材力研HP

  セラミックス材料としての縄文土器の強度に関する研究

縄文土器・弥生土器

縄文時代は今から約一万三千年前から二千年前の日本の時代である.縄文時代には様々な文化が発達していたことが確認されている.この発展によって当時の人々の生活様式は劇的に変化した.縄文土器は縄文時代における代表的な道具のひとつである. 現在,考古学的価値により破壊を伴う試験を行えないため,土器の強度の技術的な価値に対する研究は少ない.本研究では,縄文土器の曲げ強さおよび靱性に関して実験的に検討する.その結果から,当時の人々が有していた縄文土器に対する技術的知識を定量的に評価する.







F.Y.2016
Characteristic of material strength of the ancient ceramics which mica and chaff ware added into

The Jomon ware is the most valuable devices which changed the lifestyle of Jomon people. Although the study as a cultural art on Jomon ware has been carried out very much, the study as a material strength of it is rare because the destructive testing of it is difficult. The purpose of this study is to evaluate the Jomon ware from a point of view of strength of materials. The influence of mixing admixture of mica and chaff on strength properties of the ware and that of changing firing time were examined. Four point bending tests are carried out for measuring bending strength and fracture toughness. As a result, bending strength and fracture toughness become stronger by mixing admixture and changing firing time.


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F.Y.2015(B4)
Strength properties of Jomon ware materials as ancient ceramics

Although the study as a cultural anthropology on Jomon ware has been carried out very much, the study on a material strength of it is rare because the destructive testing of it is difficult. The purpose of this study aims to examine the strength of the Jomon ware materials.Four point bending tests are carried out for measuring bending strength and fracture toughness. As a result, bending strength and fracture toughness become stronger by reducing the defects such as cracks and holes.


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F.Y.2014
Characteristic of material strength of the Jomon ware which mica was added into

The Jomon era is the former Japanese era which is about 10000 years. Various cultures had been evolved in the Jomon era. The lifestyle of Jomon people was changed in the Jomon era. The Jomon ware is one of the devices in the Jomon era. The purpose of this study is to evaluate the Jomon ware from a point of view of strength of materials. The influence of the mixing ratio of clay, sand and mica on strength properties of the pottery was examined. The research methods are observation of structure, four point bending test and fracture toughness test. From the result, we quantitatively evaluate the technical knowledge which Jomon people had.


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F.Y.2013
Strength and fracture toughness of Jomon pottery material of which the ratio of clay and sand was changed

Invention of Jomon pottery enabled people to cook and reserve food. The invention changed their life style. It has interesting decoration in terms of not only from history, culture but also from the study of strength of material. The purpose of this study is to research in term of materials mechanics. Four point bending test specimens are used for measuring bending strength and fracture toughness. As a result, the bending strength and fracture toughness increase with increasing in weight ratio of clay and that of mica. And mica has a role to promote blanching during crack propagation.


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F.Y.2012
Strength and fracture toughness of Jomon pottery material which mica was added into

Jomon pottery has evolved with the times. But Jomon pottery is researched from only archaeological viewpoint. The purpose of present study is to evaluate the Jomon pottery from a viewpoint of materials strength. The influence of mixing ratio of clay and sand on strength properties of the pottery materials was examined. We produced the specimen of pottery materials by changing the mixing ratio. By using the specimens, four point bending test, fracture toughness test and observation of cross-section were performed. As a result, the bending strength and fracture toughness was increasing with decreasing the mixing ratio of the sand. Accumulated technology and knowledge of the people of Jomon period was valid for materials strength improvement.


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