しなやかな構造（棒・板・殻）の力学的評価

金属材料

高分子材料

変形

破壊

不均質材料に対する変形・破壊の評価

金属材料

高分子材料

ガラス・セラミックス

複合材料

熱応力

耐熱コーティングや薄膜に生じる熱応力や座屈の評価

Cross-linked
network in rubber

傾斜機能材料による熱応力緩和と局所座屈の評価
Polycrystal
grains in metal

Statistical fracture simulationof inhomogeneous materials
高分子材料

熱応力

座屈

ポリマーシートに対する熱変形の評価© 島根大学 材料力学研究室（森本卓也）

座屈

複合材料

変形

熱応力

積層平板や偏平シェルの変形制御

金属材料

座屈

金属材料

パイプの局所座屈発生予測

高分子材料

熱応力

変形

フレキシブルエレクトロニクスデバイスの曲げ変形評価

Localized defects in cylindrical pipes

金属材料

高分子材料

ガラス・セラミックス

変形

破壊

接触

摩擦

線材（撚りコード／繊維束）の力学的評価
金属材料

高分子材料

変形

接触

摩擦

プロセス・搬送システムの設計
ゴムベルト／鋼板の搬送と張力付加／
高分子繊維・フィルムの引き抜き加工／ウェブハンドリング
tight spanslip zone
stick zone

drivendriverstick zone

slip zoneslack spanvelocity, v/c ( = stretch, θ' )tension, T/(AE)4−3x 10tight free spanstick

driven pulley

slip

tight free span

slip

100

375

250

125

00

1.004
1.003
1.002
1.001
10π /2π

3π / 22π

5π/2arclength, s = (S+ct)/r© 島根大学 材料力学研究室（森本卓也）

stick

3π

7π/2

4π

T[N]

driving pulleyやわらかい材料（ゴム・ゲル）の力学的評価

高分子材料

変形座屈

「しわ」を伴う表面パターンの制御
Uniaxialxpz = 0.7xp

z = 0.65

z = 0.5xpx

z = 0.59xp

εprex = 0.3z = 0.31mmpz = 0.43

εprex = 0.5xpz = 0.24

εprex = 0.71mm

1mm

1mm

Equi-biaxial

Hf /Hs ≈ 1/50 ,1mm

1mm

Biaxialxpxp

z = 0.35xp

z = 0.16

εprex =11mm

1mm

1mm

High Compression

高分子材料

変形

座屈

膨潤や成長に伴う体積成長による形と動きの制御© 島根大学 材料力学研究室（森本卓也）

10mm

1mm

複合材料

破壊

繊維強化ゴムの疲労寿命予測

高分子材料

変形

摩擦

座屈

ゴムの摩擦と変形のモデリングuniform shear

高分子材料

変形

non-uniform shear

座屈

ゴムの局所座屈を利用した制振特性評価
Simulation

i. u = 0 mm

Experiment

Setup of transmittance experiments

accelerometerstingerfrom shaker

ii. u = 10 mm

10mm

Magnified motion (x20) by high-speed camera foru = 0 and f = 200 [Hz]1 cycle© 島根大学 材料力学研究室（森本卓也）

固体材料の表面・接触・摩擦・摩耗の力学的評価（トライボロジー）
750

金属材料

接触

M. Nonogaki et al. / Tribology International 36 (2003) 745–752

摩耗

二粗面固体間の弾塑性接触や摩耗／なじみプロセスのモデリング

Fig. 8. Changes in surface proﬁle of bearing and PDFs.

the relationship between p and b in Fig. 4, it is impossible to determine the truncation parameters using thepresent method. In the case of existence of deep
scratches, the reproduced PDF did not agree with theoriginal PDF of the measured surface proﬁle, as shownin Fig. 10(a), although the truncation could be determined.
In the proﬁle curve in Fig. 10(a), there are two large
金属材料
複合材料
破壊
摩耗
scratches (the depth being about 2 and 3 µm), whereas
the maximum depth of valley is 1 µm or less. If the多孔質粒子分散型複合材料の摩耗と破壊靱性の評価
scratch of about 3 µm depth is changed to 1 µm, asshown in the roughness proﬁle in Fig. 10(b), then, as isshown in Fig. 10(b), the reproduced PDF agrees wewith the original one. It is noticed that the valley parof the PDF nears a Gaussian distribution with change odepth of the scratches.
In the case of the proﬁle in Fig. 11, a wide depressio
exists, and it deviates from Gaussian distribution in thvalley part. As a result, the reproduced PDF does no
coincide with the original one. Therefore, it is necessar
for applying the method presented in this paper in th
estimation of the truncation, that the valley part of th
PDF be approximately Gaussian in distribution.

Fig. 8. Changes in surface proﬁle of bearing and PDFs.

the relationship between p and b in Fig. 4, it is impossible to determine the truncation parameters using thepresent method. In the case of existence of deep
scratches, the reproduced PDF did not agree with theoriginal PDF of the measured surface proﬁle, as shownin Fig. 10(a), although the truncation could be determined.
In the proﬁle curve in Fig. 10(a), there are two large
scratches (the depth being about 2 and 3 µm), whereas
the maximum depth of valley is 1 µm or less. If thescratch of about 3 µm depth is changed to 1 µm, as
shown in the roughness proﬁle in Fig. 10(b), then, as is© 島根大学 材料力学研究室（森本卓也）

shown in Fig. 10(b), the reproduced PDF agrees wewith the original one. It is noticed that the valley paof the PDF nears a Gaussian distribution with change odepth of the scratches.
In the case of the proﬁle in Fig. 11, a wide depressio
exists, and it deviates from Gaussian distribution in thvalley part. As a result, the reproduced PDF does nocoincide with the original one. Therefore, it is necessar
for applying the method presented in this paper in th
estimation of the truncation, that the valley part of th
PDF be approximately Gaussian in distribution.