Applied Mechanics Commons^™

Brittle Composites Modeling: Compazisons With Mosi2/Zro2, S.P. Chen, Richard Alan Lesar, A. D. Rollett

Richard Alan Lesar

We have calculated the mechanical properties of brittle composites with spring-network (SN) model. The composites that we studied involve the transformation toughening effects and the accompanying micro-cracking. Our simulation results are consistent with experiments of MoSi2 toughened with ZrO2. By monitoring the stress changes due to the transformation and micro-cracking we are able to separate, for the first time, the contributions from these two competing effects. We also found that the fracture toughness of the composite increases as the modulus, interfacial cohesion of particle increases.

Minutes Of Tractor Test Museum Committee October 21, 1993, Tractor Museum

Lester F. Larsen Tractor Museum: Planning and Development Documents

Status of using tractor test building. Organizing Friends of the Tractor Test Museum

Notes From Museum Committee Meeting October, 1993, Tractor Museum

Lester F. Larsen Tractor Museum: Planning and Development Documents

No abstract provided.

Minutes Tractor Test And Power Museum April 14th, 1993, Tractor Museum

Lester F. Larsen Tractor Museum: Planning and Development Documents

Use of tractor test building for museum.

Fred Chase Preliminary Outline For Tractor Test Museum, Tractor Museum

Lester F. Larsen Tractor Museum: Planning and Development Documents

No abstract provided.

The Influence Of Reynolds Number And Atmospheric Effects On Aircraft Wake Vortices Near The Ground, Zhongquan Charlie Zheng

Mechanical & Aerospace Engineering Theses & Dissertations

Aircraft wakes represent potential hazards which can control aircraft spacing and thus limit airport capacity. Wake vortex trajectories and strengths are altered radically by interactions with the ground plane and by atmospheric conditions. This work has been concerned with developing more accurate numerical predictions. A two-dimensional, unsteady numerical-theoretical study is presented which has included viscous effects, the influence of stratification, crosswind and turbulence on vortex behavior near the ground plane, using a vorticity-streamfunction formulation.

A two-parameter perturbation procedure has been developed which uses analytic solutions for the initial flow field to accommodate the ground effect region in the numerical simulation. …

Formal Recognition Of Museum Committee 1993, Tractor Museum

Lester F. Larsen Tractor Museum: Planning and Development Documents

Recognition of Museum

Preliminary Outline For Preservation Of Tractor Test Building, Tractor Museum

Lester F. Larsen Tractor Museum: Planning and Development Documents

Outline of preliminary plan for the Preservation of the Tractor Test Building and early test equipment as monument to early days of the modern power farming industry.

Minutes Of Ag Tractor Test And Power Museum January 12th, 1993, Tractor Museum

Lester F. Larsen Tractor Museum: Planning and Development Documents

No abstract provided.

Soil Sampling Made Easier, Mike Bolland, Mike Baker

Journal of the Department of Agriculture, Western Australia, Series 4

A new rotary blade soil sampler has taken the hard work out of collecting soil samples from Western Australia's hard-setting soils to test for soil phosphorus levels .

Conceived and developed by Department of Agriculture technical officer Mike Baker, it should enable soil testing to be more widely adopted. Fortunately, the soil calibration tests that were developed using pogo samples can also be used for the new sampler.

Outline For Tractor Testing Farm Machinery Museum, Tractor Museum

Lester F. Larsen Tractor Museum: Planning and Development Documents

General statement for developing a museum, justification, current groups, building considerations, and tractor test museum committee

Tractors Acquired For A Museum, Tractor Museum

Lester F. Larsen Tractor Museum: Planning and Development Documents

Report mentioning major developments illustracted on tractor acquired for a museum.