Dog Bone Material Testing

If a material is thicker than 14mm then it must be reduced.

Dog bone material testing. This test is a destructive method in which a specimen of a standard shape and dimensions prepared according to astm d 638tandard test method for tensile properties of. Report all factors that influence the tensile properties such as. In a tensile test the sample material is lathed into the shape of a dog bone for comparing the results of other materials. Flat dog bone specimens can also be die cut from a plastic sheet or machined from a block.

A dog bone or dumbbell specimen is used to tensile test plastic materials per astm d638. 4 2 this test method is designed to produce tensile property data for quality control and research and development. Tensile testing also known as tension testing is a fundamental materials science and engineering test in which a sample is subjected to a controlled tension until failure. A tensile test is a standardized test used for finding the properties for a specific material.

From these measurements the following properties can also be determined. As shown in figure 6 1ng a typical tensile duri experiment a dog bone shaped specimen is gripped at. A dog bone test sample can be composed of any material that may be tested in tension but are usually made from plastics polymers textile fabrics or rubber. If all of the sample materials had the same shape it s easier for us to compare the properties of the different materials.

To eliminate the holding and gluing problems making the direct tensile strength test hard to be applied a new method of testing specimens prepared using lathe machine to make the dog bone shape is assessed whether it could be applied to determine. The plastic dog bones are typically molded in a die to produce test specimens depending on the specific requirements of the applicable tensile testing standards. Material methods of material and specimen preparation specimen conditioning test environment speed of testing void content and volume percent reinforcement. The high fiber direction strength and orthotropic material behavior of composites often preclude the use of specimen designs and methods of load introduction developed for use in testing metals and plastics.

Dog bone shaped dts test specimens used for different brittle materials such as concretes cements and ceramics were investigated to be also used in rock material testing in this study. S plastics is subjected to an axial load. Consider for example the flat dog bone shaped specimen that s commonly used for tension testing fig.