Effect of Interface Shape on the Strength for Carbon Steel/PMMA Adhered Joint
Itoh Yoshiyasu; Shindoh Takahiko; Andoh Hideyasu; Nagata Kohsoku
Abstract:The adhered joint composed of polymer and metal is a useful and practical method to take advantage of the both material properties. However, there are some basic problems for the material mismatch due to the different Young's modulus. In this study, the stress singularity at the intersection between the free surface and the interface between poly methyl methacrylate (PMMA) and structural carbon steel (JIS SS400) was analyzed to clarify the joint strength using a finite element method. As a result, the stress singularity was found above 130 degree of PMMA apex angle and between 35 and 41 degree of PMMA apex angle. In this experiment, it was confirmed that the no free edge stress singularity was useful conditions to insure the reliability of bending strength for the adhered joint composed of SS400 and PMMA. Key Words:mending strength, weibull distribution, interface, poly-methyl-methacrylate, carbon steel, adhered joint, free-edge stress singularity