Nonlinear finite-element analysis to predict fan-blade damage due tosoft-body impact

Autor:	N. F. Martin
Rok vydání:	1990
Předmět:	Physics Projectile Mechanical Engineering Constitutive equation Aerospace Engineering Mechanics Finite element method Nonlinear system Fuel Technology Space and Planetary Science Inviscid flow Compressibility Direct integration of a beam Numerical stability
Zdroj:	Journal of Propulsion and Power. 6:445-450
ISSN:	1533-3876 0748-4658
DOI:	10.2514/3.25455
Popis:	A transient, material and geometric nonlinear, finite-element-based impact analysis, PW/WHAM, is presented. PW/WHAM couples the WHAM program, a transient geometric and material nonlinear plate finiteelement analysis, a fluid finite-element projectile, and contact algorithms to form an advanced numerical tool used to predict impact damage on structural components. The impacted component is modeled via WHAM plate finite elements while the impactor may be modeled with WHAM elements (hard-body impact) or fluid finite elements (soft-body impact). The direct integration time marching solution uses the explicit form of the Newmark B-Method difference equations. The spherically shaped fluid finite elements, utilizing a compressible nonlinear fluid constitutive law, are assembled in a closest-packed formation producing the soft-body impactor shape. General contact algorithms continualy track the bird/structure interaction eliminating the need for empirical tracking corrections. Several examples demonstrate the excellent correlation with test experience.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::37b8d116633c0101a65bc084fe57d1f9 https://doi.org/10.2514/3.25455 Zobrazit plný text záznamu