Toshiyuki (Toshi) Meshii

Visiting Associate Professor
Cornell University
630 Rhodes Hall
Ithaca, NY 14853-3801
607-254-8822
Fax: 607-254-8888

Education

University of Tokyo
Ph.D., Mechanical Engineering, Mar 1997.

University of Tokyo
M.S., Mechanical Engineering, Mar 1983.

University of Tokyo
B.S., Mechanical Engineering, Mar 1981.

About Toshi

In 1995, Toshi returned to the academia after 12 years career in power generation industry with the Mitsubishi Heavy Industries, LTD. He has developed many low-pressure steam turbine blades in early days as a design engineer and directed development projects such as Single-Casing Reheat Steam Turbine (SRT), large capacity high temperature intercept-valve (ICV) as a senior design engineer. Besides these daily jobs, he has directed many trouble-shooting researches and led them to success. In these urgent trouble-shooting researches, he found out that the critical data or theories were lacking to explain curious phenomena encountered in these troubles. He also became interested in the limits of the theory to explain critical phenomena encountered in these troubles.

So when Toshi decided to go back doctoral course in 1995, he chose 'fatigue crack arrest phenomena under thermal stresses' as his Ph. D. thesis, which he got interested in one of the trouble-shooting projects and tried to explain the phenomena theoretically as possible. He got his Ph. D in 1997 after he derived a closed form stress intensity factor (SIF) for a inner-surface circumferential crack in a thin-walled cylinder subjected to thermal stress and succeeded to explain those cracks will always show crack arrest 'tendency (at least)' through the characteristics of the SIF. He is now trying to verify by experiments whether the crack under cyclic thermal stress will actually arrest or not. In addition, he has started to work on explaining the crack arrest phenomena itself, more elaborately.

Work at Cornell is focused on improving the accuracy of 'extracting' SIF by the FEM results, which he and the Cornell Fracture Group found common interest.

Some Tips Toshi Learned through Trouble-Shooting

• Theoretical is practical
• 70% satisfaction in one day is much better than 100% satisfaction in one week

Toshi hopes students to master these tips before graduating. This is one of the goals Toshi has set to be taught in his classes.

Current Research and Interest

• Fatigue crack arrest phenomena under thermal stress
• Error estimator for SIF extracted from FEM results
• Extending the limits of linear elastic fracture mechanics on fatigue

Activities

• Member, Japan Society of Mechanical Engineers (JSME)
• Member, American Society of Mechanical Engineers (ASME)
• Member, Committee on improving design of nuclear power plant components by applying damage tolerant design, High Pressure Institute of Japan (HPI), 1995-1996
• Member, Committee on improving methods to evaluate structural integrity based on fracture mechanics, HPI, 1997-
• Secretary, Committee on improving methods to evaluate strength and failure of materials, JSME, 1998-

Publications in Journals

1. Meshii, T. and Sakai, S., Fatigue Crack Arrest Problem of Thick-Walled Cylinders under Thermal Stress (1^st Report, Preliminary Study by Single Edge Strip) (in Japanese), Trans. JSME (A), Vol. 63 (1997), No. 606, pp. 275-280.
2. Meshii, T. and Sakai, S., Fatigue Crack Arrest Problem of Thick-Walled Cylinders under Thermal Stress (2nd Report, Comparison of Cylinder with Single Edge Strip) (in Japanese), Trans. JSME (A), Vol. 63 (1997), No. 606, pp. 281-285.
3. Meshii, T. and Watanabe, K., Stress Intensity Factor of Circumferential Crack of Cylinders under Radial Temperature Distribution (in Japanese), Trans. JSME (A), Vol. 63 (1997), No. 610, pp. 1207-1212.
4. Meshii, T. and Watanabe, K., A Simplified Evaluation Method of the Stress Intensity Factor of an Arbitrarily Located Circumferential Crack in a Cylinder Subjected to Axisymmetric Loads (in Japanese), Trans. JSME (A), Vol. 63 (1997), No. 616, pp. 2655-2660.
5. Meshii, T. and Watanabe, K., Simplified Equation to Evaluate the Stress Intensity Factor of an Arbitrarily Located Circumferential Crack in a Finite Length Cylinder under Axisymmetric Bending (in Japanese), Trans. JSME (A), coming up on Vol. 64 (1998), No. 625.
6. Meshii, T. and Watanabe, K., Simplified Equation to Evaluate the Stress Intensity Factor of an Arbitrarily Located Circumferential Crack in a Finite Length Cylinder under Radial Temperature Distribution (in Japanese), Trans. JSME (A), Vol. 64 (1998), No. 620, pp. 912-918.
7. Meshii, T. and Watanabe, K., Characteristics of the Stress Intensity Factor of a Circumferential Crack in a Finite Length Cylinder under Radial Temperature Distribution (in Japanese), Trans. JSME (A), Vol. 64 (1998), No. 623, pp. 1884-1889.
8. Meshii, T. and Watanabe, K., Stress Intensity Factor for a Circumferential Crack in a Finite Length Cylinder under Arbitrarily Distributed Stress on Crack Surfaces by Weight Function Method (in Japanese), Trans. JSME (A), Vol. 64 (1998), No. 621, pp. 1192-1197.
9. Meshii, T. and Watanabe, K., Maximum Stress Intensity Factor for a Circumferential Crack in a Finite Length Cylinder under Transient Radial Temperature Distribution (in Japanese), Trans. JSME (A), Vol. 64 (1998), No. 624, pp. 2164-2170.
10. Meshii, T. and Watanabe, K., Stress Intensity Factor of an Arbitrarily Located Circumferential Crack in a Thin-Walled Cylinder with Axisymmetric Loaded Ends, Engng. Fracture Mech., to be published.
11. Meshii, T. and Watanabe, K., Closed Form Stress Intensity Factor for an Arbitrarily Located Inner Circumferential Surface Crack in a Cylinder Subjected to Axisymmetric Bending Loads, Engng. Fracture Mech., Vol. 59-5 (1998), pp. 589-597.
12. Meshii, T. and Watanabe, K., Closed Form Stress Intensity Factor for an Arbitrarily Located Inner-Surface Circumferential Crack in an Edge-Restraint Cylinder under Linear Radial Temperature Distribution, Engng. Fracture Mech., Vol. 60-5/6 (1998), pp. 523-531.
13. Meshii, T. and Watanabe, K., Stress Intensity Factor Evaluation of a Circumferential Crack in a Finite Length Cylinder Subjected to Arbitrarily Distributed Stress on Crack Surfaces by Weight Function Method, Int. J. Fracture, submitted.
14. Meshii, T. and Watanabe, K., Maximum Stress Intensity Factor for a Circumferential Crack in a Finite Length Thin-Walled Cylinder under Transient Radial Temperature Distribution, Engng. Fracture Mech., submitted.

Conference Proceedings and Others

1. Fujikawa, T., Meshii, T. et al., Operating Experience of EPDC’s Wakamatsu 50MW High-Temperature Turbine STEP II (649/593 C), Proc. of EPRI 3^rd Int. Conf. on Improved Coal-Fired Power Plants , (1991), San Francisco.
2. Fujikawa, T., Meshii, T. et al., Decade of Wakamatsu High-Temperature Turbine Project, Proc. of JSME-ASME International Conference on Power Engineering-93, Vol. 2 (1993), Kawasaki, pp. 71-76.
3. Meshii, T. and Watanabe, K., Stress Intensity Factor of an Arbitrarily Located Circumferential Crack in Axisymmetrically Loaded Cylinders, Proc. of ASME/JSME Joint Pressure Vessels and Piping Conference, Vol. 365 (1998), San Diego, pp.303-309.

4. Fujikawa, T., Meshii, T. et al., Operating Experience of EPDC’s Wakamatsu 50MW High-Temperature Turbine STEP II (in Japanese), Mitsubishi Heavy Industries Technical Report, Vol. 29, No. 3 (1992), pp. 188-192.
5. Fujikawa, T., Meshii, T. et al., Operating Experience of EPDC’s Wakamatsu 50MW High-Temperature Turbine STEP II (in Japanese), Proc. JSME, No. 920-93 (1992), pp. 95-100.
6. Yamamoto, T., Meshii, T. et al., Development of Large Capacity Single Reheat Steam Turbine (in Japanese), Mitsubishi Heavy Industries Technical Report, Vol. 32, No. 1 (1995), pp. 16-19.
7. Meshii, T. and Sakai, S., Fatigue Crack Arrest Problem of Thick Walled Cylinders under Thermal Stress (1^st Report, Preliminary Study by Single Edge Strip) (in Japanese), Proc. 45^th Applied Mech. Japan, (1995), Tokyo, pp. 357-358.
8. Meshii, T. and Sakai, S., Fatigue Crack Arrest Problem of Thick Walled Cylinders under Thermal Stress (2^nd Report, Effect of Thermal Stress Distribution) (in Japanese), Proc. JSME, No. 96-1, Vol. II (1996), Narashino, pp.113-114.
9. Meshii, T. and Sakai, S., Fatigue Crack Arrest Problem of Thick Walled Cylinders under Thermal Stress (3^rd Report, Modeling Circumferential Crack of Thick Walled Cylinders by Single Edge Cracked Strip) (in Japanese), Proc. JSME, No. 96-1, Vol. II (1996), Narashino , pp. 115-116.
10. Meshii, T., Watanabe, K. and Sakai, S., Fatigue Crack Arrest Problem of Thick Walled Cylinders under Thermal Stress (4^th Report, Crack Propagation Characteristics of Cylinders under Arbitrarily Thermal Stress) (in Japanese), Proc. JSME, No. 96-10, Vol. A (1996), Mie, pp. 373-374.
11. Meshii, T., Watanabe, K. and Sakai, S., Fatigue Crack Arrest Problem of Thick Walled Cylinders under Thermal Stress (5^th Report, Crack Length at Practical Arrest Point) (in Japanese), Proc. JSME, No. 96-10, Vol. A (1996), Mie, pp.375-376.

(Last updated 9/21/1998)