Zobrazeno 1 - 10
of 31
pro vyhledávání: '"Theodore F. Johnson"'
Autor:
Theodore F. Johnson, Michael F. Card
Publikováno v:
Journal of Spacecraft and Rockets. 46:203-209
A study of combined thermal andmechanical buckling of stiffened cylindrical shells using the structural geometry of a preliminary supersonic transport fuselage design from 1970 is presented. The buckling analysis is performed using BOSOR4, a nonlinea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::7e3c60708c5fe5a996e3d61017c35aed
https://doi.org/10.2514/1.24575
https://doi.org/10.2514/1.24575
Publikováno v:
Journal of Aircraft. 45:1969-1975
combined loads. It is a common practice to repeat the element tests and then select the lowest test result as a conservative estimate of the mean failure stress. Thispractice is equivalent to reducing the average test failure stress by a knockdown fa
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::39f85018f97e79eb6b7e67ea94326705
https://doi.org/10.2514/1.35551
https://doi.org/10.2514/1.35551
Publikováno v:
Journal of Mechanical Design. 129:266-274
Inspired by work on allocating risk between the different components of a system for a minimal cost, we explore the optimal allocation of uncertainty in a single component. The tradeoffs of uncertainty reduction measures on the weight of structures d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::6fd467ea6429b7b7e25fcec619d801f9
https://doi.org/10.1115/1.2406097
https://doi.org/10.1115/1.2406097
Publikováno v:
International Journal for Numerical Methods in Engineering. 57:1351-1380
Preliminary sizing of structural components in the conceptual design phase of new aerospace vehicles requires a large number of structural optimizations. Use of detailed finite element models for global optimization of stiffened shell structures is n
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aeb485328b5fb9b14a97bf958fded75d
https://doi.org/10.1002/nme.781
https://doi.org/10.1002/nme.781
Publikováno v:
AIAA Journal. 39:296-302
Sublaminates are often used in design optimization to reduce the complexity of the design task, to simplify modeling, to reduce data input to analytical models, and to provide confidence in failure prediction. Sublaminates selected for design often u
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::7c2fbdb3e1849df3d817b5d462412a9c
https://doi.org/10.2514/3.14730
https://doi.org/10.2514/3.14730
Publikováno v:
Journal of Sandwich Structures and Materials. 2:246-269
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::a15812a2bf595cccb633c4e9ff0ad417
https://doi.org/10.1106/mctx-3knp-vrud-yb5e
https://doi.org/10.1106/mctx-3knp-vrud-yb5e
Publikováno v:
Journal of Sandwich Structures & Materials. 2:246-269
Results concerning the linear and nonlinear static response of curved sandwich panels to combined mechanical loads are addressed, and in this context, the implications of elastically tailored face-sheets upon the enhancement of their load carrying ca
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::653b5acfe780a39a98cc533e6727bbe3
https://doi.org/10.1177/109963620000200305
https://doi.org/10.1177/109963620000200305
Publikováno v:
Journal of Spacecraft and Rockets. 37:331-341
Astudy oftheeffectofanisotropyoffacesheetsonbuckling andpostbuckling ofsandwiche atpanelssubjected to both mechanical and thermal loads is presented. Themechanical loadsconsist of uniaxial compressive/tensile edge loads, while the temperature is assu
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::702e7fc9840ebb46409beb7616069cd5
https://doi.org/10.2514/2.3583
https://doi.org/10.2514/2.3583
Autor:
Yoshiaki Echigo, Theodore F. Johnson, Brian W. Grimsley, Terry L. St. Clair, Hisayasu Kaneshiro, Erik S. Weiser
Publikováno v:
High Performance Polymers. 12:1-12
Due to a demand by the aerospace industry, NASA has begun developing the next generation of polyimide foams which could be utilized to reduce vehicle weight for the X-33 and Reusable Launch Vehicle (RLV) programmes. The activity at NASA Langley Resea
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::b728df97b210de7fd189fef9025f2d57
https://doi.org/10.1088/0954-0083/12/1/301
https://doi.org/10.1088/0954-0083/12/1/301
Publikováno v:
Journal of Thermal Stresses. 21:627-653
The study of the nonlinear response of sandwich flat panels exposed to thermomechanical loading systems is the topic of this article. The sandwich structure considered in this article consists of a thick core layer bonded by the face layers, which ar
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::fe05c87d0c798096b51abea2c1416ff8
https://doi.org/10.1080/01495739808956166
https://doi.org/10.1080/01495739808956166