Crank slider dynamic

j J k K KE K , 1 L rn SOFTbank E-Book Center Tehran, Phone: 66403879,66493070 For Educational Use. STRENGTHS OF MATERIALS 3 M and torque T, the maximum direct and shear stresses, a, and 7,,, are equal to those produced by 'equivalent' moments M e and T, where 5, = T,/Z, and a , = M,/Z where Z , = polar modulus T, = ,/m and M e = (M + T,)/2 nD3 K ( D 4 -d 4 ) Z=-(solid shaft) or -~ (hollow shaft) 32 32

Shaft is a most common and important machine element. Shafts are widely used mechanical components which are used to transmit power through devices such as gears and pulleys. The shaft is generally acted upon by bending moment, torsion and axial force. Design of shaft primarily involves in determining stresses at critical point in the shaft that is arising due to aforementioned loading. The friction and other losses in this type of power transmission equipment are comparatively very low. In this paper we use a software called “MATLAB” to write a program to design a shaft. MATLAB is extensively used for scientific and research purposes. It is accurate and also has a number of built in functions which makes it versatile. Still MATLAB is not effectively being used in mechanical engineering field. At present the MATLAB code for design of shafts doesn’t exists. Our MATLAB code works for all solid shafts mounted with number of pulleys and gears. The program is user friendly one & when executed it ask the inputs and performs the necessary design calculations and gives necessary output values. We have taken both maximum shear stress theory and maximum normal stress theory into consideration. It also generates the diagrams for horizontal, vertical and resultant bending moments over the lengths of the shaft. As computers are used to perform the task of shaft design becomes simple, fast, friendly and error free.

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International Journal of Scientific Research in Science, Engineering and Technology, 2024

This study explores the extent to which SmartPM's AI-driven analytics can predict and mitigate the potential impending schedule delays on complex infrastructure projects. From this study, the exhaustive research based on case study and associated data asserts that AI-driven predictive analytics can significantly leverage the outcomes of projects by bringing the identified potential delays to notice before such occurrences and provide actionable insight regarding the possible strategies to mitigate it.

RESUMEN Las regiones de frontera y los confines han sido usualmente estudiados en el contexto de las historias y de los procesos de formación de las naciones y sus " comunidades imagi-nadas ". Sin embargo, la historia de los márgenes y periferias, como los entendemos en el mundo contemporáneo, nace con la historia del capitalismo. En este trabajo se pretende situarlos en este contexto, mostrando cómo una de las estrategias necesarias para la ex-pansión del capital, ha sido la transformación (mediante una serie de prácticas discursi-vas y materiales) de una serie de regiones en " tierras de nadie " , en espacios donde se im-pone un régimen de excepción que define los términos de su desarrollo y su articulación a la economía global. Con este objetivo, se explora el caso de las regiones categorizadas como periféricas en América Latina. Con el fin de desnaturalizar la idea de márgenes y periferias, se muestra la forma en que las nociones que las constituyen (como regiones salvajes y despobladas que ocultan enormes riquezas), oculta la racionalidad y la lógica de las intervenciones mediante las cuales se implementan las formas particulares, y en muchos casos brutales, que adopta aquí el capitalismo. ABSTRACT Frontier lands and remote territories have usually been studied in the context of national histories, as part of the formation of nations and their " imagined communities ". However, the history of margins and peripheries, as we understand them today, is more closely related to the history of capitalism. In this paper, my aim is to situate them in this context, in order to shed light to the fact that one of the most important spatial strategies for the expansion of capitalism has been the transformation (through a series of discursive and material practices) of many historical regions in the planet into " no man's lands " : into spaces subjected to a regime of exception. This regime defines both the model of development they will have to adopt, and the manner in which they are to be articulated to the world economy. This paper explores the regions categorised as peripheral in Latin America from this perspective. In order to denaturalize them as margins and peripheries, the notions that constitute them (eg. as wild and deserted lands teeming with riches) will be explored, exposing their function in obscuring the logic and the brutal rationality of capitalist interventions.