Answered: Gage length PROBLEM 1.5-3

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Mechanical Engineering

Gage length PROBLEM 1.5-3

International Edition---engineering Mechanics: Statics, 4th Edition

4th Edition

ISBN:9781305501607

Author:Andrew Pytel And Jaan Kiusalaas

Publisher:Andrew Pytel And Jaan Kiusalaas

Chapter8: Centroids And Distributed Loads

Section: Chapter Questions

Problem 8.86P: Determine the volume of the concrete arch dam.

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Three different materials, designed A, B and C are tested in tension using test specimens having diameters of 0.505 in. and gage length of 2.0 in. (see figure). Al failure , the distance between the gage marks are found to be 2.13,2.43 and 2.78 in, respectively. Also , at the failure cross sections, the diameters are found to be 0.484,0.39S and 0.253 in. , respectively. Determine the percent elongation and percent reduction in area of each specimen. Using your own judgment, classify each material as brittle or ductile.

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ᴀ ᴅɪᴇꜱᴇʟ ᴘᴏᴡᴇʀ ᴘʟᴀɴᴛ ᴅᴇʟɪᴠᴇʀꜱ ᴀ ᴛᴏᴛᴀʟ ᴏꜰ 1.5 ᴍᴡ ᴛᴏ ꜱᴜᴘᴘᴏʀᴛ ᴛʜᴇ ᴅᴇᴍᴀɴᴅ ᴏꜰ ᴀ ʀᴇꜱɪᴅᴇɴᴛɪᴀʟ ᴀʀᴇᴀ ᴡɪᴛʜ ᴀʙᴏᴜᴛ 107 ᴋᴡ ᴛʜᴀᴛ ɢᴏᴇꜱ ꜰᴏʀ ᴘʟᴀɴᴛ ᴜꜱᴇ. ɪᴛ ʜᴀꜱ ᴀ ᴘʟᴀɴᴛ ʜᴇᴀᴛ ʀᴀᴛᴇ ᴏꜰ 10,286 ᴋᴊ/ᴋᴡʜ. ᴛʜᴇ ɢᴇɴᴇʀᴀᴛᴏʀ ᴇꜰꜰɪᴄɪᴇɴᴄʏ ɪꜱ 96.4%. ɪᴛ ɪꜱ ᴇꜱᴛɪᴍᴀᴛᴇᴅ ᴛʜᴀᴛ 12% ᴏꜰ ᴛʜᴇ ᴇɴᴇʀɢʏ ɪɴᴘᴜᴛ ᴛᴏ ᴛʜᴇ ᴇɴɢɪɴᴇ ɪꜱ ʟᴏꜱᴛ ᴛʜʀᴏᴜɢʜ ꜰʀɪᴄᴛɪᴏɴ. ᴄᴀʟᴄᴜʟᴀᴛᴇ ᴛʜᴇ ᴇɴɢɪɴᴇ ᴍᴇᴄʜᴀɴɪᴄᴀʟ ᴇꜰꜰɪᴄɪᴇɴᴄʏ ɪɴ %, ᴀɴᴅ ᴛʜᴇ ʙʀᴀᴋᴇ ʜᴇᴀᴛ ʀᴀᴛᴇ ɪɴ ᴋᴊ/ᴋᴡʜ
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