Dog Bone Material Testing

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.

Dog bone material testing. 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. 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. Consider for example the flat dog bone shaped specimen that s commonly used for tension testing fig. 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.

Flat dog bone specimens can also be die cut from a plastic sheet or machined from a block. If all of the sample materials had the same shape it s easier for us to compare the properties of the different materials. A dog bone or dumbbell specimen is used to tensile test plastic materials per astm d638. Material methods of material and specimen preparation specimen conditioning test environment speed of testing void content and volume percent reinforcement.

S plastics is subjected to an axial load. Properties that are directly measured via a tensile test are ultimate tensile strength breaking strength maximum elongation and reduction in area. 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. 4 2 this test method is designed to produce tensile property data for quality control and research and development.

A tensile test is a standardized test used for finding the properties for a specific material. If a material is thicker than 14mm then it must be reduced. In a tensile test the sample material is lathed into the shape of a dog bone for comparing the results of other materials. 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.

From these measurements the following properties can also be determined. The cutting method is used to create samples from flexible material as it is easier to push the cutter through them without cracking the sample due to their ductile nature. Report all factors that influence the tensile properties such as.