ICES2008-1675 ADDRESSING CAM WEAR AND FOLLOWER JUMP IN SINGLE-DWELL CAM-FOLLOWER SYSTEMS WITH AN ADJUSTABLE MODIFIED TRAPEZOIDAL ACCELERATION CAM PROFILE

ABSTRACT Presented is a modified trapezoidal cam profile with adjustable forward and backward acceleration. The profile is suitable for single-dwell cam and follower applications. The main benefit of the profile is that it allows cam designers to choose easily a value for the maximum forward or maximum backward acceleration to achieve design objectives. An additional benefit of the profile is that it has a continuous jerk curve. Follower acceleration is one of the primary factors affecting cam wear and follower jump, two main concerns of cam designers. Large forward acceleration against a load creates cam-follower interface forces that can cause excessive wear. Backward acceleration tends to reduce the cam-follower interface force, and if the backward acceleration is sufficiently large, separation between the cam and follower ("follower jump") can occur. The cam profile presented in this paper gives cam designers an easy way to adjust the maximum forward or backward acceleration to prevent these problems

My Small Town Girl

Portrait of Mildred Walker; Background of trees and landscape during duskhttps://scholarsjunction.msstate.edu/cht-sheet-music/9320/thumbnail.jp

Analysis of Damage in Laminated Architectural Glazing Subjected to Wind Loading and Windborne Debris Impact

Wind loading and windborne debris (missile) impact are the two primary mechanisms that result in window glazing damage during hurricanes. Wind-borne debris is categorized into two types: small hard missiles; such as roof gravel; and large soft missiles representing lumber from wood-framed buildings. Laminated architectural glazing (LAG) may be used in buildings where impact resistance is needed. The glass plies in LAG undergo internal damage before total failure. The bulk of the published work on this topic either deals with the stress and dynamic analyses of undamaged LAG or the total failure of LAG. The pre-failure damage response of LAG due to the combination of wind loading and windborne debris impact is studied. A continuum damage mechanics (CDM) based constitutive model is developed and implemented via an axisymmetric finite element code to study the failure and damage behavior of laminated architectural glazing subjected to combined loading of wind and windborne debris impact. The effect of geometric and material properties on the damage pattern is studied parametrically

TCE408H Sundown Towns in Oregon ~ Salem, Oregon Research

Final Report regarding race relations in Salem, Oregon for the Honors College course TCE 408H “Sundown Towns in Oregon.” For more information about the course: http://wpmu.library.oregonstate.edu/oregon-multicultural-archives/2013/11/30/sundown-towns-display-2013

Stresses in Laminated Glass Subject to Low Velocity Impact

Finite element analysis is used to study small, low velocity missile impact of laminated architectural glass. The impact situation models that commonly observed during severe windstorms in which small, hard missiles impact laminated glass windows in large buildings. Architectural laminated glass is typically made of two soda-lime glass plies separated by a clear, sticky, polyvinyl butyral (PVB) interlayer. In order to increase the damage tolerance of laminated glass windows, various geometric and material parameters are investigated to determine their effect in minimizing stress wave propagation through the three-layer system to the critical inside ply. Parameters investigated include the thickness of each layer of the system and the viscoelastic properties of the PVB interlayer. © 1997 Elsevier Science Ltd