THERMOMECHANICALLY INDUCED WEAR AT HIGH SLIP RATE INTERFACES BETWEEN DEFORMING COMPOSITE MEDIA: PART 1, PROBLEM FORMULATION
Titel:
THERMOMECHANICALLY INDUCED WEAR AT HIGH SLIP RATE INTERFACES BETWEEN DEFORMING COMPOSITE MEDIA: PART 1, PROBLEM FORMULATION
Auteur:
Padovan, Joe
Verschenen in:
Journal of thermal stresses
Paginering:
Jaargang 16 (1993) nr. 4 pagina's 351-372
Jaar:
1993-10-01
Inhoud:
This series of articles develops a methodology for simulating the thermo/mechanically/ chemically dominated wear process in very high slip rate (90 M/sec) interfaces between heavily loaded deformable elastomeric composite media. Such interface problems include tire braking, spinup, etc. For example, the landing of the shuttle, the projected space plane, and various other commercial and military aircraft involve spinup wherein an almost explosive thermo/mechanically/chemically induced wear occurs. This is the result of very high energy transfer rates, i.e., 4K watts/ cm2. The central features of the wear simulation include the handling of heat conduction in highly mechanically deformed elastomeric composites and the rapid thermally induced phase change, chemical degradation, and loss of strength. Part I develops the requisite analytical formulation, i.e. a new convected Lagrange-Fourier heat conduction law along with the associated boundary conditions and wear criteria. In Part II, due to the strongly local nature of the severe gradients, a computationally efficient telescoping mesh enrichment scheme is used to simulate the fast moving wear interface. The resulting model is benchmarked against experimental data in a series of parametric studies. These illustrate its accuracy and efficiency.
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