχείων σε γλώσσα προγραμματιστού Fortran. Η προσομοίωση έγινε με τα προγράμματα Η/Υ της ΝΑSA τα: CODSTRAN και IPAC.
To IPAC χρησιμοποιεί την θεωρία των πιθανοτήτων και χρησιμοποιεί ως παραμέτρους (design variables) τις μηχανικές ιδιότητες των ινών και του μέσου (matrix) καθώς και το ποσοστό των ινών στο μέσον (fiber volume ratio).
PRES2. "CSTEM: Coupled Structural, Thermal, Electromagnetic, Acoustic and Tailoring",
P.K. Gotsis.
First NASA Lewis Multidisciplinary Design Optimization Workshop, (Vol. 1 of 3), Ohio Aerospace Institute, Cleveland, Ohio, Febraury 21, 1995.
First NASA Lewis Multidisciplinary Design Optimization Workshop, (Vol. 1 of 3), Ohio Aerospace Institute, Cleveland, Ohio, Febraury 21, 1995.
To αντικείμενο της εργασίας είναι η βελτιστοποίηση (structural optimization) των διαφόρων χαρακτηριστικών (βάρος, κόστος, φυσική συχνότητα και θόρυβος) πτερυγίου στροβιλομηχανής το οποίο αποτελείται
από σύνθετα υλικά (fiber composite laminate materials) και φορτίζεται συγχρόνως με μηχανικά, θερμικά και ακουστικά φορτία. Η έρευνα έγινε με την χρήση των πεπερασμένων στοιχείων σε γλώσσα προγραμματιστού Fortran.
Η μοντελοποίηση έγινε με το πρόγραμμα Η/Υ CSTEM.
Ιndustrial Report for TRW Aerospace Company in Los Angeles, California, USA, 1990. "Mathematical Models for Predicting Curing Deformation of L-Shaped Composites",
J. Plecnic, P.K. Gotsis, O.E. Henriquez and A. Pugal.
California State Universtity, Long Beach, California, USA.
California State Universtity, Long Beach, California, USA.
To αντικείμενο της εργασίας είναι η ανάπτυξη ενός προγράμματος Η/Υ σε γλώσσα προγραμματισμού BASIC, για την απόψυξη βιομηχανικού προιόντος σχήματος, L το οποίο αποτελείται από σύνθετα υλικά fiber composite
laminate materials. Σκοπός ήταν να προβλέψουμε τις τάσεις και τις παραμορφώσεις. Τα αποτελέσματα του μαθηματικού μοντέλου συγκρίθηκαν με τα διαθέσιμα πειραματικά δεδομένα (της αεροπορικής εταιρείας TRW) καισυμφωνούσαν.
H εταιρεία TRW με υπεύθυνο τον Dr. John Goodman χρηματοδότησε το ερευνητικό πρόγραμμα στο οποίο ήμουν ο υπεύθυνος και δημιούργησα που το πρόγραμμα για τον Η/Υ σε γλώσσα προγραμματισμού BASIC.