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Updated: Jun 20, 2026

A Novel Biaxial Testing Apparatus for the Determination of Forming Limit under Hot Stamping Conditions
Published on: April 4, 2017
A uniaxial tension system and its applications in testing of thin films and small components
Wenwang Wu1, Xide Li, Liang Liu
1Department of Engineering Mechanics, ALM, Tsinghua University, Beijing 100084, China.
Abstract:
The aim of this investigation is to develop a uniaxial tension system for testing very small samples that allows observation of the gauge section by optical or atomic force microscopy. Major parts of the system consist of a pair of identical piezoelectric actuators, two symmetrical double-cantilevered force sensors, and two symmetrical universal coupling joints. It can accomplish both-end loaded uniaxial tension to produce centrosymmetric deformations of the tested objects in the field of view and can apply tensile loads in the range from 7.8 microN to 15 N to the samples. Sample extensions from submicrometers to 100 microm can be measured with displacement resolution of several tens of nanometers. The system's performance is demonstrated by tests of a polycrystalline aluminum alloy thin sheet, a mica thin sheet, and a fibril of bamboo.
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