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A Four Point Bend Test Experiment For Use In The Classroom, And Procedures For Evaluating Results

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1999 Annual Conference


Charlotte, North Carolina

Publication Date

June 20, 1999

Start Date

June 20, 1999

End Date

June 23, 1999



Page Count


Page Numbers

4.13.1 - 4.13.9

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Paper Authors

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Sivasubramaniam Krishnan

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Richard Griffin Texas A&M University at Qatar

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NOTE: The first page of text has been automatically extracted and included below in lieu of an abstract

Session 0564

A Four-Point Bend Test Experiment for Use in the Classroom, and Procedures for Evaluating Results

Richard Griffin Ph.D., P.E. and Sivasubramaniam Krishnan, Graduate Student

Department of Mechanical Engineering, Texas A&M University, College Station, TX 77843


Texas A&M University is a member of the Foundation Coalition, which is funded by the National Science Foundation. As part of the development of the sophomore engineering science courses, several in-class laboratory demonstrations have been developed. One of these is a four- point bend test. The students are able to make load-deflection measurements in the classroom, and determine the modulus of elasticity for different materials. This paper will describe the setup, procedure, and give examples of how different evaluation methods correlate.


During the development of the engineering science core courses at Texas A&M University, the faculty decided that it would be beneficial for the students to have some in-class laboratory activities. Under the auspices of the Foundation Coalition,1 a program of the National Science Foundation, several activities have been developed. The students taking ENGR 213, a properties of materials course, perform a tensile test, a thermal conductivity experiment,2 and determine the behavior of several electrical components in addition to the 4-point beam bending experiment for determining the modulus of elasticity. 3

The core engineering science courses developed are listed in Table 1.4,5 The connecting thread through these classes is the application of conservation principles.6 The experiments were developed for a materials course (ENGR 213), which is course is taken by the majority of departments within the College of Engineering at Texas A&M.

This paper will describe the test apparatus, the procedure, and evaluate several methods for determining the modulus of elasticity.

Krishnan, S., & Griffin, R. (1999, June), A Four Point Bend Test Experiment For Use In The Classroom, And Procedures For Evaluating Results Paper presented at 1999 Annual Conference, Charlotte, North Carolina.

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