Kinetostatic Modeling of an Asymmetrical Double-Stepped Beam for Displacement Amplification

Author:

Nguyen Tri-Hieu1,Pham Huy-Tuan2,Khoa Tran Ngoc Dang3,Wang Dung-An43

Affiliation:

1. National Chung Hsing University Graduate Institute of Precision Engineering, , 250 Kuo Kuang Road, Taichung 40227, Taiwan

2. Ho Chi Minh City University of Technology and Education Faculty of Mechanical Engineering, , 1 Vo Van Ngan Street, Linh Chieu Ward, Thu Duc City, Ho Chi Minh City 84 , Vietnam

3. Industrial University of Ho Chi Minh City Faculty of Mechanical Engineering, , 12 Nguyen Van Bao, Ward 4, Go Vap District, Ho Chi Minh City 70000 , Vietnam

4. National, Chung Hsing University Graduate Institute of Precision Engineering, , 250 Kuo Kuang Road, Taichung 40227, Taiwan ;

Abstract

Abstract A kinetostatic model of an asymmetrical double-stepped beam under axial loading is developed. The beam is composed of two thick segments and three thin segments where a thick segment is between two thin segments, and the longitudinal axis of the thick segment is not colinear with that of the thin segment. The kinetostatic model based on the beam constraint model (BCM) is capable of predicting accurate bending and near-buckling behaviors of the beam. A virtual rigid link neighboring the noncolinear segments is introduced in the BCM to broaden the applicability of the BCM. An analytical formula to represent the critical load of a symmetrical double-stepped beam under axial loading is derived and the value calculated by the formula agrees with the limit load of the asymmetrical double-stepped beam within the elastic range. The investigated beam has potential applications in displacement amplifiers and robotic grippers.

Funder

National Science Council

Publisher

ASME International

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