ความแข็งแกร่งของชิ้นส่วนประกบในรอยต่อที่ยึดด้วยสลักเกลียวและแป้นเกลียวมาตรฐาน : การเปรียบเทียบค่าโดยวิธีวิเคราะห์และวิธีโฟโตอิลาสติกซิต

บทความในวารสาร

ผู้เขียน/บรรณาธิการ

กลุ่มสาขาการวิจัยเชิงกลยุทธ์

ไม่พบข้อมูลที่เกี่ยวข้อง

รายละเอียดสำหรับงานพิมพ์

รายชื่อผู้แต่ง: Tienkul, Nuttapong;Pinit, Pichet

ปีที่เผยแพร่ (ค.ศ.): 2016

วารสาร: KMUTT Research and Development Journal (0125-278X)

Volume number: 39

Issue number: 4

หน้าแรก: 547

หน้าสุดท้าย: 563

นอก: 0125-278X

URL: https://digital.lib.kmutt.ac.th/journal/loadfile.php?A_ID=821

บทคัดย่อ

Bolted joint - a non-permanent joining - is used to facilitate clamping of engineering parts. The failure criteria of the bolted joint depend on the stiffness constant of the joint, which varies according to the stiffness of both the bolts and clamped members of the joint. Since the stiffness of clamped members is rather difficult to obtain, this article presents a systematic study on the comparison of results given by various analytical methods as well as by the photoelasticity. A key part that was used in the analytical methods for the estimation of the stiffness of clamped members is the assumption that the edge of the stress field under the clamped zone could be represented by a linear equation based on half of apex angle of a truncated solid cone. In the experiments, the two members of a joint were made from resin in L-shape with the same dimensions having a through-the-thickness hole for a standard size hexagon head bolts of ISO M8 ื 1.25 mm at 50 mm long. The torque was applied to the bolt head by a torque wrench to cause a preload in the bolt from 1250 N to 2500 N at a step of 125 N. At every step of bolt preloading, the joint was placed in a circular polariscope to record the stress filed in the clamped zone. The stress fields revealed their edges as having the form of a curve rather than a straight line as assumed in the analytical methods. It was found that there is a significant difference in the stiffness of the clamped members as computed via the use of the analytical methods with the half of apex angle of 30ฐ and that from the strategy proposed in this paper. However, the analytical methods are more robust than the proposed one.

คำสำคัญ

Member Stiffness, Numerical Method of Integration, Photoelasticity