Abstract: This paper explores a possible theoretical basis for the failure of attempts to develop rotary-vibratory drilling units. With the critical needs in geothermal blast hole excavation and oil ...

Abstract: This paper applies the theoretical solution developed in Part 1 of this paper to a rotary-vibratory drilling unit. The theory developed and applied in these papers explains possible causes for ...

Abstract: This paper outlines the theoretical description of the vibratory portion of the rotary-vibratory drilling process. A multiple mechanical element model is used to describe the drill string and ...

Abstract: A high precision technique for measuring Poisson’s ratios of elastomers was experimentally implemented. Test fixtures consisted of hollow metal cylinders fitted with matching pairs of pressure ...

Abstract: A composite bridge deck system assembled from glass/polyester pultruded components has been developed. This system utilizes square tubes running transverse to the traffic direction, mechanically fastened and bonded together, ...

Abstract: This article presents a simple linear damage accumulation model that may have applicability for predicting damage from sustained winds in double-sided acrylic foam tape used to attach curtain wall glazing panels to buildings. ...